WO2014101265A1 - Slow-release compound fertilizer applicable to plantation of corn - Google Patents
Slow-release compound fertilizer applicable to plantation of corn Download PDFInfo
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- WO2014101265A1 WO2014101265A1 PCT/CN2013/001241 CN2013001241W WO2014101265A1 WO 2014101265 A1 WO2014101265 A1 WO 2014101265A1 CN 2013001241 W CN2013001241 W CN 2013001241W WO 2014101265 A1 WO2014101265 A1 WO 2014101265A1
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B3/00—Fertilisers based essentially on di-calcium phosphate
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
Definitions
- the invention is a slow release compound fertilizer suitable for corn planting application. It is a mixture of various fertilizers and no special fertilizer components. Background technique
- Maize is an important food crop and cash crop. Statistics show that its yield and acreage are second only to rice and wheat, ranking third in the world. It plays an important role in the people's death and the national economy. Effective use of limited land resources and improvement of the yield and quality of corn crops are the direction and eternal issues of people's efforts.
- mineral elements that need to be absorbed by corn growth and development, mainly three kinds of elements: nitrogen, phosphorus and potassium; major elements such as sulfur, calcium and magnesium, and iron, manganese, boron and copper. Trace elements such as zinc and sodium. Corn has the most nitrogen demand for growth, followed by phosphorus and potassium. In addition, zinc plays an active role in the synthesis of endogenous auxin such as indole acetic acid in corn, which is one of the essential elements for increasing the chlorophyll content of corn products.
- nitrogen, phosphorus and potassium major elements such as sulfur, calcium and magnesium, and iron, manganese, boron and copper.
- Trace elements such as zinc and sodium.
- Corn has the most nitrogen demand for growth, followed by phosphorus and potassium.
- zinc plays an active role in the synthesis of endogenous auxin such as indole acetic acid in corn, which is one of the essential elements for increasing the chlorophyll content of corn products.
- Urea is a high-quality nitrogen fertilizer with high nitrogen content, fast fertilizer efficiency and large dosage.
- urea in the process of using urea, it is easy to be lost through volatilization, leaching, decomposition and runoff, resulting in low efficiency of fertilizer efficiency.
- the utilization rate in the current season is only about 30%, which not only causes waste of fertilizer, but also It pollutes the environment in which humans depend on the atmosphere, water and soil.
- Phosphorus is an important component of biological cytoplasm and an essential element in plant growth.
- Apatite is the most important mineral raw material for the production of phosphate fertilizer and phosphorus and its compounds; however, the production of phosphate fertilizer requires P 2 0 5 28% in the apatite: the content of apatite P 2 0 5 required for the extraction of phosphorus and its compounds higher.
- the coating material is difficult to degrade, and the use of 1 month will have a negative impact on the soil; tt ⁇ pollute the soil, affecting the agriculture Quality of products.
- the object of the present invention is to avoid the above-mentioned deficiencies in the prior art, and to provide a comprehensive nutrition, excellent sustained release performance, can fully meet the nutrient demand of corn, maximize the effectiveness of fertilizer, and can improve corn yield.
- a slow-release compound fertilizer suitable for corn planting which can improve its quality, that is, save resources and protect the environment.
- the object of the present invention can be achieved by the following measures:
- the mixed phosphate fertilizer is prepared by compounding diammonium phosphate, calcium magnesium phosphate fertilizer and apatite powder, and the mass percentage thereof is as follows: diammonium phosphate 45 ⁇ 60
- the apatite powder is hydroxyapatite powder ⁇ 2 0 5 content of the low grade phosphate powder of between 10% ⁇ 20%;
- the granulation aid 70%_8 of bentonite and 30%-15% of aluminum strontium powder are mixed to form:
- the preparation method comprises the following steps:
- the apatite is ground into powder, and the fineness of the apatite powder is controlled by 100 mesh ⁇ 10, standby; b. mixing
- the potassium fertilizer and the nitrogen fertilizer complex prepared in the first step are mixed with 15 to 35 parts by weight of the mixed phosphate fertilizer prepared in the second step, and the zinc and iron additives are mixed in an amount of 0.1 to 0.5 parts by weight, and 7 to 10 parts by weight of the granulating agent is added thereto, and the amount of water is appropriate.
- the amount of stearic acid is 1. 0% ⁇ 3. 0 % of the mass of the mixed particles of the composite fertilizer prepared in the third step, and the coating method is as follows:
- the coating is accurately metered with stearic acid according to the formula, it is put into the stearic acid melting tank and heated to the molten state for use; b. .
- the mixed particles of the composite fertilizer prepared in the step 3 are accurately measured, and the molten stearic acid prepared in the step a is sprayed in the drum type mixing granulator to make the outer surface of the mixed particles as uniform as possible.
- Coating, heat 14 dry, room temperature air cooling, standby; process conditions are as follows:
- Hot air drying temperature is not higher than 80 ° C
- the cooling air temperature is not higher than 50 ° C ;
- the zeolite powder 89% ⁇ 99% of the raw material ratio, accurately weigh the raw materials, mix evenly, grind the powder, control the fineness of the powder over 120 mesh Sieve, spare;
- the amount of mixed powder prepared in step a is controlled to 5 ⁇ 15 kg per 1000 kg of granular urea powder;
- S and Ca are also in great demand and are indispensable nutrients for plant production.
- Sulfur is an important component of protein.
- Calcium plays an irreplaceable role in plant seed germination and organ development.
- the S and Ca elements enter the compound fertilizer component and have positive effects in crop growth, pest control and soil improvement.
- the sulfur element in the raw material formulation of the present invention is added in the form of soluble sulfate, and the proportion is large, and the fourth largest nutrient element necessary for crop growth provides direct supply of sulfur nutrients to the corn.
- the apatite component in the formula mixed phosphate fertilizer, in addition to the phosphorus element, also provides calcium, which is compatible with other components in the raw material formula and is suitable for corn growth. To increase the yield and quality of corn. Made a contribution.
- the object of the invention can also be achieved by the following measures:
- the mixed phosphate fertilizer, diammonium phosphate, calcium magnesium phosphate fertilizer and apatite powder are compounded, and the mass percentage thereof is as follows: diammonium phosphate 45 ⁇ 60
- Apatite powder 10 ⁇ :. T is the preferred technical solution for application to corn) ⁇ slow-release compound fertilizer of the present invention, characterized by the material is made in accordance with the fraction of the total mass: Urea 30
- the mixed phosphate fertilizer is prepared by compounding diammonium phosphate, calcium magnesium phosphate fertilizer and apatite powder, and the mass percentage thereof is as follows: diammonium phosphate 50
- the method for applying the slow-release compound fertilizer suitable for corn planting application of the invention is characterized in that the ditch is applied below the surface, the bottom fertilizer: 40 ⁇ 60Kg/mu; the top dressing: 30 ⁇ 40 Kg/mu.
