CN105948891A - High-efficiency water-retaining blended fertilizer and production method thereof - Google Patents
High-efficiency water-retaining blended fertilizer and production method thereof Download PDFInfo
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- CN105948891A CN105948891A CN201610272981.4A CN201610272981A CN105948891A CN 105948891 A CN105948891 A CN 105948891A CN 201610272981 A CN201610272981 A CN 201610272981A CN 105948891 A CN105948891 A CN 105948891A
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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
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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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
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
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- Organic Chemistry (AREA)
- Pest Control & Pesticides (AREA)
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Abstract
The invention discloses a high-efficiency water-retaining blended fertilizer and a production method thereof. The raw materials of the fertilizer are as the following, by weight: 15-20% of urea, 8-10% of diammonium phosphate, 12-18% of potassium sulfate, 0.1-0.2% of borax, 0.05-0.1% of zinc sulfate, 10-15% of polyacrylamide, and 37-55% of clay. With the raw materials, a multifunctional novel fertilizer with a water-retaining function, fertilizer effect and a soil-improving function is formed. The high-efficiency water-retaining blended fertilizer is safe and environment-friendly, and is nontoxic and odorless. The fertilizer does not pollute plants, soil, groundwater and the like. The fertilizer leaves no residue organic or inorganic harmful substance. The blended fertilizer is suitable for mechanical fertilization, and can be applied to various crops and soils. The blended fertilizer can repeatedly absorb and store fertilizer and water, and can slowly release the fertilizer and water during drought. With the blended fertilizer, crop drought resistance can be enhanced, and nutrient balance can be coordinated. Fertilizer and water utilization rate can be improved, and crop yield can be significantly improved.
Description
Technical field
The invention belongs to technical field of fertilizers, be specifically related to a kind of highly effective water-keeping bulk blended fertilizer and production method thereof.
Background technology
China's gross amount of water resources occupies the 6th, the world, but water resource of per capita is the 1/4 of whole world average level,
Come the 121st, the world, be one of 13 poor-water countries of the world.And China's central and west regions serious water shortage,
Drought-resistant agriculture area more than 7,000 ten thousand hectares, the 55% of annual precipitation～65% is evaporated, agricultural production
Being severely impacted, ecological environment goes from bad to worse.
Relevant study into according to what the Ministry of Agriculture " China Three major grain crops utilization rate of fertilizer research report " issued
Fruit shows, current China Oryza sativa L., Semen Maydis, Semen Tritici aestivi Three major grain crops nitrogenous fertilizer, phosphate fertilizer and potash fertilizer this season are average
Utilization rate is respectively 33%, 24%, 42%.Wherein, Semen Tritici aestivi nitrogenous fertilizer, phosphate fertilizer, potassium utilization rate are respectively
32%, 19%, 44%, nitrogen fertilizer for paddy rice, phosphate fertilizer, potassium utilization rate are respectively 35%, 25%, 41%, jade
Rice nitrogenous fertilizer, phosphate fertilizer, potassium utilization rate are respectively 32%, 25%, 43%.China's staple food crop at present
Utilization rate of fertilizer is still within relatively low level, also has bigger room for promotion.
In order to improve liquid manure utilization ratio, need to assemble production highly effective water-keeping bulk blended fertilizer to adapt to produce needs.
At present, at China's water keeping fertilizer research, application development rapidly, market demand is very big, but production capacity is very
Little, the product function produced is less, performance is low, water keeping fertilizer cost of manufacture height, complex manufacturing technology,
The problems such as pollution, show as the field application moisture absorption expensive, easy and are difficult to solve the problem that mechanization uses.
Not using the technology of mechanization accurate fertilizing in prior art, common water-retaining agent applies fertilizer at massive mechanical
During easily there is the moisture absorption, cause feed opening blocking cannot apply fertilizer.And existing water-retaining agent fertilizer ratio is big,
Water-saving effect can be reduced；Existing water-retaining agent fertilizer ratio is little, then need extra in the planting process in later stage
Fertilising, increases the cost of artificially applying fertilizer.And water-retention fertilizer granulation outcome of the prior art is uneven, shape
Different.Therefore need badly establishment good product performance, have multi-functional highly effective water-keeping bulk blended fertilizer production technology with
Product.Inventor is on the basis of for many years to the research of high-performance water-retaining agent and pilot production, it then follows technology is first
Enter, process is simple, water conservation Technology for Bulk Blending Fertilizer is filled by economical rationality, the principle of system optimal
Divide research, complete the present invention.
