CN103011986B - Compound calcium magnesium phosphate fertilizer - Google Patents
Compound calcium magnesium phosphate fertilizer Download PDFInfo
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- CN103011986B CN103011986B CN201310011621.5A CN201310011621A CN103011986B CN 103011986 B CN103011986 B CN 103011986B CN 201310011621 A CN201310011621 A CN 201310011621A CN 103011986 B CN103011986 B CN 103011986B
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Abstract
The invention relates to a compound calcium magnesium phosphate fertilizer which is prepared by adding porphyritic monzonitic granite or medical stone, sodium humate or humic acid, urea, sodium polyacrylate, polyaspartic acid and the balance of rare earth nitrate based on the existing calcium magnesium phosphate fertilizer. The calcium magnesium phosphate fertilizer provided by the invention has complete nutrients, multiple functions, high comprehensive fertilizer effect and high yield-increasing potential, can improve the physical and chemical state of soil, combines quick action and slow action and realizes integrated water/fertilizer regulation and control.
Description
Technical field
The present invention relates to a kind of compound calcium magnesium-phosphorus fertilizer that is applicable to farm crop.
Background technology
China is one of country of fertilizer amount maximum, the cultivated area that accounts for the whole world 8% but uses approximately 30% chemical fertilizer amount, due to excessive or irrational partially to fertilize, cause nutritive props imbalance in soil, input-output ratio declines, strengthen production cost, agricultural-food decline, soil compaction aggravation, beneficial microorganism group is by subtracting, too much consumption chemical fertilizer raw material resource and the energy, loss of chemical fertilizer has caused surface water oxygen enrichment, Nitrate content in ground water raises, agroecological environment worsens, affect the problems such as people's physical and mental health and caused the concern of relevant department and the whole society.
Food quality and safety is divided into pollution-free food by standard according to international food quality and security, and green food and Organic food, according to the standard of China's food quality and safety, are divided into pollution-free food by food quality and safety.A level (secondary) green food, AA level (one-level is international Organic food) green food.Aspect Fertilizer application, produce A level (secondary) green food, allow to use on a small quantity or partly use chemical fertilizer as urea, monoammonium phosphate, diammonium phosphate, potassium sulfate, production AA level (one-level) green food, the inaccurate chemical fertilizer that uses any synthetic, can only manure use material, bio-feritlizer and some natural mineral fertilizer.
Compound calcium magnesium-phosphorus fertilizer of the present invention is to solve the required nutritional requirement of crop by using mineral manure, substitute and reduce the consumption of chemical fertilizer, by the slowly-releasing regulation and control factor in product, control the release rate of fertilizer, slow down because dissolving and run off and lost efficacy by soil fixing fast, make nutritive element can require to accomplish according to the need of crop are fertile " release as required " or " supply as required ", thereby overcome the contradiction that fertilizer dissolves fast and crop slowly absorbs, improve the utilization ratio of fertilizer, reduce number of dropouts, alleviate the pollution of water source edatope, meet the requirement of energy-saving and emission-reduction environmental protection.
Summary of the invention:
The object of the invention is to provide a kind of compound calcium magnesium-phosphorus fertilizer, on the basis of existing fused(calcium magnesium)phosphate, to have added porphyritic monzonitic granite or medical stone, Sodium salts humic acids or humic acids, urea, sodium polyacrylate, poly-aspartic-acid, rare earth nitrate surplus is made, this compound calcium magnesium-phosphorus fertilizer is that a kind of nutrition is complete, function is many, and comprehensive fertility is high, and yield potential is large, can improve soil physical and chemical property, alleviate soil compaction, increase soil fertility, purify edatope, quick-actingly combine with slow, the integrated fertilizer variety of water-fertilizer conditioning.
A kind of compound calcium magnesium-phosphorus fertilizer of the present invention, by feed composition weight percent fused(calcium magnesium)phosphate 15-70%, porphyritic monzonitic granite or medical stone 10-25%, Sodium salts humic acids or humic acids 5-20%, urea 5-15%, sodium polyacrylate 5-15%, poly-aspartic-acid 1-6%, rare earth nitrate surplus is made.
