CN108409409A - Organic fertilizer and preparation method thereof - Google Patents
Organic fertilizer and preparation method thereof Download PDFInfo
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- CN108409409A CN108409409A CN201810259992.8A CN201810259992A CN108409409A CN 108409409 A CN108409409 A CN 108409409A CN 201810259992 A CN201810259992 A CN 201810259992A CN 108409409 A CN108409409 A CN 108409409A
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- organic fertilizer
- amino acid
- waste liquid
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C11/00—Other nitrogenous fertilisers
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Soil Sciences (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses the following components of a kind of organic fertilizer, including each mass parts：35~75 parts of amino acid waste liquid, 5~20 parts of biochemical fulvic acid, 0.8~3 part of trace element, 10~20 parts of weathered coal humic acid, 0.1~10 part of boron mud, 15~35 parts of a great number of elements, 0.3~1 part of synergist, 10~25 parts of filler.The organic fertilizer of the present invention is primary raw material using amino acid waste liquid, provides a variety of amino acid, and trace element in double chelant ties is combined with biochemical fulvic acid, then add boron mud, mineral resources humic acid, synergist, rapid long-acting is combined, and lasting fertility is provided for crop；And raw material obtains and processing is simple, environment friendly and pollution-free, at low cost, high financial profit.
Description
Technical field
The present invention relates to organic fertilizer preparing technical fields more particularly to a kind of organic fertilizer and preparation method thereof.
Background technology
China is a large agricultural country, is had a large population and a few land, and increases in grain production, which rely primarily on, largely applies chemical fertilizer, so that possessing generation
But the chemical fertilizer in the world 30% has been consumed in the arable land on boundary 10%.Currently, the situation that China soil mainly faces be excessive fertilization,
The problems such as blindly fertilising causes soil hardening, and organic matter declines, beneficial microbe is reduced, soil acidification.
It is employed to apply instead of tradition in view of the above-mentioned problems, a variety of organic fertilizer with long-acting improvement effect are more and more
Fertilizer.Organic fertilizer can improve soil, improve soil fertility, make the normal ecological balance of soil restoration, can increase soil organic matter content,
Crumb structure is formed, Soil ventilation, water conservation, fertilizer conservation performance are improved, to be conducive to the growth of crop root, improves and improves and plant
Object quality and yield.Organic fertilizer can be reduced causes agricultural product to being endangered caused by human body and birds and beasts because chemical fertilizer application is excessive；
On the other hand, inorganic, the organic nutrient that organic fertilizer itself contains can directly provide corps nutrient, be conducive to crop absorption and
The raising of quality enhances the activity of soil enzyme.The activity of Soil Microorganism is the basic source that soil enzyme is formed and accumulated.Soil
Earth content of microorganisms increases, and soil peroxidase, invertase isoreactivity significantly improves, and since enzymatic effect enhances, accelerates soil
The decomposition of earth organic matter and the conversion of mineral nutrients, obtain and favorably give absorption of the crop root system to nutrient, biological organic fertilizer energy
Enough enhance the ability of plant disease-resistant insect pest.
For example CN201410136500.8 patents of invention provide a kind of Amino-acid organic compound fertilizer and its production method,
With straw 20%~30%, dry animal wastes 30~40%, cake fertilizer 10%, sludge 10%, vinasse 8%, organic fertilizer
Leavening 1%, bactericidal deodorant 1%, amino acid waste liquid (solid content) 10% are raw material, dense by the filtering of amino acid waste liquid
Contracting, the fermenting of organic matter, the blending of all raw materials, granulation, it is dry after product Amino-acid organic compound fertilizer particle is made.Its ingredient
In by the filtering and concentrating of amino acid waste liquid, the fermenting of organic matter, the blending of all raw materials, granulation, it is dry after product ammonia is made
Base acid organic compound fertilizer granules, containing abundant organic matter and amino acid, particularly suitable field crop makees base manure and top dressing uses,
Have the function of improveing soil, activating soil.For another example, a kind of compound ammonia that CN201210088715.8 patents of invention provide
Base acid organic fertilizer and its production method, compound amino acid organic fertilizer are by compound amino acid 5~10, microbial fermenters 0.3
~0.5, inorganic fertilizer 1~29, humic acid fertilizer 5~10, trace element 0.2~1.Contained by its ingredient containing amino acid fertilizer,
Humic acid containing amino acid (fulvic acid) organic fertilizer, humic acid organic fertilizer containing amino acid fertilizer make rice High quality sweet rice, fruit and vegetable, sugarcane
Base manure or top dressing；It is easily absorbed and utilized by plant, and the organic matter of soil can be increased, improve soil texture.
