CN107840707A - Slow release fertilizer coating material and preparation method thereof and slow release fertilizer and preparation method thereof - Google Patents
Slow release fertilizer coating material and preparation method thereof and slow release fertilizer and preparation method thereof Download PDFInfo
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- CN107840707A CN107840707A CN201711073710.7A CN201711073710A CN107840707A CN 107840707 A CN107840707 A CN 107840707A CN 201711073710 A CN201711073710 A CN 201711073710A CN 107840707 A CN107840707 A CN 107840707A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
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Abstract
The invention provides a kind of slow release fertilizer coating material and preparation method thereof and slow release fertilizer and preparation method thereof, preparation method includes the preparation method of the first coated fertilizer and the preparation method of the second coated fertilizer；The preparation method of first coated fertilizer includes：1) starch is mixed with water, gelatinized corn starch is made；2) under the conditions of nitrogen is existing, expoxy propane mixing is added dropwise into gelatinized corn starch, is then placed under conditions of temperature is 45 55 DEG C after reacting 6 10h and stands, take precipitation drying, obtain modified starch；3) modified starch, polyvinyl alcohol, polypropylene and crosslinking agent are mixed, the first coated fertilizer is made；The preparation method of second coated fertilizer includes：I) bentonite is placed in the aqueous solution of sodium salt after soaking and filtered, take filter residue and drying, modified alta-mud is made；II it is calcined after) mixing shale powder, modified alta-mud and urea liquid, the second coated fertilizer is made.Realize the high effect of control fertilizer rate of release, environmental friendliness.
Description
Technical field
The present invention relates to slow release fertilizer field, especially, be related to a kind of slow release fertilizer coating material and preparation method thereof and
Slow release fertilizer and preparation method thereof.
Background technology
China is as large agricultural country and populous nation, it is necessary to support need of the huge population for grain with limited arable land
Ask.With being continuously increased for population, cultivated area can not be but further added by.Therefore, to be continuously increased with limited arable land to support
Population, realization continue efficiently to develop, fertilizer science and technology innovation and development there is important war for Agricultural Industrialization Development
Slightly meaning.And fertilizer is in use, fertilizer is directly entered in soil after fertilising, disposably provides substantial amounts of nutrient, and plant
The utilization of the nutrient of itself is lasting process, and unnecessary fertilizer can then be wasted, and causes the utilization rate of fertilizer relatively low, especially
The problem of loss especially severe during nitrogen fertilizer use.And utilization rate of fertilizer is low, not only directly economy is caused damage, and
And the fertilizer being lost in often enters in soil and water body, the problems such as causing earth's surface eutrophication, underground water seriously to pollute.
The content of the invention
Present invention aims at provide a kind of slow release fertilizer coating material and preparation method thereof and slow release fertilizer and its preparation
Method, to solve the disposable large supply of fertilizer after applying fertilizer, cause the utilization rate of fertilizer relatively low, cause not only directly to economy
Cause damage, and the fertilizer being lost in often enters in soil and water body, causes earth's surface eutrophication, underground water seriously to pollute
The problems such as.
To achieve the above object, the invention provides a kind of preparation method of slow release fertilizer coating material, wherein, the system
Preparation Method includes the preparation method of the first coated fertilizer and the preparation method of the second coated fertilizer；Wherein,
The preparation method of first coated fertilizer includes：1) starch is mixed with water, gelatinized corn starch is made；2) deposited in nitrogen
Under the conditions, expoxy propane mixing is added dropwise into gelatinized corn starch, is then placed under conditions of temperature is 45-55 DEG C and reacts 6-
Stood after 10h, take precipitation drying, obtain modified starch；3) modified starch, polyvinyl alcohol, polypropylene and crosslinking agent are mixed, system
Obtain the first coated fertilizer；
The preparation method of second coated fertilizer includes：I) bentonite is placed in in the aqueous solution of sodium salt mistake after soaking
Filter, takes filter residue and drying, and modified alta-mud is made；II it is calcined, is made after) mixing shale powder, modified alta-mud and urea liquid
Second coated fertilizer.
As preferable, in step 1), relative to the starch of 100 parts by weight, the dosage of water is 120-240 parts by weight；
Mixed process in step 1) is stirred to be placed under conditions of temperature is 60-80 DEG C.
