CN106380343A - Water-soluble organic fertilizer containing medium trace elements and preparation method of water-soluble organic fertilizer - Google Patents
Water-soluble organic fertilizer containing medium trace elements and preparation method of water-soluble organic fertilizer Download PDFInfo
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- CN106380343A CN106380343A CN201610754725.9A CN201610754725A CN106380343A CN 106380343 A CN106380343 A CN 106380343A CN 201610754725 A CN201610754725 A CN 201610754725A CN 106380343 A CN106380343 A CN 106380343A
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- parts
- organic fertilizer
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- soluble organic
- fertilizer
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Classifications
-
- 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
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B1/00—Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly
- C05B1/02—Superphosphates
-
- 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
- C05F17/50—Treatments combining two or more different biological or biochemical treatments, e.g. anaerobic and aerobic treatment or vermicomposting and aerobic treatment
-
- 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
Abstract
The invention discloses a water-soluble organic fertilizer containing medium trace elements. The water-soluble organic fertilizer comprises the following components, by weight percentage, 150-200 parts of maifan stone, 5-20 parts of a soil improvement fertilizer, 30-40 parts of trace elements, 16-25 parts of a composite biological agent, 20-40 parts of gypsum powder, 10-20 parts of ground phosphate rock, 10-15 parts of ferrous sulphate, 10-15 parts of aluminum sulfate and 10-20 parts of sulfur powder. Adverse reactions between elements and multiple ions can be effectively prevented, and the use ratio of a medium trace element fertilizer can be effectively increased. After the water-soluble organic fertilizer is applied to soil, the beneficial bacteria amount in the soil can be effectively supplemented, fixed nutrients in the soil are promoted to decompose, the fertilizer providing capability of soil is improved, and healthy growth of plants is ensured. Input of the fertilizer is reduced, the use ratio of the fertilizer is increased, the soil is improved, and the cost is saved.
Description
Technical field
The present invention relates to a kind of contain middle trace element water-soluble organic fertilizer and preparation method thereof.
Background technology
The salinization of soil is larger to soil physico-chemical property destruction ratio, and pole is unfavorable for the growth of many crops, easily causes work
Thing is short of seedling or dead, thus hindering the development of agricultural economy.Salt-soda soil is many due to salt content, and organic quality is few, and acid-base value is high, makes
Agron suffers leaching loss, and soil texture is destroyed, glutinous when showing as wet, and hard when dry, native table often has white salinity accumulation,
Ventilation, permeable bad, serious meeting causes plant wilt, poisoning and rotten death.In addition, surface soil alkalinity is too big, have influence on soil
The validity of the nutrients such as the phosphorus in earth, iron, manganese, boron, zinc, easily causes a large amount of nitrogen, phosphorus, potassium essential element and iron, calcium, boron
Shortage Deng trace element.
Water soluble fertilizer is a kind of polyelement composite fertilizer that can be completely soluble, and it can promptly be dissolved in the water, more
Easily absorbed by crops, and its absorption rate is of a relatively high, and more crucially it can apply to be sprayed the facilities such as filling
Agricultural, realizes water-fertilizer integral, reaches the efficiency that water-saving saves fertile saving of labor.In general, water soluble fertilizer can contain crop life
Whole nutrients required for long, such as N, P, K, Ca, Mg, S and trace element etc..
During existing middle trace element fertilizer produces, one kind is to be directly added into composite fertilizer with inorganic salt form, because each element it
Between antagonism and mutual chemical reaction and soil in different kinds of ions interaction, the reacted quilt of most elements
Soil fixing, generates water-fast inorganic salts it is difficult to be absorbed and used by plants；Another kind is to make use of chelating technology, adds
Specific chelate, prevents the bad reaction between each element and between different kinds of ions, serves in raising to a certain extent
The effect of trace-element fertilizer utilization rate, but effect is still undesirable.
Content of the invention
The technical problem to be solved in the present invention is to overcome existing organic fertilizer single function it is impossible to multi-party to alkaline land soil
The defect that face is improved, provides one kind containing middle trace element water-soluble organic fertilizer and preparation method thereof.
In order to solve above-mentioned technical problem, the invention provides following technical scheme：
One kind contains middle trace element water-soluble organic fertilizer, including each component of following parts by weight：
150～200 parts of medical stone, 5～20 parts of soil improvement fertilizer, micro- 30～40 parts of agent, composite bacteria agent 16
～25 parts, 20～40 parts of land plaster, 10～20 parts of ground phosphate rock, 10～15 parts of ferrous sulfate, 10～15 parts of aluminum sulfate, Cosan 10
～20 parts.
