CN106518193A - Zinc-rich organic fertilizer - Google Patents
Zinc-rich organic fertilizer Download PDFInfo
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- CN106518193A CN106518193A CN201710012726.0A CN201710012726A CN106518193A CN 106518193 A CN106518193 A CN 106518193A CN 201710012726 A CN201710012726 A CN 201710012726A CN 106518193 A CN106518193 A CN 106518193A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F1/00—Fertilisers made from animal corpses, or parts thereof
- C05F1/002—Fertilisers made from animal corpses, or parts thereof from fish or from fish-wastes
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
-
- 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
- C05G5/20—Liquid fertilisers
- C05G5/23—Solutions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Biotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Environmental & Geological Engineering (AREA)
- Fertilizers (AREA)
Abstract
The invention relates to a zinc-rich organic fertilizer. The zinc-rich organic fertilizer is prepared from the following raw materials in parts by weight through fermentation: 65-100 parts of eggshell powder, 85-120 parts of fish meal, 150-190 parts of bean pulp, 140-200 parts of straws, 1-3 parts of a microbial agent and 1000-1350 parts of water; and after the fermentation, obtained fermentation liquid is the zinc-rich organic fertilizer. The eggshell powder, the fish meal and the bean pulp contain rich microelements such as selenium, zinc, copper, manganese and iron, the straws and the bean pulp can provide a carbon source for microorganisms, the fish meal and the bean pulp can provide a rich nitrogen source for the microorganisms, zinc-containing organic raw materials are subjected to microbial fermentation to generate an organic zinc fertilizer capable of being absorbed by crops, and the organic zinc fertilizer is applied to roots or leaves and can be absorbed by the crops, so that the purpose that the crops are rich in zinc is achieved.
Description
Technical field
The invention belongs to fertilizer field, and in particular to a kind of zinc-rich fertilizer.
Background technology
Although zinc is in little, the needed by human a kind of trace meter unit of the content and daily required intake of human body
Element, it is closely bound up with the existence of human body and health, vital effect is played to the life of human body.Micro- letter is human body
The constituent of various enzymes, which participates in the synthesis and metabolism of the materials such as nucleic acid, protein, fat and carbohydrate.Zinc is to maintaining epithelium
Cell normal morphology, growth in humans and health, the normal effect of hormone, biomembranous normal configuration and function have important work
With.In human body, the intake of zinc, metabolism or acatharsia, cause zinc content in human body too low, so as to cause growth, hypoevolutism,
Dysnoesia, hypoimmunity and reproductive function decline, or even a series of diseases such as infertile.
Patent ZL201110293233.1 discloses a kind of fruit tree zinc rich foliar fertilizer, the foliage fertilizer by following weight portion into
It is grouped into：2.0～4.0 parts of white vitriol, histidine 0.5～1.0, cysteine 0.5～1.0,0.5～1.0 part of niacinamide,
0.5～1.0 part of citric acid, 0.5～1.0 part of malic acid, 1.0～1.5 parts of surfactant, 1.0～2.0 parts of chelating agent and water
100 parts.
Jing retrievals find that current zinc-rich fertilizer is mainly by adding inorganic zinc, and inorganic zinc runs into rain during fertilising
It easily causes the loss of Zn-ef ficiency, and at the same time inorganic zinc is selective relatively strong by soil, easily with soil in other chemicals
Matter is combined, so as to affect absorptivity of the plant to zinc.At the same time, organic vegetable is in planting process, it is desirable to do not use any
The materials such as the agricultural chemicals of chemical synthesis, fertilizer, herbicide and growth regulator, thus the organic food palpus such as plantation zinc-rich organic vegetable
Using zinc-rich fertilizer.Therefore, in order to make up shortage zinc-rich fertilizer on existing market, it is organic that the present invention provides a kind of zinc-rich
Fertilizer, the fertilizer are obtained by zinc-rich raw material is fermented, can improve crops zinc content by applying the zinc-rich fertilizer, green
It is color, safe and simple.
The content of the invention
The invention provides fertilizer prepared by a kind of employing zinc-rich fermenting raw materials, the fertilizer zinc content is high, safe, green
It is color, pollution-free.
For achieving the above object, technical solution of the present invention is as follows：
A kind of zinc-rich fertilizer, including following weight portion fermenting raw materials be obtained：65～100 parts of egg-shell meal, fish meal 85～
120 parts, 150～190 parts of dregs of beans, 140～200 parts of stalk, 1～3 part of microbial bacterial agent, 1000～1350 parts of water, institute after fermentation
Obtain zymotic fluid, i.e. zinc-rich fertilizer.