Described compound calcium magnesium-phosphorus fertilizer is by feed composition weight percent fused(calcium magnesium)phosphate 30-55%, porphyritic monzonitic granite or medical stone 15-25%, Sodium salts humic acids or humic acids 10-15%, urea 10-15%, sodium polyacrylate 6-9%, poly-aspartic-acid 2-4%, rare earth nitrate surplus is made.
Described compound calcium magnesium-phosphorus fertilizer is by feed composition weight percent fused(calcium magnesium)phosphate 32-50%, porphyritic monzonitic granite or medical stone 15-20%, Sodium salts humic acids or humic acids 15-20%, urea 5-10%, sodium polyacrylate 7-8%, poly-aspartic-acid 3-5%, rare earth nitrate surplus is made.
The preparation method of described compound calcium magnesium-phosphorus fertilizer, follows these steps to carry out:
A, raw material porphyritic monzonitic granite or medical stone powder are broken to 120 mesh sieves, for subsequent use;
B, fused(calcium magnesium)phosphate, Sodium salts humic acids or humic acids, urea, sodium polyacrylate, poly-aspartic-acid and rare earth nitrate are crushed to respectively to 80 mesh sieves, for subsequent use;
C, each raw material after step a and step b are pulverized are placed in agitator and are stirred by weight, then carry out according to a conventional method granulation and make compound calcium magnesium-phosphorus fertilizer, packaging.
A kind of compound calcium magnesium-phosphorus fertilizer of the present invention, the feature of this compound calcium magnesium-phosphorus fertilizer is:
Nutrition is complete: the fused(calcium magnesium)phosphate itself in compound calcium magnesium-phosphorus fertilizer is exactly---fertilizer variety, contain the elements such as calcium magnesium phosphorus silicon and a small amount of iron, chlorine, fluorine, in porphyritic monzonitic granite in product or medical stone, all contain phosphorus, potassium, calcium, magnesium, iron, copper, manganese, zinc, molybdenum, boron, silicon, selenium, iodine, titanium, cobalt, vanadium, aluminium, sodium, nickel, strontium and lanthanide series rare-earth elements, also add urea simultaneously;
Function is many: the rare earth element that is commonly called as " agriculture VITAMIN " in (1) a kind of compound calcium magnesium-phosphorus fertilizer of the present invention and Sodium salts humic acids or the humic acids that contains various active gene, can improve physiologically active and Nutrition and Metabolism function in plant body, the activity of regulatory enzyme, make plant strain growth stalwartness, well developed root system, strengthen immunological competence, delay senility;
(2) can improve utilization rate of fertilizer: the poly-aspartic-acid in a kind of compound calcium magnesium-phosphorus fertilizer of the present invention, Sodium salts humic acids or humic acids, porphyritic monzonitic granite or medical stone (SiO
-, SiO
4) have ion-exchange, absorption and huge legendary turtle cooperation to use to nutritive element, nutritive element in can enrichment fertilizer, and be stored up, according to crop regulation of fertilizer requirement, really accomplish " discharging as required " or " supply as required ", overcome the slowly contradiction of absorption of the quick loss by dissolution of fertilizer and crop, increased operation rate, reduced number of dropouts;
(3) strengthen plant and carry anti-adversity ability: the porphyritic monzonitic granite in a kind of compound calcium magnesium-phosphorus fertilizer of the present invention or the element silicon in medical stone, can make plant epidermic cell silicidize and stratum corneum thicken, improve anti-natural calamity--resistant to lodging, Resistant endangers, drought-resistant, low temperature resistant, Salt And Alkali Tolerance ability; Sodium salts humic acids or humic acids and rare earth element can be plant strain growth stalwartnesses, strengthen anti-(resistance to) sick ability;
(4) improvement soil, purification edatope: the solid-state phosphorus potassium element in the porphyritic monzonitic granite in a kind of compound calcium magnesium-phosphorus fertilizer of the present invention or the element silicon energy activating soil of medical stone and fused(calcium magnesium)phosphate, silico-calcium element can increase soil aggregate, alleviate soil compaction, can degrade remains of pesticide and harmful metal pollution in soil, element silicon can regulate nutrient balance supply, energy dual modulation soil acidity or alkalinity, Sodium salts humic acids or humic acids and poly-aspartic-acid are to increasing soil aggregate, and improvement physicochemical character has good effect;
(5) drought-resistant ability is strong: the humic acids in a kind of compound calcium magnesium-phosphorus fertilizer of the present invention is the chief component of promoting product Handilong drought resistance agent; Sodium polyacrylate water suction water-holding capacity is strong, is a kind of desirable drought resistance agent; Stomatal movement on element silicon energy adjusting vane in porphyritic monzonitic granite or medical stone, in control volume, moisture evaporation, improves drought-resistant ability, can make loosing soil, improves water-holding capacity, alleviates arid;
(6) improve output, improve quality: the porphyritic monzonitic granite in a kind of compound calcium magnesium-phosphorus fertilizer of the present invention or the element silicon in medical stone can make plant branches and leaves angle diminish, blade thickness, leaf area increases, improve luminous energy, the particularly scattering efficiency of light energy utilization, strengthens photosynthesis, increases photosynthate; Poly-aspartic-acid and humic acids can promote well developed root system, strengthen root system activity and catheter, improve the absorption to nutrient and moisture and carry turn-over capacity, promote accumulation and the storage of photosynthesis and photosynthate.