Preferably, one kind contains middle trace element water-soluble organic fertilizer, including each component of following parts by weight：
180 parts of medical stone, fertile 12 parts of soil improvement, micro- 35 parts of agent, 20 parts of composite bacteria agent, land plaster 30
Part, 15 parts of ground phosphate rock, 12 parts of ferrous sulfate, 12 parts of ammonium chloride, 15 parts of Cosan.
Further, the fertile each component including following parts by weight of described soil improvement：20～30 parts of ammonium nitrate, chlorination
20～30 parts of ammonium, calcium superphosphate 20-30 part, 5～10 parts of potassium dihydrogen phosphate, 16～20 parts of zinc sulfate, 4～10 parts of ammonium sulfate, boron
12～16 parts of acid.
Further, described composite bacteria agent is by colloid gemma bar, bacillus licheniformis, rhizobium, withered grass gemma
Bacillus, bacillus megaterium and silicate bacteria composition.
Further, described micro- agent by titanium dioxide, borax, cupric sulfate pentahydrate, manganese sulfate, selenium dioxide and
Strontium carbonate forms.
The preparation method of this organic fertilizer, comprises the following steps：
1), medical stone is mixed with trace element, add composite bacteria agent, ferment 7～14 days；
2), add soil improvement fertilizer, land plaster, ground phosphate rock, ferrous sulfate, aluminum sulfate, Cosan, mix, fermentation 5
～10 days；
3) material after will be fermented is delivered to granulating disc and carries out disc granulation, obtains final product described organic fertilizer.
Further, the organic fertilizer after granulation is carried out drying and processing, water content obtains final product organic fertilizer 12～15%
Finished product.
The present invention is while being effectively prevented the bad reaction between each element and different kinds of ions, micro- in raising
The utilization rate aspect effect is significant of fertilizer, in being manured into soil after, effectively supplement soil beneficial bacterium quantity, promote fixing in soil supporting
The decomposition dividing, improves soil supplying nutrient capability it is ensured that plant grows up healthy and sound.Reduce the input amount of fertilizer, improve utilization rate of fertilizer
Meanwhile, improved soil, cost-effective.
The present invention provide containing middle trace element water-soluble organic fertilizer, its raw material is easy to get, it is simple, vdiverse in function to prepare,
Can increase salt-soda soil fertility, simultaneously can also loose soil property, play the effect of water conservation, its good water solubility, soil can improved
While earth water content, increase the fertility of soil, improve the soil property in salt-soda soil；The collocation of the present invention various nutrient content is closed
Reason, each composition be combined with each other, influences each other, and coordinated with each other have a stimulation plant growth, the features such as drought resisting, cold-resistant, salt resistance alkali, makes
Combination of pesticide and fertilizer, enables soil saline-alkali tolerance to be greatly improved.
In medical stone, silicone content accounts for more than 60wt%, from the content of 75-90, both can guarantee that in finished product, silicone content accounted for
More than 50wt%, this content after overactivation, quick-acting silicone contents in more than 20wt%, slow silicone content 30wt% with
Above it is ensured that providing promptness and the persistence of nutrient, improve utilization rate.In the same manner, micro- in the calcium of plant needs, magnesium, boron, zinc etc.
Secondary element, using this component ratio, is prevented effectively from the antagonism between element, is easily absorbed and used by plants, can reach
Higher utilization rate.Ferro element containing denier in medical stone, this order of magnitude is not enough to industrial utilization, and just can answer
Use and prepare in bio-feritlizer, conversion is carried out by biological bacteria and utilizes for plant absorption.Additionally, during screening medical stone,
" remanent magnetism " of the extremely weak property of medical stone powder institute band, to improving soil physico-chemical property, promotes biological activity of soil to also function to certain work
With.
The Main Function of the colloid bacillus cereus in composite bacteria agent is the inorganic silicon decomposed, discharge in medical stone, will
Inorganic silicon is converted into the organosilicon (single silicic acid) of plant available, is maximally effective component in bacterium solution.The quantitative proportion of 3-8 part,
Just progressively the inorganic silicon in medical stone can effectively be converted, meet the demand of growing process.If quantity is too high, conversion is too
Hurry up, fertilizer efficiency is not lasting, impact absorbs, or even disposable release is too many, make plant produce physiological disturbance.Bacillus subtilis
Bacterium, bacillus megaterium, bacillus licheniformis help out, and decompose soil organic nutrient, activating soil, discharge soil solidification
Nutrient, builds the good growing environment of microorganism, plays facilitation to the activation plays of colloid bacillus cereus.