Preferably, a kind of fermenting raw materials of described zinc-rich fertilizer, including following weight portion are obtained：Egg-shell meal 70～90
Part, 90～110 parts of fish meal, 160～185 parts of dregs of beans, 155～190 parts of stalk, 1.5～3 parts of microbial bacterial agent, water 1100～
1350 parts, gained zymotic fluid, i.e. zinc-rich fertilizer after fermentation.
It is furthermore preferred that a kind of described zinc-rich fertilizer, including the fermenting raw materials of following weight portion are obtained：Egg-shell meal 75～
85 parts, 95～107 parts of fish meal, 170～180 parts of dregs of beans, 165～180 parts of stalk, 1.5～2.5 parts of microbial bacterial agent, water 1200
～1300 parts, gained zymotic fluid, i.e. zinc-rich fertilizer after fermentation.
Microbial bacterial agent of the present invention includes being capable of the thermophilic and heat-resisting thin of decomposition of cellulose, hemicellulose and lignin
Bacterium, fungi, actinomyces and biology enzyme.
The present invention provides a kind of preparation method of zinc-rich fertilizer, comprises the following steps：
(1), after eggshell is dried, 80～100 mesh sieves was crushed, egg-shell meal was prepared；
(2), after fish pomace is dried, 80～100 mesh sieves was crushed, fish meal was prepared；
(3) egg-shell meal and fish meal are mixed, is prepared into zinc activity powder；
(4) stalk and dregs of beans are crushed respectively, is crossed 80～100 mesh sieves, stalk and dregs of beans are mixed, mixing is prepared
Thing；
(5) by mixture in zinc activity powder and step (4) according to weight ratio be 1：(1.5～4) mix, add micro- life
Thing microbial inoculum, adds water stirring, adjusts moisture 65%～75%, starts fermentation；
(6) when fermentation temperature reaches more than 60 DEG C, start to stir once sooner or later daily, stir to zymotic fluid bubbling, and
Keep the skin wet in time as needed；
(7) when fermentation temperature is reduced to less than 35 DEG C, continue fermentation 7～10 days, that is, complete the preparation of zinc-rich fertilizer.
The zinc-rich fertilizer of the present invention can be used for crop root part fertilising and foliage dressing.Wherein, when root applies fertilizer, will have
Machine fertilizer is diluted with water 50 times of uses；During foliage-spray, fertilizer is diluted with water into 100 times of uses.
The zinc-rich fertilizer of the present invention can be additionally used in directly cultivating crops, and concrete operations are：The zinc-rich of the present invention is had
Machine 40～50 times of dilute with water of fertilizer, then by proportion of crop planting in the zinc-rich fertilizer after dilution.
It is that egg-shell meal, fish meal and dregs of beans contain abundant selenium, zinc, copper, manganese, iron etc. that beneficial effects of the present invention embody
Trace element, stalk and dregs of beans provide carbon source for microorganism, and fish meal and dregs of beans provide abundant nitrogen source for microorganism, organic containing zinc
Raw material undergoes microbial fermentation and generates the absorbable organic zinc fertilizer of crops, is applied fertilizer by root or foliage dressing, makes crops
Absorb zinc fertilizer and reach crops zinc-rich purpose.
Specific embodiment
Below by specific embodiment, the invention will be further described, is easy to those skilled in the art to understand.
Embodiment 1
A kind of zinc-rich fertilizer, including following weight portion fermenting raw materials be obtained：65 parts of egg-shell meal, 100 parts of fish meal, dregs of beans
190 parts, 140 parts of stalk, 3 parts of microbial bacterial agent, 1000 parts of water, after fermentation, gained zymotic fluid, is zinc-rich fertilizer.
The preparation method of the zinc-rich fertilizer is as follows：
(1), after eggshell is dried, 100 mesh sieves was crushed, egg-shell meal was prepared；
(2), after fish pomace is dried, 100 mesh sieves was crushed, fish meal was prepared；
(3) egg-shell meal and fish meal are mixed, is prepared into zinc activity powder；
(4) stalk and dregs of beans are crushed, is crossed 100 mesh sieves, stalk and dregs of beans are mixed, mixture is prepared；
(5) it is 1 according to weight ratio by mixture in zinc activity powder and (4)：2 mixing, add 3 parts of microbial bacterial agent,
Stirring is added water, and moisture is adjusted 67%, is started fermentation；
(6) when fermentation temperature reaches more than 60 DEG C, start to stir once sooner or later daily, stir to zymotic fluid bubbling, and
Keep the skin wet in time as needed；
(7) when fermentation temperature is reduced to less than 35 DEG C, continue fermentation 7 days, that is, complete the preparation of zinc-rich fertilizer.