Embodiment
Embodiment 1(weight percent)
A, raw material porphyritic monzonitic granite 10% is crushed to 120 mesh sieves, for subsequent use;
B, fused(calcium magnesium)phosphate 70%, Sodium salts humic acids 5%, urea 5%, sodium polyacrylate 5%, poly-aspartic-acid 1% and rare earth nitrate surplus are crushed to respectively to 80 mesh sieves, for subsequent use;
C, each raw material after step a and step b are pulverized are placed in agitator and are stirred by weight, then carry out according to a conventional method granulation and make compound calcium magnesium-phosphorus fertilizer, packaging.
Embodiment 2(weight percent)
A, raw material medical stone 25% is crushed to 120 mesh sieves, for subsequent use;
B, fused(calcium magnesium)phosphate 15%, humic acids 20%, urea 15%, sodium polyacrylate 15%, poly-aspartic-acid 6% and rare earth nitrate surplus are crushed to respectively to 80 mesh sieves, for subsequent use;
C, each raw material after step a and step b are pulverized are placed in agitator and are stirred by weight, then carry out according to a conventional method granulation and make compound calcium magnesium-phosphorus fertilizer, packaging.
Embodiment 3(weight percent)
A, raw material porphyritic monzonitic granite 20% is crushed to 120 mesh sieves, for subsequent use;
B, fused(calcium magnesium)phosphate 40%, Sodium salts humic acids 13%, urea 10%, sodium polyacrylate 10%, poly-aspartic-acid 4% and rare earth nitrate surplus are crushed to respectively to 80 mesh sieves, for subsequent use;
C, each raw material after step a and step b are pulverized are placed in agitator and are stirred by weight, then carry out according to a conventional method granulation and make compound calcium magnesium-phosphorus fertilizer, packaging.
Embodiment 4(weight percent)
A, raw material medical stone 15% is crushed to 120 mesh sieves, for subsequent use;
B, fused(calcium magnesium)phosphate 55%, humic acids 10%, urea 10%, sodium polyacrylate 6%, poly-aspartic-acid 2% and rare earth nitrate surplus are crushed to respectively to 80 mesh sieves, for subsequent use;
C, each raw material after step a and step b are pulverized are placed in agitator and are stirred by weight, then carry out according to a conventional method granulation and make compound calcium magnesium-phosphorus fertilizer, packaging.
Embodiment 5(weight percent)
A, raw material porphyritic monzonitic granite 18% is crushed to 120 mesh sieves, for subsequent use;
B, fused(calcium magnesium)phosphate 42%, Sodium salts humic acids 12%, urea 12%, sodium polyacrylate 7%, poly-aspartic-acid 3% and rare earth nitrate surplus are crushed to respectively to 80 mesh sieves, for subsequent use;
C, each raw material after step a and step b are pulverized are placed in agitator and are stirred by weight, then carry out according to a conventional method granulation and make compound calcium magnesium-phosphorus fertilizer, packaging.