- the coating material can be degraded under the action of soil microorganisms, avoiding the pollution of the coating material to the soil environment.
- the ratio of the main nutrient elements in the fertilizer is reasonable.
- the sulfur element in the raw material formula is added in the form of soluble sulfate, and the proportion is large.
- the fourth largest nutrient element necessary for crop growth provides direct supply of sulfur nutrients to the corn. High fertilizer efficiency, increasing corn yield and quality.
- the sustained-release compound fertilizer suitable for corn planting application of the invention is prepared according to the following steps:
- urea 30 parts by weight of urea is heated and melted, and then 10 parts by weight of ammonium sulfate and 25 parts by weight of potassium sulfate are added and uniformly mixed to prepare a potassium fertilizer and a nitrogen fertilizer compound containing potassium, sulfur and ammonium, and used;
- the potassium fertilizer and the nitrogen fertilizer composite prepared in the first step were mixed with 27 parts by weight of the mixed phosphate fertilizer prepared in the second step, and 0.5 parts by weight of the zinc and iron additives were uniformly mixed, and 7.5 parts by weight of the granulating agent was added thereto, and the amount of water was adjusted.
- the composite fertilizer components are mixed and granulated by a conventional granulator, and used;
- the amount of stearic acid is 1. 0% ⁇ 3. 0 % of the mass of the mixed particles of the composite fertilizer prepared in the third step, and the coating method is as follows:
- the coating is accurately metered with stearic acid according to the formula, it is put into the stearic acid melting tank and heated to the molten state for use; b. .
- the particles of the composite fertilizer prepared in step 3 are mixed, and the molten stearic acid prepared in the step a is sprayed in the drum type mixing granulator to make the outer surface of the mixed particles as uniform as possible.
- Coating, hot air drying, room temperature air cooling, standby; process conditions are as follows:
- Heat W drying temperature is not higher than 80 ⁇
- the cooling air temperature is not higher than 50 ° C ;
- the zeolite powder 89% ⁇ 99% of the raw material ratio, accurately weigh the raw materials, mix evenly, grind the powder, control the fineness of the powder over 120 mesh Sieve, spare;
- the amount of mixed powder prepared in [a] a is controlled at 5 to 15 kg per 1000 kg of granular urea powder: 6. Screening, metering, quality inspection, and post-qualification packaging, suitable for: ⁇ rice planting application of slow-release compound fertilizer: The obtained product particles have a rounded appearance and no odor;
- the slow-release compound fertilizer suitable for corn planting application of the present invention is prepared according to the raw material formula of Table 1.
- the element contains ⁇ % 5;15
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Abstract
The present invention relates to preparation of a mixture of a plurality of fertilizers and components with no special fertilizer effectiveness. Provided is a slow-release compound fertilizer applicable to plantation of corn. The compound fertilizer is characterized by being prepared from the following raw materials in parts by mass: 15 to 45 parts of urea, 5 to 40 parts of ammonium sulfate, 20 to 35 parts of potassium sulfate, 15 to 35 parts of a mixed phosphate fertilizer, 0.1 to 0.5 part of a zinc and iron additive, 7 to 10 parts of a granulating auxiliary agent, and a proper amount of water. A preparation method comprises the following steps: (1) preparation of a compound of a potash fertilizer and a nitrogen fertilizer; (2) preparation of the mixed phosphate fertilizer; (3) preparation of mixed particles of the components of the compound fertilizer; (4) coating with stearic acid; (5) powder spreading of a modified zeolite powder material; and (6) screening, metering, quality inspection, and packaging of qualified fertilizer. The present invention provides a special slow-release long-acting compound fertilizer for corn and a preparation method thereof. The compound fertilizer has overall nutrients and excellent slow-release performance, can fully satisfy demands for nutrients by corn, enables fertilizer effectiveness to be maximally performed, improves both yield and quality of corn, saves resources, and protects the environment.
Description
适合于玉米种植施用的缓释复合肥料 技术领域 Slow-release compound fertilizer suitable for corn planting
本发明是一种适合于玉米种植施用的缓释复合肥料。 属于多种肥料与无特殊肥效组分的 混合物。 背景技术 The invention is a slow release compound fertilizer suitable for corn planting application. It is a mixture of various fertilizers and no special fertilizer components. Background technique
玉米是重要的粮食作物和经济作物， 有统计显示， 其产量和种植面积仅次于水稻和小麦， 居世界第三位。 在民生和国民经济中占有重要地位。 有效利用有限的土地资源， 提高玉米作 物的产量和品质是人们努力的方向和永恒的课题。 Maize is an important food crop and cash crop. Statistics show that its yield and acreage are second only to rice and wheat, ranking third in the world. It plays an important role in the people's livelihood and the national economy. Effective use of limited land resources and improvement of the yield and quality of corn crops are the direction and eternal issues of people's efforts.
玉米生长发育需要吸收的矿质元素多达 20多种， 主要有氮、 磷、 钾三种大量元素； 硫、 钙、 镁等常量元素和铁、 锰、 硼、 铜。 鋅、 钠等微量元素。 玉米生长需求的氮元素最多， 磷 元素次之， 钾元素最少。 此外， 鋅元素对玉米体内吲哚乙酸等内源生长素的合成起到积极作 用， 铁元素会对提高玉米产品中叶绿素的含量是必不可少的元素之一。 There are more than 20 kinds of mineral elements that need to be absorbed by corn growth and development, mainly three kinds of elements: nitrogen, phosphorus and potassium; major elements such as sulfur, calcium and magnesium, and iron, manganese, boron and copper. Trace elements such as zinc and sodium. Corn has the most nitrogen demand for growth, followed by phosphorus and potassium. In addition, zinc plays an active role in the synthesis of endogenous auxin such as indole acetic acid in corn, which is one of the essential elements for increasing the chlorophyll content of corn products.