As preferable, in step 2), relative to the gelatinized corn starch of 100 parts by weight, the dosage of expoxy propane is 2-6 weight
Part；
Mixed process is stirred 0.5-1.5h to be placed under conditions of temperature is 15-30 DEG C in step 2)；
The drop rate of expoxy propane is 50-150 drops/min.
As preferable, in step 3), relative to the modified starch of 100 parts by weight, the dosage of polyvinyl alcohol is 30-60 weights
Part is measured, polyacrylic dosage is 5-15 parts by weight, and the dosage of crosslinking agent is 5-10 parts by weight；
Crosslinking agent is selected from least one of maleic anhydride, glutaric anhydride, formaldehyde and potassium permanganate.
As preferable, step I) in, sodium salt is in sodium carbonate, sodium acid carbonate, sodium chloride, sodium nitrate and sodium sulphate
It is at least one；
And the concentration of sodium salt is 2-5mol/L.
As preferable, step II) in, relative to the shale powder of 100 parts by weight, the dosage of modified alta-mud is 30-40
Parts by weight, the dosage of urea liquid is 5-20 parts by weight；
The content of urea is 30-50 weight % in urea liquid.
A kind of slow release fertilizer coating material is additionally provided, wherein, the slow release fertilizer coating material is according to described above
Preparation method is made.
A kind of preparation method of slow release fertilizer is additionally provided, wherein, the preparation method includes：
A the second coated fertilizer) is coated into urea granules, coated particle is made；
B the first coated fertilizer) is coated into above-mentioned coated particle, slow release fertilizer is made；Wherein,
First coated fertilizer and second coated fertilizer are made according to preparation method described above, or according to
It is described above.
A kind of slow release fertilizer is additionally provided, wherein, the slow release fertilizer is made according to preparation method described above.
The invention has the advantages that：
The present invention reduces the glass transition temperature of starch, makes starch molecular chain to expoxy propane is added dropwise in starch
Diffusivity is greatly improved, and then causes starch granules expansion, crushes, and double-spiral structure therein is opened, and weakens wherein hydrogen
Active force between key, macromolecular are discharged, and starch crystallite is destroyed, and further destroy the phase interaction between starch molecule
With so that expoxy propane can be effectively modified to starch, further, by modified starch, polyvinyl alcohol, polypropylene and friendship
Join agent mixing so that the modified starch that above-mentioned strand is effectively destroyed can be with polyvinyl alcohol, poly- third in the presence of crosslinking agent
Alkene realizes crosslinking, and polyvinyl alcohol and modified starch are by cross-linking reaction in intermolecular formation space net structure, and starch is whole
It can be effectively filled into system in network structure, and form ionic bond, meanwhile, polypropylene acts on modified starch in crosslinking agent
Lower generation graft reaction, polypropylene form ionic bond during graft crosslinking and produce increase-volume, meanwhile, modified starch is grafted to
In polypropylene chains structure, further, one end is hydrophilic on polyvinyl alcohol, one end oleophylic, enters between modified starch and polypropylene
One step plays " bridging " effect, while the compatibility of above-mentioned material is improved, further improves the mechanics of above-mentioned graft materials
Performance so that the first coated fertilizer obtained through aforesaid way can effectively be coated to fertilizer, and environmentally friendly degree is high, and
And it is controllable by the raising of its mechanical property its caking property etc., and then release can be slowly decomposed in soil, from
And realize the effect that the fertilizer of cladding slowly discharges.
Further, bentonite is placed in the aqueous solution of sodium salt and soaked, increase interlamellar spacing, formation has micropore
Network, its specific surface area is increased, so as to improve its water imbibition and plasticity, then it is mixed with shale powder and urea,
Shale powder has substantial amounts of poriform gap structure, and its specific surface area is big, can effective fixed nitrogen, by the mixing with urea, effectively
Ground adsorbs to the nitrogen in urea, and using urea as binding agent, bentonite and shale powder after sodium salt is soaked can effectively glue
Knot, and nitrogen is fixed, the factor such as content of the nitrogen in environment slowly discharges so that above-mentioned second coated fertilizer
Further improve the covering property to fertilizer.So as to by the collective effect of above-mentioned first coated fertilizer and the second coated fertilizer,
Enable the coated fertilizer to realize slow decomposition in soil, and then the fertilizer of cladding is slowly discharged；Meanwhile above-mentioned material
Expect that environmental friendliness is high, on the premise of the utilization rate of fertilizer is improved, can not only reduce fertilizer discharge in itself it is too fast to environment
Pollution, meanwhile, the decomposition of the coated fertilizer in itself can't also cause the pollution to environment.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages.