Embodiment 2
A kind of zinc-rich fertilizer, including following weight portion fermenting raw materials be obtained：80 parts of egg-shell meal, 120 parts of fish meal, dregs of beans
170 parts, 200 parts of stalk, 1 part of microbial bacterial agent, 1350 parts of water, after fermentation gained zymotic fluid, i.e. zinc-rich fertilizer.
The preparation method of the zinc-rich fertilizer is as follows：
(1), after eggshell is dried, 80 mesh sieves was crushed, egg-shell meal was prepared；
(2), after fish pomace is dried, 80 mesh sieves was crushed, fish meal was prepared；
(3) egg-shell meal and fish meal are mixed, is prepared into zinc activity powder；
(4) stalk and dregs of beans are crushed, is crossed 80 mesh sieves, stalk and dregs of beans are mixed, mixture is prepared；
(5) it is 1 according to weight ratio by mixture in zinc activity powder and (4)：1.8 mixing, add microbial bacterial agent, then
Add water stirring, adjusts moisture 70%, starts fermentation；
(6) when fermentation temperature reaches more than 60 DEG C, start to stir once sooner or later daily, stir to zymotic fluid bubbling, and
Keep the skin wet in time as needed；
(7) when fermentation temperature is reduced to less than 35 DEG C, continue fermentation 10 days, that is, complete the preparation of zinc-rich fertilizer.
Embodiment 2
A kind of zinc-rich fertilizer, including following weight portion fermenting raw materials be obtained：80 parts of egg-shell meal, 120 parts of fish meal, dregs of beans
170 parts, 200 parts of stalk, 1 part of microbial bacterial agent, 1350 parts of water, after fermentation gained zymotic fluid, i.e. zinc-rich fertilizer.
The preparation method of the zinc-rich fertilizer is as follows：
(1), after eggshell is dried, 80 mesh sieves was crushed, egg-shell meal was prepared；
(2), after fish pomace is dried, 80 mesh sieves was crushed, fish meal was prepared；
(3) egg-shell meal and fish meal are mixed, is prepared into zinc activity powder；
(4) stalk and dregs of beans are crushed, is crossed 80 mesh sieves, stalk and dregs of beans are mixed, mixture is prepared；
(5) it is 1 according to weight ratio by mixture in zinc activity powder and (4)：1.8 mixing, add microbial bacterial agent, then
Add water stirring, adjusts moisture 70%, starts fermentation；
(6) when fermentation temperature reaches more than 60 DEG C, start to stir once sooner or later daily, stir to zymotic fluid bubbling, and
Keep the skin wet in time as needed；
(7) when fermentation temperature is reduced to less than 35 DEG C, continue fermentation 10 days, that is, complete the preparation of zinc-rich fertilizer.
Embodiment 3
A kind of zinc-rich fertilizer, including following weight portion fermenting raw materials be obtained：100 parts of egg-shell meal, 85 parts of fish meal, dregs of beans
150 parts, 170 parts of stalk, 2.5 parts of microbial bacterial agent, 1200 parts of water, after fermentation gained zymotic fluid, i.e. zinc-rich fertilizer.
The preparation method of the zinc-rich fertilizer is as follows：
(1), after eggshell is dried, 80 mesh sieves was crushed, egg-shell meal was prepared；
(2), after fish pomace is dried, 80 mesh sieves was crushed, fish meal was prepared；
(3) egg-shell meal and fish meal are mixed, is prepared into zinc activity powder；
(4) stalk and dregs of beans are crushed, is crossed 80 mesh sieves, stalk and dregs of beans are mixed, mixture is prepared；
(5) it is 1 according to weight ratio by mixture in zinc activity powder and (4)：3 mixing, addition microbial bacterial agent, then plus
Water is stirred, and is adjusted moisture 75%, is started fermentation；
(6) when fermentation temperature reaches more than 60 DEG C, start to stir once sooner or later daily, stir to zymotic fluid bubbling, and
Keep the skin wet in time as needed；
(7) when fermentation temperature is reduced to less than 35 DEG C, continue fermentation 9 days, that is, complete the preparation of zinc-rich fertilizer.
Embodiment 4
A kind of zinc-rich fertilizer, including following weight portion fermenting raw materials be obtained：80 parts of egg-shell meal, 100 parts of fish meal, dregs of beans
175 parts, 170 parts of stalk, 2 parts of microbial bacterial agent, 1250 parts of water, after fermentation gained zymotic fluid, i.e. zinc-rich fertilizer.