Contain abundant organic matter and nutrient in above a variety of organic fertilizers, it can improve soil culture fertility.But
It is animal dung/compound organic principle of wide variety of conventional contained in the above fertilizer, production first prepares addition not aspect, secondly fertilizer
Material applies inconvenience without processing, and effect is undesirable, can also there is the problems such as causing burn seedlings, heavy metal pollution.
Invention content
The main purpose of the present invention is to provide a kind of organic fertilizer, it is desirable to provide fertility is persistently, raw material obtains and processing
Simply, at low cost, the environment friendly and pollution-free fertilizer of high financial profit.
To achieve the above object, a kind of organic fertilizer provided by the invention includes the following component of each mass parts：Amino acid
35~75 parts of waste liquid, 5~20 parts of biochemical fulvic acid, 0.8~3 part of trace element, 10~20 parts of weathered coal humic acid, boron mud 0.1
~10 parts, 15~35 parts of a great number of elements, 0.3~1 part of synergist, 10~25 parts of filler.
On the basis of above-mentioned organic fertilizer compatibility, present invention further propose that the preparation method of above-mentioned organic fertilizer, packet
Include following steps：
Raw material is obtained according to the organic fertilizer ingredient；
The biochemical fulvic acid, trace element are added in amino acid waste liquid, 1~3h of stirring obtains premixing slurry；
The a great number of elements, weathered coal humic acid, boron mud, synergist, filler are added in the premixing slurry, fully
Slurry-spraying pelletizing after stirring.
The organic fertilizer of the present invention is primary raw material using amino acid waste liquid, provides a variety of amino acid, and rotten with biochemical Huang
Trace element in the double chelant ties of acid combination, then boron mud, mineral resources humic acid are added, synergist, rapid long-acting is combined, to make
Object provides lasting fertility；And raw material obtains and processing is simple, environment friendly and pollution-free, at low cost, high financial profit.
Specific implementation mode
The realization, the function and the advantages of the object of the present invention will be described further in conjunction with the embodiments.It should be appreciated that this
The described specific embodiment in place is only used to explain the present invention, is not intended to limit the present invention.
The present invention provides a kind of organic fertilizer, includes the following component of each mass parts：35~75 parts of amino acid waste liquid, biochemistry
5~20 parts of fulvic acid, 0.8~3 part of trace element, 10~20 parts of weathered coal humic acid, 0.1~10 part of boron mud, a great number of elements 15
~35 parts, 0.3~1 part of synergist, 10~25 parts of filler.
In the organic fertilizer ingredient of the present invention, the fertilizer nutrient of a great number of elements and trace element offer fertilizer basis equalization.
Wherein, a great number of elements includes two or more in urea, monoammonium phosphate, potassium sulfate, potassium chloride, ammonium sulfate；Trace element includes
It is one or more in zinc sulfate, ferrous sulfate, manganese sulfate, copper sulphate.A great number of elements base fertilizer is as absorbing for crop
A great number of elements (N/P/K) donor ensures total nutrient (N+ in fertilizer product to supplement a large amount of fertilizer elements of organic feed compositions
P2O5+K2O content)；Meanwhile the above middle Equilibrium of Trace Elements elements fed is supplemented except a great number of elements, enable crop according to
Ratio absorbs the utilization rate and yield for promoting fertilizer, single-element excessively caused antagonism and metabolic disorder is avoided, to ensure
The effect of fertilizer and the continuous growth of crop.