尿素是含氮高、 肥效快、 用量大的优质氮肥。 但是， 尿素在使用过程中， 容易通过挥发、 淋溶、 分解和径流等途径流失， 导致肥效利用率不高， 据统计， 当季利用率只有 30 %左右， 这不仅造成了化肥的浪费， 而且对于大气、 水体土壤等人类赖以生存的环境造成污染。 Urea is a high-quality nitrogen fertilizer with high nitrogen content, fast fertilizer efficiency and large dosage. However, in the process of using urea, it is easy to be lost through volatilization, leaching, decomposition and runoff, resulting in low efficiency of fertilizer efficiency. According to statistics, the utilization rate in the current season is only about 30%, which not only causes waste of fertilizer, but also It pollutes the environment in which humans depend on the atmosphere, water and soil.
施可丰化工股份有限公司申请的中国专利申请号 201 1 10021688.8《可生物降解包膜尿素》 成功地解决了尿素氮肥存在的以上问题， 利用能在土壤微生物作用下降解的硬脂酸作为氮肥 尿素的包膜材料， 提供了一种包膜材料可生物降解， 无污染， 又能提高肥料的利用率的可生 物降解包膜尿素产品。 但是， 它只是一种优质氮肥， 营养成分单一， 不能作为适合于玉米种 植施用的缓释肥料。 China Patent Application No. 201 1 10021688.8 "Biodegradable Coated Urea" applied by Shi Kefeng Chemical Co., Ltd. successfully solved the above problems of urea nitrogen fertilizer, using stearic acid which can be degraded under the action of soil microorganisms as nitrogen fertilizer urea The coating material provides a biodegradable coated urea product which is biodegradable, non-polluting, and improves the utilization of fertilizer. However, it is only a high-quality nitrogen fertilizer with a single nutrient composition and cannot be used as a slow-release fertilizer suitable for corn planting.
磷是生物细胞质的重要组成元素， 也是植物生长必不可少的一种元素。 磷灰石是制造磷 肥和提取磷及其化合物的最主要矿物原料； 但是制造磷肥要求磷灰石中的 P205 28%: 提取 磷及其化合物要求的磷灰石 P205的含量更高。 Phosphorus is an important component of biological cytoplasm and an essential element in plant growth. Apatite is the most important mineral raw material for the production of phosphate fertilizer and phosphorus and its compounds; however, the production of phosphate fertilizer requires P 2 0 5 28% in the apatite: the content of apatite P 2 0 5 required for the extraction of phosphorus and its compounds higher.
而且随着磷化工产品和磷肥工业的发展， 磷矿粉需要量迅速增加， 高品位磷矿资源匮乏。 仅仅依赖于富磷矿的生产方式己不能满足要求。 在这种情况下， 品位不高的磷灰石资源的丌 发利用， 无论对于节约资源， 还是保护环境都具有重要意义。 Moreover, with the development of phosphorus chemical products and phosphate fertilizer industry, the demand for phosphate rock powder is increasing rapidly, and the resources of high-grade phosphate rock are scarce. The production method that relies solely on phosphate-rich mines cannot meet the requirements. In this case, the utilization of apatite resources with low grades is of great significance for both resource conservation and environmental protection.
综上所述， 现有技术中的玉米专用肥料存在如下不足： In summary, the prior art corn-specific fertilizers have the following disadvantages:
1.. 多层包膜， 生产工艺复杂、 投资大、 生产成本高。 1. Multi-layer coating, complex production process, large investment and high production cost.
2. 包膜材料难以降解， 1£期使用会给土壤带来负面影响； tt^对土壤造成污染， 影响农
产品的质量。 2. The coating material is difficult to degrade, and the use of 1 month will have a negative impact on the soil; tt^ pollute the soil, affecting the agriculture Quality of products.
3. 肥料中的主要营养元素配比不尽合理， 肥效利用率低。 3. The ratio of the main nutrients in the fertilizer is not reasonable, and the fertilizer efficiency is low.
4. 缺乏必须的中量或微量元素， 营养不全面， 影响产量提高。 4. Lack of necessary medium or trace elements, incomplete nutrition, affecting yield.
4. 氮肥利用率低， 浪费资源， 污染环境。 4. Low nitrogen utilization rate, wasting resources and polluting the environment.
5. 适合于玉米种植施用的缓释复合肥料还不多见。 发明内容 5. Slow-release compound fertilizers suitable for corn planting are rare. Summary of the invention
本发明的目的在于避免上述现有技术中的不足之处， 而提供一种营养全面， 缓释性能优 异， 能充分满足玉米对养分的需求， 最大限度的发挥肥料的效力， 既能提高玉米产量又能提 高其品质、 即节约资源， 又保护环境的适合于玉米种植施用的缓释复合肥料。 The object of the present invention is to avoid the above-mentioned deficiencies in the prior art, and to provide a comprehensive nutrition, excellent sustained release performance, can fully meet the nutrient demand of corn, maximize the effectiveness of fertilizer, and can improve corn yield. A slow-release compound fertilizer suitable for corn planting, which can improve its quality, that is, save resources and protect the environment.