The preparation method of the zinc-rich fertilizer is as follows：
(1), after eggshell is dried, 80 mesh sieves was crushed, egg-shell meal was prepared；
(2), after fish pomace is dried, 80 mesh sieves was crushed, fish meal was prepared；
(3) egg-shell meal and fish meal are mixed, is prepared into zinc activity powder；
(4) stalk and dregs of beans are crushed, is crossed 80 mesh sieves, stalk and dregs of beans are mixed, mixture is prepared；
(5) it is 1 according to weight ratio by mixture in zinc activity powder and (4)：4 mixing, addition microbial bacterial agent, then plus
Water is stirred, and is adjusted moisture 70%, is started fermentation；
(6) when fermentation temperature reaches more than 60 DEG C, start to stir once sooner or later daily, stir to zymotic fluid bubbling, and
Keep the skin wet in time as needed；
(7) when fermentation temperature is reduced to less than 35 DEG C, continue fermentation 10 days, that is, complete the preparation of zinc-rich fertilizer.
The present invention carries out following test and enters line justification to the effect of vegetables richness iron fertilizer：
Test material is romaine lettuce, eggplant and celery, and experimental group is vegetables zinc-rich fertilizer prepared by embodiment 1-5, is compareed
Group is clear water.Experimental group carries out pouring root application of organic fertilizers in vegetable in seedling period and growth early stage, wet to matrix or soil to pour
Profit is advisable, and time of application is typically spaced 3～5 days, such as the rainy day, re-starts pouring root at second day.Control group is in vegetables nursery
Phase and growth early stage carry out clear water pouring root, the same experimental group of other conditions.
After vegetables harvest, the Zn content of Chinese leaf, eggplant fruit and celery cauline leaf is determined with ICP-MS, result of the test is shown in Table
1st, table 2 and table 3.
Result of the test shows that romaine lettuce, eggplant and the celery growth period ratio control group that experimental group is processed is short, illustrates to apply this
The zinc-rich fertilizer of invention can shorten the vegetable growth cycle.In Chinese leaf, eggplant fruit and celery cauline leaf that experimental group is processed
Apparently higher than control group, Zn content illustrates that the zinc-rich fertilizer of the present invention can improve vegetables Zn content.
Iron content measurement result in 1 each treatment group Growth of Lettuce cycle of table and Chinese leaf.
Iron content measurement result in 2 each treatment group eggplant growth cycle of table and fruit.
Iron content measurement result in 3 each treatment group celery growth cycle of table and celery cauline leaf.
Embodiment described above is only better embodiment of the present invention, but embodiment of the present invention is not limited only to this, every
It is improved on the basis of the present invention, equivalent etc. belongs to protection scope of the present invention.
Claims (7)
1. a kind of zinc-rich fertilizer, it is characterised in that be obtained including the fermenting raw materials of following weight portion：65～100 parts of egg-shell meal,
85～120 parts of fish meal, 150～190 parts of dregs of beans, 140～200 parts of stalk, 1～3 part of microbial bacterial agent, 1000～1350 parts of water,
Gained zymotic fluid, i.e. zinc-rich fertilizer after fermentation.
2. a kind of zinc-rich fertilizer according to claim 1, it is characterised in that including the fermenting raw materials system of following weight portion
：70～90 parts of egg-shell meal, 90～110 parts of fish meal, 160～185 parts of dregs of beans, 155～190 parts of stalk, microbial bacterial agent 1.5～
3 parts, 1100～1350 parts of water, gained zymotic fluid, i.e. zinc-rich fertilizer after fermentation.
3. a kind of zinc-rich fertilizer according to claim 1 and 2, it is characterised in that send out including the raw material of following weight portion
Ferment is obtained：75～85 parts of egg-shell meal, 95～107 parts of fish meal, 170～180 parts of dregs of beans, 165～180 parts of stalk, microbial bacterial agent
1.5～2.5 parts, 1200～1300 parts of water, gained zymotic fluid, i.e. zinc-rich fertilizer after fermentation.