Summary of the invention
For water keeping fertilizer moisture-sensitive present in prior art and be not suitable with the problem that mechanization uses, this
Bright purpose is to provide a kind of highly effective water-keeping bulk blended fertilizer and production method thereof, for high-volume water keeping fertilizer
Production provides technical support.
The technical scheme that the present invention takes is:
A kind of highly effective water-keeping bulk blended fertilizer, feed components is as follows according to percentage by weight composition:
Carbamide 15～20%, Diammonium phosphate (DAP) 8～10%, potassium sulfate 12～18%, Borax 0.1～0.2%, zinc sulfate
0.05～0.1%, polyacrylamide 10～15%, clay 37～55%.
Further, also comprise trace element, i.e. trace element-selenium, trace elements iron, microelements of calcium,
One or more in trace element molybdenum, trace iodine.
Further, the dose of described bulk blended fertilizer is 12-16kg/667m2。
The production method of a kind of highly effective water-keeping bulk blended fertilizer, specifically includes following steps:
(1) preparation fertilizer solution:
Carbamide, Diammonium phosphate (DAP), potassium sulfate, Borax, zinc sulfate are added to by weight ratio in neutralization still,
Then according to the weight ratio of above-mentioned substance and water is that 1:1.5～2 adds water, it is sufficiently stirred for dissolving, obtains one
Plant fertilizer solution；
(2) polyacrylamide is added:
Take polyacrylamide according to weight proportion, the fertilizer solution in step (1) add polyacrylamide,
Then according to the weight ratio of above-mentioned substance and water is that 1:6～9 adds water, it is sufficiently stirred for dissolving, obtains one
Fertilizer and polyacrylamide are blended aqueous solution；
(3) clay is added:
Take clay according to weight proportion, interpolation is blended in aqueous solution to step (2) fertilizer and polyacrylamide glutinous
Soil, then according to the weight ratio of above-mentioned substance and water is that 1:1～3 adds water, is sufficiently stirred for dissolving, obtains
A kind of multiple sludge material uniformly wraps up the mixture of polyacrylamide；
(4) granulating and drying:
The mixture obtained in step (3) is sent into comminutor and carries out pelletize, then got by sifted
Particle diameter is the granule of 4～6mm, then granule is sent in microwave dryer, is dried to obtain highly effective water-keeping and mixes
Complex fertilizer material.
Further, in described step (4), microwave dryer is dried under conditions of temperature 105～130 DEG C
15～25min.
The invention have the benefit that
Highly effective water-keeping bulk blended fertilizer prepared by the present invention, is by clay, polyacrylamide and various nutrient elements
Fertilizer blends and forms through pelletize, and water-retaining agent usage amount is moderate, and by supporting combinations such as fertilizer and machinery, the moisture absorptions,
Define an existing water retaining function, again have fertilizer efficiency, also have improve soil function polyfunctional novel fertilizer
Material product, adapts to mechanization large-scale production, and this highly effective water-keeping bulk blended fertilizer acid-base value is moderate, for neutrality,
Safety and environmental protection, nonpoisonous and tasteless, not Pollution Plant, soil and groundwater etc., organic and inorganic without any residual
Harmful substance.
Highly effective water-keeping bulk blended fertilizer nutrient prepared by the present invention is comprehensive, concentration is high, volume increase abridged edition is notable, for
Property strong, processing simplicity, the addition of clay, it is ensured that the pelletize of fertilizer is uniform, it is to avoid fertilizer polygon etc.
Other profiled shape, production cost is low, pollution-free, and formula is flexible, can be according to crop alimentary, soil fertility
With the difference of the condition such as yield level and change flexibly, compensate for general universal water-retention fertilizer and join because of fixing nutrient
Compare and easily cause the shortcoming that certain nutrient is not enough or superfluous.