On the basis of the above organic principle, be in addition also collocated with boron mud and filler, wherein in the ingredient of boron mud comprising at
Dividing has magnesia 20%~40%, silica 20%~30%, diboron trioxide 0.5%~6%.Filler ingredient includes zeolite
It is one or more in powder, bentonite, diatomite.Boron mud and filler, first ingredient in addition to can supplement the boron of fertilizer, magnesium, silicon,
Except element necessary to the plant growths such as aluminium, calcium, on the one hand all it is that there is very good porous material, there is certain ratio
Surface can be used as carrier to have very good adsorptivity to other compositions in fertilizer, be conducive to promote fertilizer efficiency；On the other hand make
After being added for granulation ingredient, be conducive to be promoted the grain forming quality and after molding in the granulation process of fertiliser granulates
Mechanical strength.
Finally, synergist promotes the performance of whole fertilizer effect on the basis of above, synergist include carboxymethyl cellulose,
It is one or more in carboxyethyl cellulose, carboxy-propyl cellulose, polyvinyl alcohol.In the molecular structure of these types of polymer substance,
Functional group's (hydroxyl, carboxyl, carbonyl etc.) is enlivened containing more, and can be ionized and be generated charge and have ion exchange energy
Power, absorption nutrient ion are reduced and are lost in, more conducively fertilizer with certain nutrient, reduction dissociation of the nutrient from soil surface is loaded
The effect of ingredient, plays.And its high molecular rich carbon characteristic, has the function of increasing the quantity and stability of soil agreegate,
The content for improving organic carbon in soil and size fractionated aggregate, enhances the character and activity of soil, promote fertilizer holding and
It absorbs.
The above-mentioned organic fertilizer of the present invention is primary raw material using amino acid waste liquid, provides a variety of amino acid, and with biochemistry
Trace element in the double chelant ties of fulvic acid combination, then boron mud, mineral resources humic acid are added, synergist, rapid long-acting is combined,
Lasting fertility is provided for crop；And the elemental composition having is various, and containing abundant middle trace element, institute can be provided for crop
The elements such as calcium, magnesium, zinc, silicon, boron, the iron needed, cooperation humic acid, the use of small molecule organic carbon can supplement plant carbon nutrition, change
Kind crop rhizosphere environment, stimulates root growth, improves resistance, increases yield.And wherein contain amino acid and biochemical yellow corruption
The small molecules organic carbon such as acid is easy to crop absorption, and quick-acting carbon sources can be provided for crop, make crop Rapid Accumulation carbon nutrition, raising can
Dissolubility sugar, improves fruit quality.Weathered coal humic acid can improve soil for a long time, can also be provided for crop through edaphon effect
Carbon source, the fertilizer belong to a kind of organic fertilizer that rapid long-acting has both.
On the basis of above-mentioned organic fertilizer compatibility, present invention further propose that the preparation method of above-mentioned organic fertilizer, side
Method includes the following steps：
Biochemical fulvic acid, trace element are added in amino acid waste liquid by S10, stir 1~3h, obtain premixing slurry；
S20, the premixing that a great number of elements, weathered coal humic acid, boron mud, synergist, filler are added to step S10 are starched
In, after being sufficiently stirred rear slurry-spraying pelletizing.
Wherein in step slo, for the ease of more fully reaction bonded between ingredient, the condition being stirred to react can be with
Control 30 DEG C~60 DEG C conditions.
It can be seen that from the above method step process of the present invention and effectively solve the long-term stacking such as amino acid waste liquid, boron mud
Intractable problem using cheap amino acid waste liquid and adds biochemical fulvic acid chelated microelement, and adds mineral resources humic acid, big
Final organic fertilizer products are directly prepared by slurry-spraying pelletizing in secondary element, synergist and filler, and cost of material is low, warp
Ji high efficiency.