Embodiment 6(weight percent)
A, raw material medical stone 25% is crushed to 120 mesh sieves, for subsequent use;
B, fused(calcium magnesium)phosphate 30%, Sodium salts humic acids 15%, urea 15%, sodium polyacrylate 9%, poly-aspartic-acid 3% and rare earth nitrate surplus are crushed to respectively to 80 mesh sieves, for subsequent use;
C, each raw material after step a and step b are pulverized are placed in agitator and are stirred by weight, then carry out according to a conventional method granulation and make compound calcium magnesium-phosphorus fertilizer, packaging.
Embodiment 7(weight percent)
A, raw material porphyritic monzonitic granite 15% is crushed to 120 mesh sieves, for subsequent use;
B, fused(calcium magnesium)phosphate 50%, humic acids 15%, urea 5%, sodium polyacrylate 10%, poly-aspartic-acid 3% and rare earth nitrate surplus are crushed to respectively to 80 mesh sieves, for subsequent use;
C, each raw material after step a and step b are pulverized are placed in agitator and are stirred by weight, then carry out according to a conventional method granulation and make compound calcium magnesium-phosphorus fertilizer, packaging.
Embodiment 8(weight percent)
A, raw material porphyritic monzonitic granite 22% is crushed to 120 mesh sieves, for subsequent use;
B, fused(calcium magnesium)phosphate 32%, Sodium salts humic acids 20%, urea 10%, sodium polyacrylate 8% poly-aspartic-acid 5% and rare earth nitrate surplus are crushed to respectively to 80 mesh sieves, for subsequent use;
C, each raw material after step a and step b are pulverized are placed in agitator and are stirred by weight, then carry out according to a conventional method granulation and make compound calcium magnesium-phosphorus fertilizer, packaging.
Embodiment 9(weight percent)
A, raw material medical stone 17% is crushed to 120 mesh sieves, for subsequent use;
B, fused(calcium magnesium)phosphate 45%, Sodium salts humic acids 18%, urea 8%, sodium polyacrylate 7%, poly-aspartic-acid 4% and rare earth nitrate surplus are crushed to respectively to 80 mesh sieves, for subsequent use;
C, each raw material after step a and step b are pulverized are placed in agitator and are stirred by weight, then carry out according to a conventional method granulation and make compound calcium magnesium-phosphorus fertilizer, packaging.
A kind of compound calcium magnesium-phosphorus fertilizer of the present invention, this compound calcium magnesium-phosphorus fertilizer and existing fused(calcium magnesium)phosphate and the synopsis of 45% Chemical Mixed Fertilizer to wheat yield:
Table: compound calcium magnesium-phosphorus fertilizer and conventional fertile simultaneous test (the community area 30m to wheat yield
2)
Note: 1.5 yuan/kilogram, fused(calcium magnesium)phosphate, 2.4 yuan/kilogram of compound calcium magnesium-phosphorus fertilizers, 3.5 yuan/kilogram of Chemical Mixed Fertilizers.
Claims (1)
1. the preparation method of a compound calcium magnesium-phosphorus fertilizer, it is characterized in that by feed composition weight percent fused(calcium magnesium)phosphate 15-70%, porphyritic monzonitic granite or medical stone 10-25%, Sodium salts humic acids or humic acids 5-20%, urea 5-15%, sodium polyacrylate 5-15%, poly-aspartic-acid 1-6%, rare earth nitrate surplus is made, and concrete operations follow these steps to carry out:
A, raw material porphyritic monzonitic granite or medical stone powder are broken to 120 mesh sieves, for subsequent use;
B, fused(calcium magnesium)phosphate, Sodium salts humic acids or humic acids, urea, sodium polyacrylate, poly-aspartic-acid and rare earth nitrate are crushed to respectively to 80 mesh sieves, for subsequent use;
C, each raw material after step a and step b are pulverized are placed in agitator and are stirred by weight, then carry out according to a conventional method granulation and make compound calcium magnesium-phosphorus fertilizer, packaging.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310011621.5A CN103011986B (en) | 2013-01-11 | 2013-01-11 | Compound calcium magnesium phosphate fertilizer |