The present invention is further detailed explanation below.
Embodiment
Embodiments of the invention are described in detail below, but the present invention can be limited and covered according to claim
Multitude of different ways implement.
The invention provides a kind of preparation method of slow release fertilizer coating material, wherein, the preparation method includes first
The preparation method of the preparation method of coated fertilizer and the second coated fertilizer；Wherein,
The preparation method of first coated fertilizer includes：1) starch is mixed with water, gelatinized corn starch is made；2) deposited in nitrogen
Under the conditions, expoxy propane mixing is added dropwise into gelatinized corn starch, is then placed under conditions of temperature is 45-55 DEG C and reacts 6-
Stood after 10h, take precipitation drying, obtain modified starch；3) modified starch, polyvinyl alcohol, polypropylene and crosslinking agent are mixed, system
Obtain the first coated fertilizer；
The preparation method of second coated fertilizer includes：I) bentonite is placed in in the aqueous solution of sodium salt mistake after soaking
Filter, takes filter residue and drying, and modified alta-mud is made；II it is calcined, is made after) mixing shale powder, modified alta-mud and urea liquid
Second coated fertilizer.
The invention has the advantages that：The present invention reduces the vitrifying of starch to expoxy propane is added dropwise in starch
Transition temperature, the diffusivity of starch molecular chain is greatly improved, and then cause starch granules expansion, broken, double spiral shells therein
Revolve structure to open, weaken the active force between wherein hydrogen bond, macromolecular is discharged, and starch crystallite is destroyed, and is further broken
The interaction being broken between starch molecule so that expoxy propane can be effectively modified to starch, further, be formed sediment modified
Powder, polyvinyl alcohol, polypropylene and crosslinking agent mixing so that work of the modified starch that above-mentioned strand is effectively destroyed in crosslinking agent
It can realize and be crosslinked with polyvinyl alcohol, polypropylene under, polyvinyl alcohol forms sky by cross-linking reaction with modified starch intermolecular
Between network structure, starch effectively can be filled into network structure in whole system, and forms ionic bond, meanwhile, polypropylene
Graft reaction occurs under crosslinking agent effect with modified starch, polypropylene forms ionic bond during graft crosslinking and produces increasing
Hold, meanwhile, modified starch is grafted in polypropylene chains structure, and further, one end is hydrophilic on polyvinyl alcohol, one end oleophylic,
" bridging " effect is further functioned as between modified starch and polypropylene, while the compatibility of above-mentioned material is improved, further
Improve the mechanical property of above-mentioned graft materials so that the first coated fertilizer obtained through aforesaid way can effectively be wrapped to fertilizer
Cover, and environmentally friendly degree is high, and it is controllable by the raising of its mechanical property its caking property etc., and then can be in soil
Release can be slowly decomposed in earth, so as to realize effect that the fertilizer of cladding slowly discharges；Further, bentonite is placed in sodium salt
The aqueous solution in soaked, increase interlamellar spacing, formation there is micropore network, its specific surface area is increased, so as to carry
High its water imbibition and plasticity, then it is mixed with shale powder and urea, shale powder has substantial amounts of poriform gap structure, its
Specific surface area is big, can effective fixed nitrogen, by the mixing with urea, effectively the nitrogen in urea is adsorbed, using urea as
Binding agent, bentonite and shale powder after sodium salt is soaked can be bonded effectively, and nitrogen is fixed, the nitrogen in environment
The factors such as the content of element slowly discharge so that above-mentioned second coated fertilizer further improves the covering property to fertilizer.So as to logical
Cross the collective effect of above-mentioned first coated fertilizer and the second coated fertilizer so that the coated fertilizer can be realized in soil slowly to be divided
Solution, and then the fertilizer of cladding is slowly discharged；Meanwhile above-mentioned material environmental friendliness is high, the utilization rate of fertilizer is being improved
On the premise of, fertilizer can not only be reduced and discharge the too fast pollution to environment in itself, meanwhile, the decomposition of the coated fertilizer in itself is also simultaneously
The pollution to environment will not be caused.