To make the preparation method details of the above-mentioned organic fertilizer of the present invention be more conducive to the understanding and implementation of those skilled in the art,
And the verification preparation-obtained organic fertilizer progressive effect of this case, come to the above-mentioned of this case below by way of specific embodiment
Content is illustrated.
Embodiment 1
S00, according to following ingredient than obtaining raw material in the embodiment 1：Biochemical fulvic acid 80kg, amino acid waste liquid
500kg, trace element (wait than zinc sulfate, ferrous sulfate, manganese sulfate) 10kg, weathered coal humic acid 120kg, boron mud 10kg,
A great number of elements (wait than monoammonium phosphate, potassium sulfate, ammonium sulfate) 200kg, carboxyethyl cellulose 3kg, bentonite 77kg；
80kg biochemical fulvic acids are first added to after being sufficiently stirred in the amino acid waste liquid of 500kg again by S01 in stirred tank
The trace element of 10kg is added, control temperature 50 C reacts 1h；
S02,120kg weathered coal humic acids, 10kg boron muds, 200kg a great number of elements, 3kg carboxyethyl celluloses, 77kg is swollen
Profit soil is added in stirred tank, mixes well rear slurry-spraying pelletizing.
Embodiment 2
S00, according to following ingredient than obtaining raw material in the embodiment 2：Biochemical fulvic acid 100kg, amino acid waste liquid
375kg, trace element (manganese sulfate:Copper sulphate:Ferrous sulfate mass ratio is 1:2:1) 15kg, weathered coal humic acid 100kg, boron
Mud 50kg, a great number of elements (urea:Monoammonium phosphate:Potassium sulfate mass ratio is 3:2:3) 175kg, carboxymethyl cellulose 3kg, poly- second
Enol 2kg, zeolite powder 50kg, diatomite 50kg, bentonite 25kg；
S01 is added micro after being first sufficiently stirred in amino acid waste liquid that biochemical fulvic acid is added in stirred tank
Element, control temperature 60 C react 1.5h；
Weathered coal humic acid, boron mud, a great number of elements, carboxyethyl cellulose, bentonite are added in stirred tank, fill by S02
Slurry-spraying pelletizing after point mixing.
Embodiment 3
S00, according to following ingredient than obtaining raw material in the embodiment 3：Biochemical fulvic acid 25kg, amino acid waste liquid
175kg, trace element (wait than zinc sulfate, ferrous sulfate, manganese sulfate, copper sulphate) 4kg, weathered coal humic acid 50kg, boron mud
0.5kg, a great number of elements (wait than urea, monoammonium phosphate, potassium sulfate, potassium chloride, ammonium sulfate) 75kg, carboxy-propyl cellulose
1.5kg, diatomite 25kg, bentonite 25kg；
S01 is added micro after being first sufficiently stirred in amino acid waste liquid that biochemical fulvic acid is added in stirred tank
Element, 30 DEG C of reaction 3h of control temperature；
Weathered coal humic acid, boron mud, a great number of elements, carboxyethyl cellulose, bentonite are added in stirred tank, fill by S02
Slurry-spraying pelletizing after point mixing.
Embodiment 4
S00, according to following ingredient than obtaining raw material in the embodiment 4：Biochemical fulvic acid 60kg, amino acid waste liquid
200kg, trace element (wait than zinc sulfate, ferrous sulfate, manganese sulfate, copper sulphate) 10kg, weathered coal humic acid 80kg, boron mud
10kg, a great number of elements (wait than zinc sulfate, ferrous sulfate, manganese sulfate, copper sulphate) 120kg, carboxymethyl cellulose 2kg, poly- second
Enol 1kg, zeolite powder 50kg, diatomite 50kg；
S01 is added micro after being first sufficiently stirred in amino acid waste liquid that biochemical fulvic acid is added in stirred tank
Element, control temperature 50 C react 2h；
Weathered coal humic acid, boron mud, a great number of elements, carboxyethyl cellulose, bentonite are added in stirred tank, fill by S02
Slurry-spraying pelletizing after point mixing.