Land plaster can go out the sodium ion of soil colloids with calcium ion-exchanged, reduces the pH value of soil, suppresses soil
In Na+, HCO3 -, and CO3 2-Plasma.
This after applying aluminum sulfate to saline-alkali soil, in the soil liquid, sodium ion, carbonate and bicarbonate ion increase,
Soil liquid pH value declines, and soil property is improved.With the increase of aluminum sulfate, the soluble-salt that soil particle discharges is also a large amount of
Increase hence it is evident that decreasing the salts substances in soil.Coagulating soil becomes substantial amounts of molecule simultaneously.
Specific embodiment
Hereinafter the preferred embodiments of the present invention are illustrated it will be appreciated that preferred embodiment described herein is only used
In the description and interpretation present invention, it is not intended to limit the present invention.
Embodiment 1
One kind contains middle trace element water-soluble organic fertilizer, including each component of following parts by weight：
150 parts of medical stone, fertile 5 parts of soil improvement, micro- 40 parts of agent, 25 parts of composite bacteria agent, 20 parts of land plaster,
20 parts of ground phosphate rock, 10 parts of ferrous sulfate, 15 parts of aluminum sulfate, 10 parts of Cosan.
Wherein, the fertile each component including following parts by weight of soil improvement：20 parts of ammonium nitrate, 30 parts of ammonium chloride, peroxophosphoric acid
20 parts of calcium, 10 parts of potassium dihydrogen phosphate, 16 parts of zinc sulfate, 10 parts of ammonium sulfate, 12 parts of boric acid.
Described micro- agent is by titanium dioxide, borax, cupric sulfate pentahydrate, manganese sulfate, selenium dioxide and strontium carbonate group
Become.
The preparation method of the organic fertilizer of the present embodiment, comprises the following steps：
1) medical stone is mixed with trace element, add composite bacteria agent, ferment 7 days；
2) add soil improvement fertilizer, land plaster, ground phosphate rock, ferrous sulfate, aluminum sulfate, Cosan, mix, fermentation 10
My god；
3) material after will be fermented is delivered to granulating disc and carries out disc granulation, obtains final product described organic fertilizer.
Embodiment 2
One kind contains middle trace element water-soluble organic fertilizer, including each component of following parts by weight：
200 parts of medical stone, fertile 20 parts of soil improvement, micro- 30 parts of agent, 16 parts of composite bacteria agent, land plaster 40
Part, 10 parts of ground phosphate rock, 15 parts of ferrous sulfate, 10 parts of aluminum sulfate, 20 parts of Cosan.
Wherein, the fertile each component including following parts by weight of soil improvement：30 parts of ammonium nitrate, 20 parts of ammonium chloride, peroxophosphoric acid
20 parts of calcium, 5 parts of potassium dihydrogen phosphate, 20 parts of zinc sulfate, 4 parts of ammonium sulfate, 16 parts of boric acid.
Composite bacteria agent is by colloid gemma bar, bacillus licheniformis, rhizobium, bacillus subtilis, huge gemma bar
Bacterium and silicate bacteria composition.
Described micro- agent is by titanium dioxide, borax, cupric sulfate pentahydrate, manganese sulfate, selenium dioxide and strontium carbonate group
Become.
The preparation method of the organic fertilizer of the present embodiment, comprises the following steps：
1) medical stone is mixed with trace element, add composite bacteria agent, ferment 14 days；
2) add soil improvement fertilizer, land plaster, ground phosphate rock, ferrous sulfate, aluminum sulfate, Cosan, mix, fermentation 5
My god；
3) material after will be fermented is delivered to granulating disc and carries out disc granulation, obtains final product described organic fertilizer.
Embodiment 3
One kind contains middle trace element water-soluble organic fertilizer, including each component of following parts by weight：
180 parts of medical stone, fertile 12 parts of soil improvement, 35 parts of trace element, 20 parts of composite bacteria agent, 30 parts of land plaster,
15 parts of ground phosphate rock, 12 parts of ferrous sulfate, 12 parts of aluminum sulfate, 15 parts of Cosan.
Wherein, the fertile each component including following parts by weight of soil improvement：25 parts of ammonium nitrate, 25 parts of ammonium chloride, peroxophosphoric acid
25 parts of calcium, 8 parts of potassium dihydrogen phosphate, 18 parts of zinc sulfate, 7 parts of ammonium sulfate, 14 parts of boric acid.
Composite bacteria agent is by colloid gemma bar, bacillus licheniformis, rhizobium, bacillus subtilis, huge gemma bar
Bacterium and silicate bacteria composition.