The dosage of above-mentioned raw materials can select in wide scope, for example, in a kind of preferred embodiment, step 1)
In, relative to the starch of 100 parts by weight, the dosage of water is 120-240 parts by weight；Further, the mixed process in step 1)
It is stirred to be placed under conditions of temperature is 60-80 DEG C.
In further preferred embodiment, in step 2), relative to the gelatinized corn starch of 100 parts by weight, the use of expoxy propane
Measure as 2-6 parts by weight；Mixed process is stirred 0.5-1.5h to be placed under conditions of temperature is 15-30 DEG C in step 2)；Ring
The drop rate of Ethylene Oxide is 50-150 drops/min.
In the embodiment being more highly preferred to, in step 3), relative to the modified starch of 100 parts by weight, the use of polyvinyl alcohol
It is 5-15 parts by weight to measure as 30-60 parts by weight, polyacrylic dosage, and the dosage of crosslinking agent is 5-10 parts by weight；Crosslinking agent is selected from
At least one of maleic anhydride, glutaric anhydride, formaldehyde and potassium permanganate.
Above-mentioned sodium salt can select in wide scope, for example, in a kind of preferred embodiment, step I) in, sodium salt
Selected from least one of sodium carbonate, sodium acid carbonate, sodium chloride, sodium nitrate and sodium sulphate；And the concentration of sodium salt is 2-5mol/L.
In further preferred embodiment, step II) in, relative to the shale powder of 100 parts by weight, modified alta-mud
Dosage is 30-40 parts by weight, and the dosage of urea liquid is 5-20 parts by weight；The content of urea is 30-50 weights in urea liquid
Measure %.
A kind of slow release fertilizer coating material is additionally provided, wherein, the slow release fertilizer coating material is according to upper
Described preparation method is stated to be made.
A kind of preparation method of slow release fertilizer is additionally provided, wherein, the preparation method includes：
A the second coated fertilizer) is coated into urea granules, coated particle is made；
B the first coated fertilizer) is coated into above-mentioned coated particle, slow release fertilizer is made；Wherein,
First coated fertilizer and second coated fertilizer are made according to preparation method described above, or according to
It is described above.
A kind of slow release fertilizer is additionally provided, wherein, the slow release fertilizer is made according to preparation method described above.
It is specific embodiment below.
Embodiment 1
1) 100 weight starch are placed under conditions of temperature is 60 DEG C with 120 parts by weight water and be stirred, starch is made
Paste；2) under the conditions of existing for nitrogen, 2 parts by weight are added dropwise to 50 drops/min drop rate in being pasted to 100 weight starch
Expoxy propane is simultaneously stirred 0.5h under conditions of 15 DEG C, is then placed under conditions of temperature is 45 DEG C after reacting 6h and stands,
Precipitation drying is taken, obtains modified starch；3) by 100 part by weight modified starch, 30 weight account polyethylene alcohol, 5 parts by weight of polypropylene
Mixed with 5 parts by weight maleic anhydride, the first coated fertilizer A11 is made；
I) bentonite is placed in the aqueous solution (concentration 3mol/L) of sodium carbonate after soaking and filtered, take filter residue and drying, made
Obtain modified alta-mud；II) by 100 parts by weight shale powders, 30 part by weight modified bentonites and 5 parts by weight of urea solution (urea
Content is 40 weight %) mixing after be calcined, be made the second coated fertilizer A12.
Embodiment 2
1) 100 weight starch are placed under conditions of temperature is 80 DEG C with 240 parts by weight water and be stirred, starch is made
Paste；2) under the conditions of existing for nitrogen, 6 parts by weight are added dropwise to 150 drops/min drop rate in being pasted to 100 weight starch
Expoxy propane is simultaneously stirred 1.5h under conditions of 30 DEG C, is then placed under conditions of temperature is 55 DEG C after reacting 10h and stands,
Precipitation drying is taken, obtains modified starch；3) by 100 part by weight modified starch, 60 weight account polyethylene alcohol, 15 parts by weight of polypropylene
Mixed with 10 parts by weight maleic anhydride, the first coated fertilizer A21 is made；
I) bentonite is placed in the aqueous solution (concentration 3mol/L) of sodium carbonate after soaking and filtered, take filter residue and drying, made
Obtain modified alta-mud；II) by 100 parts by weight shale powders, 40 part by weight modified bentonites and 20 parts by weight of urea solution (urea
Content is 40 weight %) mixing after be calcined, be made the second coated fertilizer A22.