本发明的目的可以通过如下措施来达到： The object of the present invention can be achieved by the following measures:
本发明的适合于玉米种植施用的缓释复合肥料， 其特征在于由如下按照质量份数计的原 料制成： The sustained-release compound fertilizer suitable for corn planting application of the present invention is characterized in that it is made of the following raw materials in parts by mass:
尿素 15〜45 Urea 15~45
硫酸钹 5〜40 Barium sulfate 5~40
硫酸钾 20〜35 Potassium sulfate 20~35
混合磷肥 15〜35 Mixed phosphate fertilizer 15~35
锌、 铁添加剂 0.1〜0.5 Zinc, iron additive 0.1~0.5
造粒助剂 7〜10 Granulation aids 7~10
水 适量 Water amount
其中： among them:
所述混合磷肥 磷酸二铵、 钙镁磷肥与磷灰石粉复合而成， 其质量百分比例如下： 磷酸二铵 45〜60 The mixed phosphate fertilizer is prepared by compounding diammonium phosphate, calcium magnesium phosphate fertilizer and apatite powder, and the mass percentage thereof is as follows: diammonium phosphate 45~60
钙镁磷肥 15〜35 Calcium magnesium phosphate fertilizer 15~35
磷灰石粉 10〜35 所述磷灰石粉是 Ρ205含量在 10%〜20%之间的低品位磷矿粉； 10~35 the apatite powder is hydroxyapatite powder Ρ 2 0 5 content of the low grade phosphate powder of between 10% ~ 20%;
所述造粒助剂 70%_8 的膨润土和 30%- 15%的铝矾上粉混合组成： The granulation aid 70%_8 of bentonite and 30%-15% of aluminum strontium powder are mixed to form:
其制备方法包括如下 骤： The preparation method comprises the following steps:
①. 钾肥、 氮肥复合物的制备 1. Preparation of potassium fertilizer and nitrogen fertilizer complex
首先把尿素 30〜45重量份加热熔融后， 加入硫酸铵 5〜40：霞量份和硫酸钾 20〜 重 份混合均匀， 制得含有钾、 硫、 铵的钾肥、 氮肥复合物， 备用；
② . 混合磷肥制备 First, 30~45 parts by weight of urea is heated and melted, and then ammonium sulfate 5~40: Xia amount and potassium sulfate 20~ parts are mixed uniformly to prepare potassium fertilizer, nitrogen fertilizer complex containing potassium, sulfur and ammonium, and used; 2. Preparation of mixed phosphate fertilizer
a. 磷灰石粉的制备 a. Preparation of apatite powder
将含 P2O510%〜20°/。磷灰石磨成粉， 磷灰石粉的细度控制 100目 ± 10， 备用； b. 混合 Will contain P 2 O 5 10%~20°/. The apatite is ground into powder, and the fineness of the apatite powder is controlled by 100 mesh ± 10, standby; b. mixing
将磷酸二铵 45〜60重量份、钙镁磷肥 15〜35重量份与歩骤 a制备的磷灰石粉 10〜35重 量份混勾， 备用； 45~60 parts by weight of diammonium phosphate, 15~35 parts by weight of calcium magnesium phosphate fertilizer, and 10~35 parts by weight of the apatite powder prepared in step a, are mixed;
③ . 复合肥料各组分混合颗粒的制备 3. Preparation of mixed particles of various components of compound fertilizer
将歩骤①制备的钾肥、 氮肥复合物与歩骤②制备的混合磷肥 15〜35重量份， 锌、 铁添加 剂 0.1〜0.5重量份混和均匀， 加入造粒剂 7〜10重量份， 水适量。 利用传统造粒机将所述复 合肥料各组分混合造粒， 备用； The potassium fertilizer and the nitrogen fertilizer complex prepared in the first step are mixed with 15 to 35 parts by weight of the mixed phosphate fertilizer prepared in the second step, and the zinc and iron additives are mixed in an amount of 0.1 to 0.5 parts by weight, and 7 to 10 parts by weight of the granulating agent is added thereto, and the amount of water is appropriate. Mixing and granulating the components of the composite fertilizer with a conventional granulator;
④ .硬脂酸涂膜 4. Stearic acid coating
硬脂酸的用量为歩骤③制备的复合肥料各组分混合颗粒质量的 1. 0 %〜3. 0 % , 涂膜方法 如下： The amount of stearic acid is 1. 0%~3. 0 % of the mass of the mixed particles of the composite fertilizer prepared in the third step, and the coating method is as follows:
a. .熔融硬脂酸的制备 a. Preparation of molten stearic acid
包膜用硬脂酸经按照配方准确计量后， 投入硬脂酸熔融槽中， 加热至熔融状态， 备用； b. .包膜 After the coating is accurately metered with stearic acid according to the formula, it is put into the stearic acid melting tank and heated to the molten state for use; b. .
按照配方准确计量歩骤③制备的复合肥料各组分混合颗粒，用歩骤 a制备的熔融硬脂酸， 在滚筒式混合造粒机中进行颗粒外喷涂， 使混合颗粒外表面形成尽可能均匀的涂层， 热 14干 燥、 室温风冷却， 备用； 工艺条件如下： According to the formula, the mixed particles of the composite fertilizer prepared in the step 3 are accurately measured, and the molten stearic acid prepared in the step a is sprayed in the drum type mixing granulator to make the outer surface of the mixed particles as uniform as possible. Coating, heat 14 dry, room temperature air cooling, standby; process conditions are as follows:
热风干燥温度不高于 80°C Hot air drying temperature is not higher than 80 ° C
冷却气流温度不高于 50°C ; The cooling air temperature is not higher than 50 ° C ;
⑤ . 改性沸石粉粉体材料扑粉 5. Modified zeolite powder powder material powder
a. 扑粉用混合粉体的制备 a. Preparation of powder for mixing powder
按照硬脂酸镁 1. 0%〜1 ] %， 沸石粉 89%〜99%的原料配比， 分别准确称取原料各组分， 混 合均匀， 研磨制粉， 控制粉体细度过 120目筛， 备用； According to the magnesium stearate 1.0%~1]%, the zeolite powder 89%~99% of the raw material ratio, accurately weigh the raw materials, mix evenly, grind the powder, control the fineness of the powder over 120 mesh Sieve, spare;
b. 扑粉涂层 b. Powder coating
将歩骤 a制备的混合粉体用量控制在每 1000 kg颗粒尿素扑粉 5〜15 kg ; The amount of mixed powder prepared in step a is controlled to 5~15 kg per 1000 kg of granular urea powder;
⑥ .筛分、 计量、 质量检验， 合格后包装， 制得适合于玉米种植施用的缓释复合肥料： 所 得产品颗粒外观圆润， 产品无异味； 6. Screening, metering, quality inspection, and post-qualification packaging, to produce a slow-release compound fertilizer suitable for corn planting application: the obtained product has a rounded appearance and no odor;
产品质量达到如下技术指标： Product quality meets the following technical indicators:
N元素含量 ％ ≡5 15
P2O5含量 % 5≥ 10 N element content% ≡5 15 P2O5 content% 5≥ 10
K20含量 ¾ 5； 10 K 2 0 content 3⁄4 5; 10
颗粒粒度 mm 2~4.75mm Particle size mm 2~4.75mm
水分含量 wt % 2.0 。 Moisture content wt % 2.0.
农作物生长除了需求 N、 P、 K营养元素以外， S、 Ca也是需求量较大而且是植物生成不 可缺少的营养元素。 硫是构成蛋白质的重要成份， 钙对植物种子的萌芽和器官的发育发挥着 不可替代的重要作用。 S、 Ca 元素进入复合肥料组分， 在作物生长、 防治病虫害和改良土壤 诸多方面都会产生积极效果。 In addition to the demand for N, P and K nutrients, S and Ca are also in great demand and are indispensable nutrients for plant production. Sulfur is an important component of protein. Calcium plays an irreplaceable role in plant seed germination and organ development. The S and Ca elements enter the compound fertilizer component and have positive effects in crop growth, pest control and soil improvement.