4. a kind of zinc-rich fertilizer according to claim 1 and 2, it is characterised in that the zinc-rich preparation method of organic fertilizer
Comprise the following steps：
(1), after eggshell is dried, 80～100 mesh sieves was crushed, egg-shell meal was prepared；
(2), after fish pomace is dried, 80～100 mesh sieves was crushed, fish meal was prepared；
(3) egg-shell meal and fish meal are mixed, is prepared into zinc activity powder；
(4) stalk and dregs of beans are crushed respectively, is crossed 80～100 mesh sieves, stalk and dregs of beans are mixed, mixture is prepared；
(5) by mixture in zinc activity powder and step (4) according to weight ratio be 1：(1.5～4) mix, add microbial bacteria
Agent, adds water stirring, adjusts moisture 65%～75%, starts fermentation；
(6) when fermentation temperature reaches more than 60 DEG C, start to stir once sooner or later daily, stir to zymotic fluid bubbling, and according to
Need to keep the skin wet in time；
(7) when fermentation temperature is reduced to less than 35 DEG C, continue fermentation 7～10 days, that is, complete the preparation of zinc-rich fertilizer.
5. a kind of zinc-rich fertilizer according to right 1 or 2, it is characterised in that zinc-rich fertilizer can be used for crop root part
Fertilising and foliage dressing.
6. a kind of zinc-rich fertilizer according to right 1 or 2, it is characterised in that：When root applies fertilizer, fertilizer is diluted with water
20～30 times of uses；During foliage-spray, fertilizer is diluted with water into 50 times of uses.
7. a kind of zinc-rich fertilizer according to claim 1, it is characterised in that the zinc-rich fertilizer can be used for directly training
Foster crops, specifically by 40～50 times of the zinc-rich fertilizer dilute with water, the then richness by proportion of crop planting after dilution
In zinc fertilizer.
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| CN201710012726.0A CN106518193A (en) | 2017-01-06 | 2017-01-06 | Zinc-rich organic fertilizer |
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| CN201710012726.0A CN106518193A (en) | 2017-01-06 | 2017-01-06 | Zinc-rich organic fertilizer |
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| CN106518193A true CN106518193A (en) | 2017-03-22 |
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ID=58335249
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108812115A (en) * | 2018-06-25 | 2018-11-16 | 李满德 | A kind of implantation methods of long romaine lettuce |
| CN108892572A (en) * | 2018-08-30 | 2018-11-27 | 安徽云超智能科技有限公司 | Nutrition Soil is used in a kind of plantation |
| CN113207594A (en) * | 2021-06-09 | 2021-08-06 | 武汉新联大生物有限公司 | Cultivation method of zinc-rich asparagus cochinchinensis |
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|---|---|---|---|---|
| CN102320892A (en) * | 2011-09-30 | 2012-01-18 | 浙江师范大学 | The rich zinc foliage fertilizer of fruit tree |
| CN104909867A (en) * | 2014-03-12 | 2015-09-16 | 随州新欣农业有限公司 | Bioorganic fertilizer and preparation method thereof |
| CN105009858A (en) * | 2014-04-27 | 2015-11-04 | 陕西省安康市元辰实业(集团)有限公司 | Method for planting selenium-rich corns |
| CN105061103A (en) * | 2015-09-12 | 2015-11-18 | 顾伟 | Organic fertilizer special for organic vegetable |
| CN105777233A (en) * | 2016-05-16 | 2016-07-20 | 佛山市聚成生化技术研发有限公司 | Selenium-rich nutrient solution and preparation method thereof |
-
2017
- 2017-01-06 CN CN201710012726.0A patent/CN106518193A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102320892A (en) * | 2011-09-30 | 2012-01-18 | 浙江师范大学 | The rich zinc foliage fertilizer of fruit tree |
| CN104909867A (en) * | 2014-03-12 | 2015-09-16 | 随州新欣农业有限公司 | Bioorganic fertilizer and preparation method thereof |
| CN105009858A (en) * | 2014-04-27 | 2015-11-04 | 陕西省安康市元辰实业(集团)有限公司 | Method for planting selenium-rich corns |
| CN105061103A (en) * | 2015-09-12 | 2015-11-18 | 顾伟 | Organic fertilizer special for organic vegetable |
| CN105777233A (en) * | 2016-05-16 | 2016-07-20 | 佛山市聚成生化技术研发有限公司 | Selenium-rich nutrient solution and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108812115A (en) * | 2018-06-25 | 2018-11-16 | 李满德 | A kind of implantation methods of long romaine lettuce |
| CN108892572A (en) * | 2018-08-30 | 2018-11-27 | 安徽云超智能科技有限公司 | Nutrition Soil is used in a kind of plantation |
| CN113207594A (en) * | 2021-06-09 | 2021-08-06 | 武汉新联大生物有限公司 | Cultivation method of zinc-rich asparagus cochinchinensis |
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Application publication date: 20170322 |