Embodiment 3
1) 100 weight starch are placed under conditions of temperature is 70 DEG C with 180 parts by weight water and be stirred, starch is made
Paste；2) under the conditions of existing for nitrogen, 4 parts by weight are added dropwise to 100 drops/min drop rate in being pasted to 100 weight starch
Expoxy propane is simultaneously stirred 1h under conditions of 25 DEG C, is then placed under conditions of temperature is 50 DEG C after reacting 8h and stands, takes
Drying is precipitated, obtains modified starch；3) by 100 part by weight modified starch, 50 weight account polyethylene alcohol, 10 parts by weight of polypropylene and
8 parts by weight of formaldehyde mix, and the first coated fertilizer A31 is made；
I) bentonite is placed in the aqueous solution (concentration 3mol/L) of sodium carbonate after soaking and filtered, take filter residue and drying, made
Obtain modified alta-mud；II) by 100 parts by weight shale powders, 35 part by weight modified bentonites and 10 parts by weight of urea solution (urea
Content is 40 weight %) mixing after be calcined, be made the second coated fertilizer A32.
Embodiment 4
Prepare as described in Example 1, unlike, the dosage of step 2) oxypropylene is 1 parts by weight, and drop rate is
200 drops/min, the first coated fertilizer A41 is made.Second coated fertilizer is A12 with embodiment 1.
Embodiment 5
Prepare as described in Example 2, unlike, in step 3), the dosage of polyvinyl alcohol is 10 parts by weight, polyacrylic
Dosage is 2 parts by weight, and the dosage of maleic anhydride is 2 parts by weight, and the first coated fertilizer A51 is made.Second coated fertilizer is the same as implementation
Example 2, it is A22.
Embodiment 6
Prepare as described in Example 3, unlike, step II) in, the dosage of modified alta-mud is 20 parts by weight, urea
The dosage of solution is 2 parts by weight, and the second coated fertilizer A62 is made.First coated fertilizer is A31 with embodiment 3.
Comparative example 1
Prepare as described in Example 1, unlike, without step 1) and step 2), directly use starch and polyethylene
Alcohol, polypropylene and crosslinking agent mixing, are made the first coated fertilizer B11；Without step I), directly using bentonite, it is made the
Two coated fertilizer B21.
Comparative example 2
Prepare as described in Example 2, unlike, polyvinyl alcohol and maleic anhydride are added without, the first coated fertilizer is made
B21；Shale powder is added without, the second coated fertilizer B22 is made.
Test data
Every group takes 10g urea granules, and the second coated fertilizer in above-mentioned coated fertilizer is each coated into each group urea granules,
Coated particle is obtained, then the first coated fertilizer is coated into above-mentioned coated particle, slow release fertilizer is made.By above-mentioned slow release fertilizer and
The pure urea granules of 10g are each placed in water immersion, according to GB/T2441.1《The measure of determination of urea total nitrogen content》Detection
The urea content of dissolution in 1d, 5d, 7d and 15d water.As a result it is as shown in the table.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (9)
1. a kind of preparation method of slow release fertilizer coating material, it is characterised in that the preparation method includes the first coated fertilizer
Preparation method and the second coated fertilizer preparation method；Wherein,
The preparation method of first coated fertilizer includes：1) starch is mixed with water, gelatinized corn starch is made；2) existing for nitrogen
Under the conditions of, expoxy propane mixing is added dropwise into gelatinized corn starch, is then placed under conditions of temperature is 45-55 DEG C after reacting 6-10h
Stand, take precipitation drying, obtain modified starch；3) modified starch, polyvinyl alcohol, polypropylene and crosslinking agent are mixed, is made the
One coated fertilizer；
The preparation method of second coated fertilizer includes：I) bentonite is placed in the aqueous solution of sodium salt after soaking and filtered, taken
Filter residue and drying, modified alta-mud is made；II it is calcined after) mixing shale powder, modified alta-mud and urea liquid, the second bag is made
Membrane material.