本发明的原料配方中的硫元素以可溶性硫酸盐的形式加入， 而且比例较大， 作物生长必 须的第四大营养元素， 为玉米直接提供硫养分。 配方混合磷肥中的磷灰石组份除了含有磷元 素外， 同时提供钙元素， 与原料配方中的其他组份， 配伍良好， 适合玉米生长。 对提高玉米 的产量和质量。 做出了贡献。 The sulfur element in the raw material formulation of the present invention is added in the form of soluble sulfate, and the proportion is large, and the fourth largest nutrient element necessary for crop growth provides direct supply of sulfur nutrients to the corn. The apatite component in the formula mixed phosphate fertilizer, in addition to the phosphorus element, also provides calcium, which is compatible with other components in the raw material formula and is suitable for corn growth. To increase the yield and quality of corn. Made a contribution.
本发明的目的还可以通过如下措施来达到： The object of the invention can also be achieved by the following measures:
本发明的适合于玉米种植施用的缓释复合肥料， 其特征在于 ώ如下按照质量份数计的原 料制成： The sustained-release compound fertilizer suitable for corn planting application of the present invention is characterized in that it is produced as follows in terms of parts by mass:
尿素 22〜35 Urea 22~35
硫酸铵 15〜30 Ammonium sulfate 15~30
硫酸钾 20〜35 Potassium sulfate 20~35
混合磷肥 2(！〜 35 Mixed phosphate fertilizer 2 (!~ 35
锌、 铁添加剂 0.1〜0.5 Zinc, iron additive 0.1~0.5
造粒助剂 7〜10 Granulation aids 7~10
水 适量 Water amount
其中： among them:
所述混合磷肥 ώ磷酸二铵、 钙镁磷肥与磷灰石粉复合而成， 其质量百分比例如下： 磷酸二铵 45 ~ 60 The mixed phosphate fertilizer, diammonium phosphate, calcium magnesium phosphate fertilizer and apatite powder are compounded, and the mass percentage thereof is as follows: diammonium phosphate 45 ~ 60
钙镁磷肥 15〜35 Calcium magnesium phosphate fertilizer 15~35
磷灰石粉 10〜： 。 是优选的技术方案 t 本发明的适合于玉米种植施 )Ή的缓释复合肥料， 其特征在于 如下按照质量份数计的原 料制成：
尿素 30 Apatite powder 10~:. T is the preferred technical solution for application to corn) Ή slow-release compound fertilizer of the present invention, characterized by the material is made in accordance with the fraction of the total mass: Urea 30
硫酸铵 10 Ammonium sulfate 10
硫酸钾 25 Potassium sulfate 25
混合磷肥 27 Mixed phosphate fertilizer 27
锌、 铁添加剂 0.5 Zinc, iron additive 0.5
造粒助剂 7.5 Granulation aids 7.5
水 适量 Water amount
其中： among them:
所述混合磷肥 ώ磷酸二铵、 钙镁磷肥与磷灰石粉复合而成， 其质量百分比例如下： 磷酸二铵 50 The mixed phosphate fertilizer is prepared by compounding diammonium phosphate, calcium magnesium phosphate fertilizer and apatite powder, and the mass percentage thereof is as follows: diammonium phosphate 50
钙镁磷肥 30 Calcium magnesium phosphate fertilizer 30
磷灰石粉 20。 Apatite powder 20.
是一个优选的技术方案。 It is a preferred technical solution.
本发明的适合于玉米种植施用的缓释复合肥料的施用方法，其特征在于开沟施 Τ地表以下， 底肥： 40〜60Kg/亩； 追肥： 30〜40 Kg/亩。 The method for applying the slow-release compound fertilizer suitable for corn planting application of the invention is characterized in that the ditch is applied below the surface, the bottom fertilizer: 40~60Kg/mu; the top dressing: 30~40 Kg/mu.
本发明的适合于玉米种植施用的缓释复合肥料， 相比现有技术由如下积极效果： The sustained-release compound fertilizer suitable for corn planting application of the present invention has the following positive effects compared to the prior art:
1 . 提供了一种营养全面， 缓释性能优异， 能充分满足玉米对养分的需求， 最大限度的发 挥肥料的效力， 既能提高玉米产量又能提高其品质、 即节约资源， 又保护环境的适合于玉米 种植施用的缓释复合肥料。 1. Provides a comprehensive nutrition and excellent sustained release performance, which can fully meet the nutrient demand of corn, maximize the effectiveness of fertilizer, improve corn yield and quality, save resources, and protect the environment. A slow release compound fertilizer suitable for corn planting applications.
2. 单层包膜， 生成工艺简单， 设备投资省， 生产成本低。 2. Single-layer coating, simple production process, low equipment investment and low production cost.
3. 包膜材料可以在土壤微生物作用下降解， 避免了包膜材料对土壤环境的污染。 3. The coating material can be degraded under the action of soil microorganisms, avoiding the pollution of the coating material to the soil environment.
4. 肥料中的主要营养元素配比合理， 原料配方中的硫元素以可溶性硫酸盐的形式加入， 而且比例较大， 作物生长必须的第四大营养元素， 为玉米直接提供硫养分。 肥效利用率高， 提高玉米的产量和质量。 4. The ratio of the main nutrient elements in the fertilizer is reasonable. The sulfur element in the raw material formula is added in the form of soluble sulfate, and the proportion is large. The fourth largest nutrient element necessary for crop growth provides direct supply of sulfur nutrients to the corn. High fertilizer efficiency, increasing corn yield and quality.
5. 采用低品位磷灰石作为肥料的原料。 节约宝贵的高品位磷矿资源。 同时保护环境。 5. Use low grade apatite as a raw material for fertilizer. Save valuable high-grade phosphate rock resources. Protect the environment at the same time.
6. 因不含氯离子， 用于玉米专用肥料， 具有增产增效的作用。 平均亩增产 4. 7%〜12. 3%。 具体实施方式 6. Because it does not contain chloride ions, it is used for corn-specific fertilizers, which has the effect of increasing production and increasing efficiency. The average yield per mu is 4.7%~12.3%. detailed description
本发明下而将结合实施例作进-一歩详述： The present invention will be further described in conjunction with the embodiments.