Described micro- agent is by titanium dioxide, borax, cupric sulfate pentahydrate, manganese sulfate, selenium dioxide and strontium carbonate group
Become.
The preparation method of the organic fertilizer of the present embodiment, comprises the following steps：
1) medical stone is mixed with trace element, add composite bacteria agent, ferment 10 days；
2) add soil improvement fertilizer, land plaster, ground phosphate rock, ferrous sulfate, aluminum sulfate, Cosan, mix, fermentation 8
My god；
3) material after will be fermented is delivered to granulating disc and carries out disc granulation, obtains final product described organic fertilizer.
The present invention is while being effectively prevented the bad reaction between each element and different kinds of ions, micro- in raising
The utilization rate aspect effect is significant of fertilizer, in being manured into soil after, effectively supplement soil beneficial bacterium quantity, promote fixing in soil supporting
The decomposition dividing, improves soil supplying nutrient capability it is ensured that plant grows up healthy and sound.Reduce the input amount of fertilizer, improve utilization rate of fertilizer
Meanwhile, improved soil, cost-effective.
The present invention provide containing middle trace element water-soluble organic fertilizer, its raw material is easy to get, it is simple, vdiverse in function to prepare,
Can increase salt-soda soil fertility, simultaneously can also loose soil property, play the effect of water conservation, its good water solubility, soil can improved
While earth water content, increase the fertility of soil, improve the soil property in salt-soda soil；The collocation of the present invention various nutrient content is closed
Reason, each composition be combined with each other, influences each other, and coordinated with each other have a stimulation plant growth, the features such as drought resisting, cold-resistant, salt resistance alkali, makes
Combination of pesticide and fertilizer, enables soil saline-alkali tolerance to be greatly improved.
In medical stone, silicone content accounts for more than 60wt%, from the content of 75-90, both can guarantee that in finished product, silicone content accounted for
More than 50wt%, this content after overactivation, quick-acting silicone contents in more than 20wt%, slow silicone content 30wt% with
Above it is ensured that providing promptness and the persistence of nutrient, improve utilization rate.In the same manner, micro- in the calcium of plant needs, magnesium, boron, zinc etc.
Secondary element, using this component ratio, is prevented effectively from the antagonism between element, is easily absorbed and used by plants, can reach
Higher utilization rate.Ferro element containing denier in medical stone, this order of magnitude is not enough to industrial utilization, and just can answer
Use and prepare in bio-feritlizer, conversion is carried out by biological bacteria and utilizes for plant absorption.Additionally, during screening medical stone,
" remanent magnetism " of the extremely weak property of medical stone powder institute band, to improving soil physico-chemical property, promotes biological activity of soil to also function to certain work
With.
The Main Function of the colloid bacillus cereus in composite bacteria agent is the inorganic silicon decomposed, discharge in medical stone, will
Inorganic silicon is converted into the organosilicon (single silicic acid) of plant available, is maximally effective component in bacterium solution.The quantitative proportion of 3-8 part,
Just progressively the inorganic silicon in medical stone can effectively be converted, meet the demand of growing process.If quantity is too high, conversion is too
Hurry up, fertilizer efficiency is not lasting, impact absorbs, or even disposable release is too many, make plant produce physiological disturbance.Bacillus subtilis
Bacterium, bacillus megaterium, bacillus licheniformis help out, and decompose soil organic nutrient, activating soil, discharge soil solidification
Nutrient, builds the good growing environment of microorganism, plays facilitation to the activation plays of colloid bacillus cereus.
Land plaster can go out the sodium ion of soil colloids with calcium ion-exchanged, reduces the pH value of soil, suppresses soil
In Na+, HCO3 -, and CO3 2-Plasma.
This after applying aluminum sulfate to saline-alkali soil, in the soil liquid, sodium ion, carbonate and bicarbonate ion increase,
Soil liquid pH value declines, and soil property is improved.With the increase of aluminum sulfate, the soluble-salt that soil particle discharges is also a large amount of
Increase hence it is evident that decreasing the salts substances in soil.Coagulating soil becomes substantial amounts of molecule simultaneously.
Finally it should be noted that：The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention,
Although being described in detail to the present invention with reference to the foregoing embodiments, for a person skilled in the art, it still may be used
To modify to the technical scheme described in foregoing embodiments, or equivalent is carried out to wherein some technical characteristics.
All any modification, equivalent substitution and improvement within the spirit and principles in the present invention, made etc., should be included in the present invention's
Within protection domain.