2. preparation method according to claim 1, it is characterised in that in step 1), relative to the starch of 100 parts by weight,
The dosage of water is 120-240 parts by weight；
Mixed process in step 1) is stirred to be placed under conditions of temperature is 60-80 DEG C.
3. preparation method according to claim 2, it is characterised in that in step 2), relative to the starch of 100 parts by weight
Paste, the dosage of expoxy propane is 2-6 parts by weight；
Mixed process is stirred 0.5-1.5h to be placed under conditions of temperature is 15-30 DEG C in step 2)；
The drop rate of expoxy propane is 50-150 drops/min.
4. preparation method according to claim 3, it is characterised in that in step 3), modified relative to 100 parts by weight is formed sediment
Powder, the dosage of polyvinyl alcohol is 30-60 parts by weight, and polyacrylic dosage is 5-15 parts by weight, and the dosage of crosslinking agent is 5-10 weights
Measure part；
Crosslinking agent is selected from least one of maleic anhydride, glutaric anhydride, formaldehyde and potassium permanganate.
5. preparation method according to claim 1, it is characterised in that step I) in, sodium salt is selected from sodium carbonate, bicarbonate
At least one of sodium, sodium chloride, sodium nitrate and sodium sulphate；
And the concentration of sodium salt is 2-5mol/L.
It is 6. according to claim 1, it is characterised in that step II) in, it is swollen relative to the shale powder of 100 parts by weight, modification
The dosage of profit soil is 30-40 parts by weight, and the dosage of urea liquid is 5-20 parts by weight；
The content of urea is 30-50 weight % in urea liquid.
7. a kind of slow release fertilizer coating material, it is characterised in that the slow release fertilizer coating material is any according to claim 1-6
Preparation method described in one is made.
8. a kind of preparation method of slow release fertilizer, it is characterised in that the preparation method includes：
A the second coated fertilizer) is coated into urea granules, coated particle is made；
B the first coated fertilizer) is coated into above-mentioned coated particle, slow release fertilizer is made；Wherein,
The preparation method system of first coated fertilizer and second coated fertilizer according to claim 1-6 any one
, or according to claim 7.
9. a kind of slow release fertilizer, it is characterised in that the slow release fertilizer preparation method according to claim 8 is made.
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| CN108911845A (en) * | 2018-07-26 | 2018-11-30 | 广西田阳县创新农业综合开发有限公司 | A kind of mango Special slow release fertilizer and preparation method thereof |
| CN109053290A (en) * | 2018-09-29 | 2018-12-21 | 广西乐业县乐宝电子商务有限公司 | A kind of compound fertilizer and preparation method thereof postponing the Kiwi berry collecting period |
| CN109220466A (en) * | 2018-09-29 | 2019-01-18 | 广西乐业县乐宝电子商务有限公司 | A kind of cultural method extending the Kiwi berry collecting period |
| CN112514749A (en) * | 2020-11-30 | 2021-03-19 | 广西壮族自治区农业科学院 | Intercropping, interplanting and crop rotation planting method for corn, green manure and potatoes |
| CN115517151A (en) * | 2022-06-28 | 2022-12-27 | 广州珠江建设发展有限公司 | Lawn planting matrix and preparation method thereof |
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| CN108911845A (en) * | 2018-07-26 | 2018-11-30 | 广西田阳县创新农业综合开发有限公司 | A kind of mango Special slow release fertilizer and preparation method thereof |
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| CN109220466A (en) * | 2018-09-29 | 2019-01-18 | 广西乐业县乐宝电子商务有限公司 | A kind of cultural method extending the Kiwi berry collecting period |
| CN112514749A (en) * | 2020-11-30 | 2021-03-19 | 广西壮族自治区农业科学院 | Intercropping, interplanting and crop rotation planting method for corn, green manure and potatoes |
| CN115517151A (en) * | 2022-06-28 | 2022-12-27 | 广州珠江建设发展有限公司 | Lawn planting matrix and preparation method thereof |
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Application publication date: 20180327 |