实施例 1 Example 1
按照如下歩骤制备本发明的适合于玉米种植施用的缓释复合肥料
其制备方法包括如下歩骤： The sustained-release compound fertilizer suitable for corn planting application of the invention is prepared according to the following steps The preparation method comprises the following steps:
① . 钾肥、 氮肥复合物的制备 1. Preparation of potassium fertilizer and nitrogen fertilizer complex
首先把尿素 30重量份加热熔融后， 加入硫酸铵 10重量份和硫酸钾 25重量份混合均匀， 制得含有钾、 硫、 铵的钾肥、 氮肥复合物， 备用； First, 30 parts by weight of urea is heated and melted, and then 10 parts by weight of ammonium sulfate and 25 parts by weight of potassium sulfate are added and uniformly mixed to prepare a potassium fertilizer and a nitrogen fertilizer compound containing potassium, sulfur and ammonium, and used;
② . 混合磷肥制备 2. Preparation of mixed phosphate fertilizer
a. 磷灰石粉的制备 a. Preparation of apatite powder
将含 P2O510%~20%磷灰石磨成粉， 磷灰石粉的细度控制 100目 ± 10， 备用； b. 混合 Grinding powder containing P 2 O 5 10%~20% apatite, the fineness of the apatite powder is controlled by 100 mesh ± 10, standby; b. mixing
将磷酸二钹 50重量份、 钙锾磷肥 30重量份与歩骤 a制备的磷灰石粉 20重量份混匀， 备 用； 50 parts by weight of bismuth phosphate, 30 parts by weight of calcium strontium phosphate, and 20 parts by weight of apatite powder prepared in a a, are prepared for use;
③ . 复合肥料各组分混合颗粒的制备 3. Preparation of mixed particles of various components of compound fertilizer
将歩骤①制备的钾肥、 氮肥复合物与歩骤②制备的混合磷肥 27重量份， 锌、 铁添加剂 0.5重量份混和均匀， 加入造粒剂 7. 5重量份， 水适量。 利用传统造粒机将所述复合肥料各组 分混合造粒， 备用； The potassium fertilizer and the nitrogen fertilizer composite prepared in the first step were mixed with 27 parts by weight of the mixed phosphate fertilizer prepared in the second step, and 0.5 parts by weight of the zinc and iron additives were uniformly mixed, and 7.5 parts by weight of the granulating agent was added thereto, and the amount of water was adjusted. The composite fertilizer components are mixed and granulated by a conventional granulator, and used;
④ .硬脂酸涂膜 4. Stearic acid coating
硬脂酸的用量为歩骤③制备的复合肥料各组分混合颗粒质量的 1. 0 %〜3. 0 %， 涂膜方法 如下： The amount of stearic acid is 1. 0%~3. 0 % of the mass of the mixed particles of the composite fertilizer prepared in the third step, and the coating method is as follows:
a. .熔融硬脂酸的制备 a. Preparation of molten stearic acid
包膜用硬脂酸经按照配方准确计量后， 投入硬脂酸熔融槽中， 加热至熔融状态， 备用； b. .包膜 After the coating is accurately metered with stearic acid according to the formula, it is put into the stearic acid melting tank and heated to the molten state for use; b. .
按照配方准确计量-步骤③制备的复合肥料各组分混合颗粒，用歩骤 a制备的熔融硬脂酸， 在滚筒式混合造粒机中进行颗粒外喷涂， 使混合颗粒外表面形成尽可能均匀的涂层， 热风干 燥、 室温风冷却， 备用； 工艺条件如下： According to the formula, the particles of the composite fertilizer prepared in step 3 are mixed, and the molten stearic acid prepared in the step a is sprayed in the drum type mixing granulator to make the outer surface of the mixed particles as uniform as possible. Coating, hot air drying, room temperature air cooling, standby; process conditions are as follows:
热 W干燥温度不高于 80Γ Heat W drying temperature is not higher than 80Γ
冷却气流温度不高于 50°C ; The cooling air temperature is not higher than 50 ° C ;
⑤ . 改性沸石粉粉体材料扑粉 5. Modified zeolite powder powder material powder
a. 扑粉用混合粉体的制备 a. Preparation of powder for mixing powder
按照硬脂酸镁 1. 0%~ 1 1 ¾， 沸石粉 89%〜99%的原料配比， 分别准确称取原料各组分， 混 合均匀， 研磨制粉， 控制粉体细度过 120目筛， 备用； According to the magnesium stearate 1.0%~1 1 3⁄4, the zeolite powder 89%~99% of the raw material ratio, accurately weigh the raw materials, mix evenly, grind the powder, control the fineness of the powder over 120 mesh Sieve, spare;
b. 扑粉涂层 b. Powder coating
将 []骤 a制备的混合粉体用量控制在每 1000 kg颗粒尿素扑粉 5〜15 kg:
⑥.筛分、 计量、 质量检验， 合格后包装， 制得适合于: κ米种植施用的缓释复合肥料： 所 得产品颗粒外观圆润， 产品无异味； The amount of mixed powder prepared in [a] a is controlled at 5 to 15 kg per 1000 kg of granular urea powder: 6. Screening, metering, quality inspection, and post-qualification packaging, suitable for: κ rice planting application of slow-release compound fertilizer: The obtained product particles have a rounded appearance and no odor;
产品质量达到如下技术指标： Product quality meets the following technical indicators:
N元素含量 ％ 15 N element content % 15
P205含量 % 5≥ 10 P 2 0 5 content% 5≥ 10
κ2ο含量 ％ ^ 10 κ 2 οContent% ^ 10
颗粒粒度 mm 2—4.75mm Particle size mm 2 - 4.75mm
水分含量 wt% 2.0 。 Moisture content wt% 2.0.
实施例 2〜实施例 7 Embodiment 2 to Embodiment 7
按照实施例 1的方法和歩骤， 按照表 1 的原料配方制备本发明的适合于玉米种植施用的 缓释复合肥 According to the method and the procedure of Example 1, the slow-release compound fertilizer suitable for corn planting application of the present invention is prepared according to the raw material formula of Table 1.
表 1 Table 1
制得适合于玉米种植施用的缓释复合肥料； 所得产品颗粒外观圆润， Producing a slow-release compound fertilizer suitable for corn planting; the obtained product particles have a rounded appearance,
产品质量达到如下技术指标： Product quality meets the following technical indicators:
元素含】匱 % 5；15 The element contains 匮 % 5;15
p2o5含量 % ≡5 10 p 2 o 5 content% ≡5 10
K20含量 % 5Ϊ 10 K 2 0 content% 5Ϊ 10
颗粒粒度 mm 2— 4.75mm Particle size mm 2 - 4.75mm
水分含量 wt 2.0 。
Moisture content wt 2.0.