This bulk blended fertilizer adapts to mechanized application, control is fertile effective, it is to avoid coated slow release fertilizer is at surface water
In the case of flow is big, fertilizer efficiency runs off.The synergism of component, adsorbs various nutrient elements in granular fertilizer,
Had good sustained release effect, can be suitable for various crop, multiple soil, has and repeatedly absorbs, stores rich water, during arid
The most slowly discharge the function of rich water, the drought-resistant ability of crops can be strengthened, reach to coordinate nutrient balance, improve
Fertilizer and WUEL, dramatically increase the purpose of the yield of crops.
Detailed description of the invention
Embodiment 1
A kind of highly effective water-keeping bulk blended fertilizer, it is characterised in that feed components forms such as according to percentage by weight
Under:
Carbamide 15%, Diammonium phosphate (DAP) 8%, potassium sulfate 12%, Borax 0.1%, zinc sulfate 0.05%, polyacrylamide
Amine 10%, clay 37%.
Embodiment 2
A kind of highly effective water-keeping bulk blended fertilizer, it is characterised in that feed components forms such as according to percentage by weight
Under:
Carbamide 18%, Diammonium phosphate (DAP) 9%, potassium sulfate 16%, Borax 0.15%, zinc sulfate 0.08%, polyacrylamide
Amine 13%, clay 45%.
Highly effective water-keeping Bulk Blending Fertilizer is obtained, itself and the land for growing field crops pair of common Bulk Blending Fertilizer according to the preparation of raw material of embodiment 2
According to test, test site is in Qingdao Agricultural University experimental plot.
Wheat leaf chlorophyll contents (SPAD value) under table 1 different disposal
| May 14 | May 28 | June 4 | |
| Common water-retention fertilizer | 50 | 51 | 45 |
| Highly effective water-keeping Bulk Blending Fertilizer | 54 | 55 | 53 |
The wheat leaf verdazulene using highly effective water-keeping Bulk Blending Fertilizer as can be seen from Table 1 will be more than using common water-retention fertilizer
Processing, this explanation is used efficient Bulk Blending Fertilizer and can well be improved the chlorophyll content of Semen Tritici aestivi.
The impact on winter wheat yields of table 2 different disposal
| Comparison | 383.18kg/667m2 |
| Process | 453.54kg/667m2 |
The data of table 2 show, the different disposal impact on winter wheat yields.Can be seen that from the data of table 2
Using highly effective water-keeping Bulk Blending Fertilizer wheat yield is 453.54kg/667m2, it is higher than the yield using Bulk Blending Fertilizer
Go out 18.3.%.Highly effective water-keeping Bulk Blending Fertilizer can well magnitude relationship between coordinate production constituent element, from
And make Semen Tritici aestivi obtain high yield.
Embodiment 3
A kind of highly effective water-keeping bulk blended fertilizer, it is characterised in that feed components forms such as according to percentage by weight
Under:
Carbamide 20%, Diammonium phosphate (DAP) 10%, potassium sulfate 18%, Borax 0.2%, zinc sulfate 0.1%, polyacrylamide
Amine 15%, clay 55%.
Embodiment 4:
The production method of a kind of highly effective water-keeping bulk blended fertilizer, specifically includes following steps:
(1) preparation fertilizer solution
By 100 kilograms of volumes of production, by 16 kilograms of carbamide, Diammonium phosphate (DAP) 9 kilograms, potassium sulfate 13 kilograms,
Add to after the mixing of Borax 0.1 kilogram, 0.1 kilogram of zinc sulfate in neutralization still, then according to above-mentioned substance and water
Weight ratio be that 1:1.5 adds water, be sufficiently stirred for dissolve, obtain fertilizer solution.
(2) polyacrylamide is added
In aqueous fertilizer solution obtained above add polyacrylamide 10 kilograms, then according to above-mentioned substance with
The weight ratio of water is that 1:7 adds water, is sufficiently stirred for dissolving, and obtains a kind of fertilizer and is blended with polyacrylamide
Aqueous solution；
(3) clay is added
Interpolation clay 51.8 kilogram is blended in aqueous solution toward fertilizer obtained above and polyacrylamide, then presses
Weight ratio according to above-mentioned substance Yu water is that 1:2 adds water, is sufficiently stirred for dissolving, and obtains a kind of multiple sludge material
Uniformly wrap up the mixture of polyacrylamide；
(4) granulating and drying
Mixture obtained above is sent into comminutor and carries out pelletize, then got containing by sifted
State the granule that particle diameter is 4～6mm of highly effective water-keeping bulk blended fertilizer, then described granule is sent into microwave and do
In dry machine, under conditions of temperature 105～130 DEG C, it is dried 15～25min, obtains described highly effective water-keeping and mix
Complex fertilizer material.