Embodiment 5
S00, according to following ingredient than obtaining raw material in the embodiment 5：The amino acid of 80kg biochemical fulvic acids, 450kg
Waste liquid, the trace element (being same as above) of 10kg, 150kg weathered coal humic acids, 200kg a great number of elements (being same as above), 3kg polyvinyl alcohol,
97kg bentonites；
S01 is added micro after being first sufficiently stirred in amino acid waste liquid that biochemical fulvic acid is added in stirred tank
Element, 30 DEG C of reaction 1.5h of control temperature；
Weathered coal humic acid, boron mud, a great number of elements, carboxyethyl cellulose, bentonite are added in stirred tank, fill by S02
Slurry-spraying pelletizing after point mixing.
Organic fertilizer prepared by the above various embodiments carries out Quality Detection, testing result：Fertilizer total nutrient content is more than
5%, the content of organic matter is more than 45%, is subsequently used for agrochemical experiment, the fertilizer prepared in the embodiment is applied in packet
The Chinese cabbage of phase, usage amount are similarly 60kg per acre.In order to protrude its effect, made using the conventional compoiste fertilizer being granulated is mixed
For comparison, the yield result of Chinese cabbage is counted.As a result in, the cabbage yield using the fertilizer of the present embodiment is 3311.2kg/
Mu；The yield of comparison is 2968.2kg/ mus.
Equally, the fertilizer of above-mentioned preparation is further used for green cucumber again, the mode and dosage of fertilising are (conventional using every
50~60kg of mu) use usual manner and dosage；Also use conventional compoiste fertilizer as a comparison simultaneously, statistics knot
Fruit.From Comparative result, 5~10 days can be extended using the cucumber crop picking time of fertilizer manufactured in the present embodiment；And plantation
Cucumber plant growth period is without withered phenomenon；Further from the quantity and weight of the cucumber result finally counted, the relatively fertilizer of comparison
Expect 10% or more output increased；Cucumber taste top grade is of fine quality, tasty and refreshing not puckery.
It can be seen from the results above that the organic fertilizer of the present invention can effectively improve soil with organic matter content, it is crop
Carbon source is provided, improves soil hardening, improves soil aggregate structure, improves utilization rate of fertilizer, crop rhizosphere environment can be improved, make root
It is sturdy；Promote Nutrient Absorption, improve fruit quality, increases yield.
It these are only the preferred embodiment of the present invention, be not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (10)
1. a kind of organic fertilizer, which is characterized in that the following component including each mass parts：35~75 parts of amino acid waste liquid, biochemistry
5~20 parts of fulvic acid, 0.8~3 part of trace element, 10~20 parts of weathered coal humic acid, 0.1~10 part of boron mud, a great number of elements 15
~35 parts, 0.3~1 part of synergist, 10~25 parts of filler.
2. organic fertilizer as described in claim 1, which is characterized in that a great number of elements includes urea, monoammonium phosphate, sulfuric acid
Two or more in potassium, potassium chloride, ammonium sulfate.
3. organic fertilizer as claimed in claim 1 or 2, which is characterized in that the trace element includes zinc sulfate, sulfuric acid Asia
It is one or more in iron, manganese sulfate, copper sulphate.
4. organic fertilizer as claimed in claim 1 or 2, which is characterized in that the boron mud includes magnesia 20%~40%, two
Silica 20%~30%, diboron trioxide 0.5%~6%.
5. organic fertilizer as claimed in claim 1 or 2, which is characterized in that the filler includes zeolite powder, bentonite, diatom
It is one or more in soil.