Claims
权 利 要 求 书 种适合于玉米种植施用的缓释复合肥料， 其特征在于山如下按照质量份数计的原料 制成: 硫酸钹 The invention relates to a slow-release compound fertilizer suitable for corn planting, which is characterized in that the mountain is made of the following raw materials in parts by mass: barium sulfate
硫酸钾 Potassium sulfate
混合磷肥 Mixed phosphate fertilizer
锌、 铁添加剂
Zinc, iron additive
造粒助剂 Granulation aid
水 Water
其中: among them:
所述混合磷肥由磷酸二铵、 钙镁磷肥与磷灰石粉 75 . - I复合而成， 其质量百分比例如下： The mixed phosphate fertilizer is compounded by diammonium phosphate, calcium magnesium phosphate fertilizer and apatite powder 75 . - I, and the mass percentage thereof is as follows:
5 ^ 5 ^
磷酸二铵 45〜60 Diammonium phosphate 45~60
ο 4 ο 5 ο 4 ο 5
钙镁磷肥 15〜35 5 Calcium magnesium phosphate fertilizer 15~35 5
磷灰石粉 10〜： 35 所述磷灰石粉是 P205含量在 10%〜20°/。之间的低品位磷矿粉； Apatite powder 10~: 35 The apatite powder has a P 2 0 5 content of 10% to 20°/. Low grade phosphate rock between;
所述造粒助剂 70%-85%的膨润土和 30%- 15%的铝矾土粉混合组成； The granulation aid is composed of 70%-85% bentonite and 30%-15% bauxite powder;
其制备方法包括如下歩骤： The preparation method comprises the following steps:
① . 钾肥、 氮肥复合物的制备 1. Preparation of potassium fertilizer and nitrogen fertilizer complex
首先把尿素 30〜45重量份加热熔融后， 加入硫酸铵 3〜40重量份和硫酸钾 20〜35重量 份混合均匀， 制得含有钾、 硫、 铵的钾肥、 氮肥复合物， 备用； First, 30 to 45 parts by weight of urea is heated and melted, and then 3 to 40 parts by weight of ammonium sulfate and 20 to 35 parts by weight of potassium sulfate are added and mixed uniformly to prepare a potassium fertilizer and a nitrogen fertilizer compound containing potassium, sulfur and ammonium, and used;
② . 混合磷肥制备 2. Preparation of mixed phosphate fertilizer
a. 磷灰石粉的制备 a. Preparation of apatite powder
将含 P2O510%〜20%磷灰石磨成粉， 磷灰石粉的细度控制 100目 ± 10， 备用； b. 混合 Grinding powder containing P 2 O 5 10%~20% apatite, the fineness of the apatite powder is controlled by 100 mesh ± 10, standby; b. mixing
将磷酸二铵 45〜60重量份、钙镁磷肥】5〜35重量份与歩骤 a制备的磷灰石粉 10〜35重 量份混匀， 备用； Mixing 45 to 60 parts by weight of diammonium phosphate, 5 to 35 parts by weight of calcium magnesium phosphate, and 10 to 35 parts by weight of the apatite powder prepared in step a, and set aside;
③ . 复合肥料各组分混合颗粒的制备 3. Preparation of mixed particles of various components of compound fertilizer
将歩骤①制备的钾肥、 氮肥复合物与歩骤②制备的混合磷肥 1 5〜35電量份， 锌、 铁添加 剂 0.1〜0.5重量份混和均匀， 加入造粒剂 7〜1 0重量份， 水适量。 利用传统造粒机将所述复 合肥料各组分混合造粒， 备 ffl：
权 利 要 求 书 The potassium fertilizer and the nitrogen fertilizer complex prepared in the first step are mixed with the mixed phosphate fertilizer prepared in the step 2, and the mixture of the zinc and iron additives is 0.1 to 0.5 parts by weight, and the granulating agent is added in an amount of 7 to 10 parts by weight. Moderate amount. Mixing and granulating the components of the composite fertilizer with a conventional granulator, preparing ffl: Claim
④ .硬脂酸涂膜 4. Stearic acid coating
硬脂酸的用量为歩骤③制备的复合肥料各组分混合颗粒质量的 1. 0 %〜3. 0 % , 涂膜方法 如下： The amount of stearic acid is 1. 0%~3. 0 % of the mass of the mixed particles of the composite fertilizer prepared in the third step, and the coating method is as follows:
a. .熔融硬脂酸的制备 a. Preparation of molten stearic acid
包膜用硬脂酸经按照配方准确计量后， 投入硬脂酸熔融槽中， 加热至熔融状态， 备用； b. .包膜 After the coating is accurately metered with stearic acid according to the formula, it is put into the stearic acid melting tank and heated to the molten state for use; b. .
按照配方准确计量 骤③制备的复合肥料各组分混合颗粒，用歩骤 a制备的熔融硬脂酸， 在滚筒式混合造粒机中进行颗粒外喷涂， 使混合颗粒外表面形成尽可能均匀的涂层， 热) A干 燥、 室温风冷却， 备用； 工艺条件如下： According to the formula, the mixed particles of the composite fertilizer prepared in step 3 are accurately measured, and the molten stearic acid prepared in the step a is sprayed in the drum type mixing granulator to make the outer surface of the mixed particles as uniform as possible. Coating, hot) A dry, room temperature air cooled, spare; process conditions are as follows:
热风干燥温度不高于 80Ό Hot air drying temperature is not higher than 80Ό
冷却气流温度不高于 50°C ; The cooling air temperature is not higher than 50 ° C ;
⑤ . 改性沸石粉粉体材料扑粉 5. Modified zeolite powder powder material powder
a. 扑粉用混合粉体的制备 a. Preparation of powder for mixing powder
按照硬脂酸镁 1. 0%〜1 1%， 沸石粉 89¾〜99¾的原料配比， 分别准确称取原料各组分， 混 合均匀， 研磨制粉， 控制粉体细度过 120目筛， 备用： According to the magnesium stearate 1.0%~1 1%, the zeolite powder 893⁄4~993⁄4 raw material ratio, accurately weigh the raw materials, mix evenly, grind the powder, control the fineness of the powder over 120 mesh sieve, Alternate:
b. 扑粉涂层 b. Powder coating
将歩骤 a制备的混合粉体用量控制在每 1000 kg颗粒尿素扑粉 5〜15 kg; The amount of the mixed powder prepared in step a is controlled to 5 to 15 kg per 1000 kg of granular urea powder;
⑥ .筛分、 计量、 质量检验， 合格后包装， 制得适合于玉米种植施用的缓释复合肥料； 所 得产品颗粒外观圆润， 产品无异味； 6. Screening, metering, quality inspection, and post-qualification packaging, to produce a slow-release compound fertilizer suitable for corn planting; the obtained product has a rounded appearance and no odor;
产品质量达到如下技术指标： Product quality meets the following technical indicators:
N元素含量 ％ 5： 15 N element content % 5: 15
P2<¾含量 ％ ^ 10 P2<3⁄4 content % ^ 10
K20含量 ％ 5? 10 K 2 0 content% 5? 10
颗粒粒度 mm 2—4.75mm Particle size mm 2 - 4.75mm
水分含量 wt% ίξ 2.0 。 Moisture content wt% ίξ 2.0.