Claims (7)
1. a kind of containing middle trace element water-soluble organic fertilizer it is characterised in that include following parts by weight each component：
150～200 parts of medical stone, 5～20 parts of soil improvement fertilizer, micro- 30～40 parts of agent, composite bacteria agent 16～25
Part, 20～40 parts of land plaster, 10～20 parts of ground phosphate rock, 10～15 parts of ferrous sulfate, 10～15 parts of aluminum sulfate, Cosan 10～20
Part.
2. contain middle trace element water-soluble organic fertilizer as claimed in claim 1 it is characterised in that including following parts by weight
Each component：
180 parts of medical stone, fertile 12 parts of soil improvement, 35 parts of trace element, 20 parts of composite bacteria agent, 30 parts of land plaster, phosphorus ore
15 parts of powder, 12 parts of ferrous sulfate, 12 parts of ammonium chloride, 15 parts of Cosan.
3. contain middle trace element water-soluble organic fertilizer as claimed in claim 2 it is characterised in that described soil improvement is fertile
Each component including following parts by weight：20～30 parts of ammonium nitrate, 20～30 parts of ammonium chloride, calcium superphosphate 20-30 part, di(2-ethylhexyl)phosphate
5～10 parts of hydrogen potassium, 16～20 parts of zinc sulfate, 4～10 parts of ammonium sulfate, 12～16 parts of boric acid.
4. as claimed in claim 1 contain middle trace element water-soluble organic fertilizer it is characterised in that described compound biological bacterium
Agent is made up of colloid gemma bar, bacillus licheniformis, rhizobium, bacillus subtilis, bacillus megaterium and silicate bacteria.
5. as claimed in claim 1 contain middle trace element water-soluble organic fertilizer it is characterised in that described micro- agent
It is made up of titanium dioxide, borax, cupric sulfate pentahydrate, manganese sulfate, selenium dioxide and strontium carbonate.
6. the arbitrary described preparation method containing middle trace element water-soluble organic fertilizer of a kind of Claims 1 to 5, its feature exists
In comprising the following steps：
1), medical stone is mixed with trace element, add composite bacteria agent, ferment 7～14 days；
2), add soil improvement fertilizer, land plaster, ground phosphate rock, ferrous sulfate, aluminum sulfate, Cosan, mix, fermentation 5～10
My god；
3) material after will be fermented is delivered to granulating disc and carries out disc granulation, obtains final product described organic fertilizer.
7. contain as claimed in claim 6 the preparation method of middle trace element water-soluble organic fertilizer it is characterised in that step 3)
In, the organic fertilizer after granulation is carried out drying and processing, water content obtains final product organic fertilizer finished product 12～15%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610754725.9A CN106380343A (en) | 2016-08-29 | 2016-08-29 | Water-soluble organic fertilizer containing medium trace elements and preparation method of water-soluble organic fertilizer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610754725.9A CN106380343A (en) | 2016-08-29 | 2016-08-29 | Water-soluble organic fertilizer containing medium trace elements and preparation method of water-soluble organic fertilizer |
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| Publication Number | Publication Date |
|---|---|
| CN106380343A true CN106380343A (en) | 2017-02-08 |
Family
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110862286A (en) * | 2019-12-30 | 2020-03-06 | 山东多芬农业有限公司 | Medium trace element and preparation and use method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103611724A (en) * | 2013-11-07 | 2014-03-05 | 吉林牧田农业技术开发有限公司 | Saline-alkali soil restoration agent |
| CN103708918A (en) * | 2013-12-09 | 2014-04-09 | 山东金科天元生物肥料有限公司 | Active medium trace element mineral fertilizer and preparation method thereof |
| CN105131968A (en) * | 2015-09-02 | 2015-12-09 | 山东农大肥业科技有限公司 | Alkaline soil conditioner and continuous steam-pressing device and method thereof |
-
2016
- 2016-08-29 CN CN201610754725.9A patent/CN106380343A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103611724A (en) * | 2013-11-07 | 2014-03-05 | 吉林牧田农业技术开发有限公司 | Saline-alkali soil restoration agent |
| CN103708918A (en) * | 2013-12-09 | 2014-04-09 | 山东金科天元生物肥料有限公司 | Active medium trace element mineral fertilizer and preparation method thereof |
| CN105131968A (en) * | 2015-09-02 | 2015-12-09 | 山东农大肥业科技有限公司 | Alkaline soil conditioner and continuous steam-pressing device and method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110862286A (en) * | 2019-12-30 | 2020-03-06 | 山东多芬农业有限公司 | Medium trace element and preparation and use method thereof |
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Application publication date: 20170208 |