6. organic fertilizer as claimed in claim 1 or 2, which is characterized in that the synergist includes carboxymethyl cellulose, carboxylic second
It is one or more in base cellulose, carboxy-propyl cellulose, polyvinyl alcohol.
7. organic fertilizer as described in claim 1, which is characterized in that the following component including each mass parts：Biochemical fulvic acid
80 parts, 500 parts of amino acid waste liquid, trace element 10 parts, 120 parts of weathered coal humic acid, 10 parts of boron mud, 200 parts of a great number of elements, carboxylic
3 parts of ethyl cellulose, 77 parts of bentonite.
8. organic fertilizer as described in claim 1, which is characterized in that the following component including each mass parts：Biochemical fulvic acid
80 parts, 450 parts of amino acid waste liquid, trace element 10 parts, 150 parts of weathered coal humic acid, 200 parts of a great number of elements, polyvinyl alcohol 3
Part, 97 parts of bentonite.
9. such as the preparation method of claim 1 to 8 any one of them organic fertilizer, which is characterized in that include the following steps：
Raw material is obtained according to claim 1 to 8 any one of them organic fertilizer ingredient；
The biochemical fulvic acid, trace element are added in amino acid waste liquid, 1~3h of stirring obtains premixing slurry；
The a great number of elements, weathered coal humic acid, boron mud, synergist, filler are added in the premixing slurry, are sufficiently stirred
Slurry-spraying pelletizing afterwards.
10. the preparation method of organic fertilizer as claimed in claim 9, which is characterized in that by the biochemical fulvic acid, micro member
Element is added in amino acid waste liquid, and 1~3h of stirring is obtained in premixing slurry step；
Described be stirred to react carries out in 30 DEG C~60 DEG C conditions.
Priority Applications (1)
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|---|---|---|---|
| CN201810259992.8A CN108409409A (en) | 2018-03-27 | 2018-03-27 | Organic fertilizer and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810259992.8A CN108409409A (en) | 2018-03-27 | 2018-03-27 | Organic fertilizer and preparation method thereof |
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| CN108409409A true CN108409409A (en) | 2018-08-17 |
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Family Applications (1)
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| CN201810259992.8A Pending CN108409409A (en) | 2018-03-27 | 2018-03-27 | Organic fertilizer and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110547065A (en) * | 2019-09-07 | 2019-12-10 | 正大农业科技(浙江)有限公司 | method for improving saline-alkali soil by using composite waste |
| CN111995466A (en) * | 2020-09-07 | 2020-11-27 | 嘉施利（眉山）化肥有限公司 | Efficient chelated liquid fertilizer and preparation method thereof |
| CN112645768A (en) * | 2020-12-31 | 2021-04-13 | 广东拉多美化肥有限公司 | Chemical fertilizer containing molybdenum fulvate and preparation method thereof |
| CN114804954A (en) * | 2022-04-29 | 2022-07-29 | 南京百阳垦生物技术有限责任公司 | Fulvic acid-containing urea and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110547065A (en) * | 2019-09-07 | 2019-12-10 | 正大农业科技(浙江)有限公司 | method for improving saline-alkali soil by using composite waste |
| CN110547065B (en) * | 2019-09-07 | 2022-01-25 | 正大农业科技(浙江)有限公司 | Method for improving saline-alkali soil by using composite waste |
| CN111995466A (en) * | 2020-09-07 | 2020-11-27 | 嘉施利（眉山）化肥有限公司 | Efficient chelated liquid fertilizer and preparation method thereof |
| CN112645768A (en) * | 2020-12-31 | 2021-04-13 | 广东拉多美化肥有限公司 | Chemical fertilizer containing molybdenum fulvate and preparation method thereof |
| CN114804954A (en) * | 2022-04-29 | 2022-07-29 | 南京百阳垦生物技术有限责任公司 | Fulvic acid-containing urea and preparation method thereof |
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Application publication date: 20180817 |