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| CN201310011621.5A CN103011986B (en) | 2013-01-11 | 2013-01-11 | Compound calcium magnesium phosphate fertilizer |
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| CN103011986A CN103011986A (en) | 2013-04-03 |
| CN103011986B true CN103011986B (en) | 2014-10-15 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103804087B (en) * | 2014-02-14 | 2015-03-18 | 成都新柯力化工科技有限公司 | Mineral additive for water-soluble fertilizer |
| CN104030808B (en) * | 2014-06-05 | 2016-08-24 | 深圳市芭田生态工程股份有限公司 | A kind of durable action composition and the method preparing water-soluble controlled availability fertilizer with durable action composition |
| CN104478615B (en) * | 2014-12-25 | 2017-05-10 | 安徽帝元生物科技有限公司 | Wheat compound fertilizer and preparation method thereof |
| CN105131961A (en) * | 2015-07-15 | 2015-12-09 | 中国科学院地理科学与资源研究所 | Composite improvement agent, preparation method and application thereof |
| CN105175188B (en) * | 2015-09-24 | 2018-12-28 | 辽宁普天科技有限公司 | A kind of preparation method of fulvic acid calcium and magnesium fertilizer |
| CN106146222A (en) * | 2016-08-09 | 2016-11-23 | 山东农大肥业科技有限公司 | A kind of alkaline compound fertilizer material and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1096778A (en) * | 1993-06-23 | 1994-12-28 | 罗力 | A kind of slowly-releasing super-multicomponent fertilizer |
| CN1569758A (en) * | 2003-07-26 | 2005-01-26 | 朱绍林 | Organic slow-release fertilizer additive |
| CN102153416A (en) * | 2011-05-16 | 2011-08-17 | 江西省农业科学院土壤肥料与资源环境研究所 | Special root-inducing slow release high-efficiency fertilizer for double cropping rice and preparation method thereof |
| CN102515976A (en) * | 2011-12-27 | 2012-06-27 | 中国水稻研究所 | Soil dressing plug seedling raising matrix for rice, and seedling raising method thereof |
| CN102557798A (en) * | 2011-12-31 | 2012-07-11 | 山东宝源生物有限公司 | Organic-inorganic compound fertilizer added with SOD (Super Oxygen Dehydrogenise) analogue and production method thereof |
| CN102627514A (en) * | 2012-04-27 | 2012-08-08 | 深圳市芭田生态工程股份有限公司 | Soil-acidification-resistant organic fertilizer additive and preparation method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1478763B (en) * | 2002-08-27 | 2011-05-11 | 武兴战 | High activity antidraught nutrient and its making method |
| CN101134691A (en) * | 2006-08-29 | 2008-03-05 | 李彬 | Wheat special-purpose fertilizer |
| CN101116448A (en) * | 2007-09-02 | 2008-02-06 | 丁肇珊 | Protecting element for resisting drought, preventing disease, detoxicating and improving the growth of the plant |
| CN101973811B (en) * | 2010-10-08 | 2013-03-27 | 谢浩 | Multielement compound fertilizer |
-
2013
- 2013-01-11 CN CN201310011621.5A patent/CN103011986B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1096778A (en) * | 1993-06-23 | 1994-12-28 | 罗力 | A kind of slowly-releasing super-multicomponent fertilizer |
| CN1569758A (en) * | 2003-07-26 | 2005-01-26 | 朱绍林 | Organic slow-release fertilizer additive |
| CN102153416A (en) * | 2011-05-16 | 2011-08-17 | 江西省农业科学院土壤肥料与资源环境研究所 | Special root-inducing slow release high-efficiency fertilizer for double cropping rice and preparation method thereof |
| CN102515976A (en) * | 2011-12-27 | 2012-06-27 | 中国水稻研究所 | Soil dressing plug seedling raising matrix for rice, and seedling raising method thereof |
| CN102557798A (en) * | 2011-12-31 | 2012-07-11 | 山东宝源生物有限公司 | Organic-inorganic compound fertilizer added with SOD (Super Oxygen Dehydrogenise) analogue and production method thereof |
| CN102627514A (en) * | 2012-04-27 | 2012-08-08 | 深圳市芭田生态工程股份有限公司 | Soil-acidification-resistant organic fertilizer additive and preparation method thereof |
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Application publication date: 20130403 Assignee: Guizhou Jinghuarui Agricultural Science and Technology Co., Ltd. Assignor: Yang Wanshan Contract record no.: 2015520000032 Denomination of invention: Compound calcium magnesium phosphate fertilizer Granted publication date: 20141015 License type: Exclusive License Record date: 20151119 |
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