2. 根据权利要求 1的适合于玉米种植施 ffl的缓释复合肥料， 其特征在于由如下按照质量 份数计的原料制成： A sustained-release compound fertilizer suitable for corn planting according to claim 1, which is characterized by being made of the following raw materials in parts by mass:
尿素 22〜35 Urea 22~35
硫酸铵 15〜30 Ammonium sulfate 15~30
硫酸钾 2(卜 35 Potassium sulfate 2 (Bu 35
混合磷肥 2()〜35
权 利 要 求 书 Mixed phosphate fertilizer 2 () ~ 35 Claim
锌、 铁添加剂 0.卜 0-5 Zinc, iron additive 0. Bu 0-5
造粒助剂 7〜10 Granulation aids 7~10
水 适量 Water amount
其中： among them:
所述混合磷肥 ώ磷酸二铵 钙镁磷肥与磷灰石粉复合而成， 其质量百分比例如下: 磷酸二铵 45〜60 The mixed phosphate fertilizer, diammonium phosphate, calcium magnesium phosphate fertilizer and apatite powder are compounded, and the mass percentage thereof is as follows: diammonium phosphate 45~60
钙镁磷肥 15 ~35 Calcium magnesium phosphate fertilizer 15 ~ 35
磷灰石粉 10〜： 35。 Apatite powder 10~: 35.
3. 根据权利要求 1的适合于玉米种植施用的缓释复合肥料， 其特征在于由如下按照质 i 份数计的原料制成： 3. A slow release compound fertilizer suitable for corn planting application according to claim 1, characterized in that it is made of the following raw materials in terms of mass:
尿素 30 Urea 30
硫酸铵 10 Ammonium sulfate 10
硫酸钾 25 Potassium sulfate 25
混合磷肥 27 Mixed phosphate fertilizer 27
锌、 铁添加剂 0.5 Zinc, iron additive 0.5
造粒助剂 7.5 Granulation aids 7.5
水 适】 Water suitable
其中： among them:
所述混合磷肥 ώ磷酸二铵、 钙镁磷肥与磷灰石粉复合而成， 其质量百分比例如下： 磷酸二铵 50 The mixed phosphate fertilizer is prepared by compounding diammonium phosphate, calcium magnesium phosphate fertilizer and apatite powder, and the mass percentage thereof is as follows: diammonium phosphate 50
钙镁磷肥 30 Calcium magnesium phosphate fertilizer 30
磷灰石粉 20。 Apatite powder 20.
4. 一种权利要求 1的适合于玉米种植施用的缓释复合肥料的施用方法，其特征在于开沟 施丁-地表以下， 底肥： 40〜60Kg/亩； 追肥： 30〜40 Kg/亩。
4. A method for applying a slow-release compound fertilizer suitable for corn planting application according to claim 1, characterized in that the ditch is below the surface, the bottom fertilizer is: 40 to 60 kg/mu; and the top dressing is 30 to 40 Kg/mu.
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| CN103058754B (en) * | 2012-12-26 | 2015-04-22 | 施可丰化工股份有限公司 | Slow-release compound fertilizer applicable to plantation of corn |
| CN103460876B (en) * | 2013-09-24 | 2015-10-28 | 云南省农业科学院质量标准与检测技术研究所 | The application process that on a kind of Low Latitude Plateau Area corn, High Efficient nitrogen utilizes |
| CN103636339B (en) * | 2013-12-16 | 2015-09-16 | 西南大学 | The fertilizing method of corn |
| CN103755483B (en) * | 2014-02-18 | 2016-01-20 | 孟庆华 | A kind of Special controlled-release fertilizer for summer maize and production method thereof |
| CN107382626A (en) * | 2017-08-28 | 2017-11-24 | 吉林农业大学 | A kind of special gravel fertilizer of corn and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101177365A (en) * | 2007-11-01 | 2008-05-14 | 山东农业大学 | Long-acting special controlled release fertilizer for corn and preparation method thereof |
| CN102093144A (en) * | 2011-01-19 | 2011-06-15 | 施可丰化工股份有限公司 | Biodegradable coated urea |
| CN102241534A (en) * | 2010-05-15 | 2011-11-16 | 夏道广 | Composite fertilizer and preparation method thereof |
| CN102432374A (en) * | 2011-09-02 | 2012-05-02 | 史丹利化肥股份有限公司 | Melt biomass composite potassium sulfate type slow-release fertilizer and preparation method thereof |
| CN103058754A (en) * | 2012-12-26 | 2013-04-24 | 施可丰化工股份有限公司 | Slow-release compound fertilizer applicable to plantation of corn |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101177365A (en) * | 2007-11-01 | 2008-05-14 | 山东农业大学 | Long-acting special controlled release fertilizer for corn and preparation method thereof |
| CN102241534A (en) * | 2010-05-15 | 2011-11-16 | 夏道广 | Composite fertilizer and preparation method thereof |
| CN102093144A (en) * | 2011-01-19 | 2011-06-15 | 施可丰化工股份有限公司 | Biodegradable coated urea |
| CN102432374A (en) * | 2011-09-02 | 2012-05-02 | 史丹利化肥股份有限公司 | Melt biomass composite potassium sulfate type slow-release fertilizer and preparation method thereof |
| CN103058754A (en) * | 2012-12-26 | 2013-04-24 | 施可丰化工股份有限公司 | Slow-release compound fertilizer applicable to plantation of corn |
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