Highly effective water-keeping bulk blended fertilizer obtained above is carried out corn growth test, on cost puts into phase
Same principle selects the Bulk Blending Fertilizer of the regular manufacturer production in market as control treatment.Test site is Qingdao agricultural
University proving ground, arranges 2 process, is respectively comparison (common Bulk Blending Fertilizer of equal value): 52.3kg/667m2,
Process (highly effective water-keeping Bulk Blending Fertilizer) 15.3kg/667m2, plot area 40m2, it is repeated 3 times, all fertilizer
All the method for ditch spread is used disposably to apply as base fertilizer.Respectively at JIUYUE in 2015 5 days, JIUYUE 16 days,
JIUYUE carries out index of correlation mensuration on 27th.Soil water content earth boring auger takes 0-40cm soil sample and uses oven drying method
Measure；Chlorophyll content uses SPAD-502 chlorophyll meter to measure.
The soil moisture water content (%) of Semen arachidis hypogaeae under table 3 different disposal
As shown in Table 3, cost put into identical in the case of, use highly effective water-keeping Bulk Blending Fertilizer to compare use
Common Bulk Blending Fertilizer can keep higher soil water content, beneficially corn growth.
The chlorophyll content in leaf blades of Semen Maydis under table 4 different disposal
| JIUYUE 5 days | JIUYUE 16 days | JIUYUE 27 days | |
| Comparison | 41.5 | 31.6 | 25.6 |
| Process | 56.7 | 53.9 | 45.1 |
As shown in Table 4, cost put into identical in the case of, use highly effective water-keeping Bulk Blending Fertilizer to compare use
Common Bulk Blending Fertilizer can keep higher chlorophyll content in leaf blades and decline relatively slow, beneficially corn growth.
In terms of final yield result, the corn yield using highly effective water-keeping Bulk Blending Fertilizer to process is
511.66kg/667m2, the comparison yield using common Bulk Blending Fertilizer is 490.35kg/667m2, therefore use height
Effect water conservation Bulk Blending Fertilizer can obtain higher yield.
Embodiment 2:
The production method of a kind of highly effective water-keeping bulk blended fertilizer, specifically includes following steps:
(1) preparation fertilizer solution
By 100 kilograms of volumes of production, by 17 kilograms of carbamide, Diammonium phosphate (DAP) 8 kilograms, potassium sulfate 15 kilograms,
Add to after the mixing of Borax 0.1 kilogram, 0.1 kilogram of zinc sulfate in neutralization still, then according to above-mentioned substance and water
Weight ratio be that 1:1.6 adds water, be sufficiently stirred for dissolve, obtain fertilizer solution；
(2) polyacrylamide is added
In aqueous fertilizer solution obtained above add polyacrylamide 11 kilograms, then according to above-mentioned substance with
The weight ratio of water is that 1:7 adds water, is sufficiently stirred for dissolving, and obtains a kind of fertilizer and is blended with polyacrylamide
Aqueous solution；
(3) clay is added
Interpolation clay 48.8 kilogram is blended in aqueous solution toward fertilizer obtained above and polyacrylamide, then presses
Weight ratio according to above-mentioned substance Yu water is that 1:2 adds water, is sufficiently stirred for dissolving, and obtains a kind of multiple sludge material
Uniformly wrap up the mixture of polyacrylamide；
(4) granulating and drying
Mixture obtained above is sent into comminutor and carries out pelletize, then got containing by sifted
State the granule that particle diameter is 4～6mm of highly effective water-keeping bulk blended fertilizer, then described granule is sent into microwave and do
In dry machine, under conditions of temperature 105～130 DEG C, it is dried 15～25min, obtains described highly effective water-keeping and mix
Complex fertilizer material.
Highly effective water-keeping bulk blended fertilizer obtained above is carried out Development of Peanut test, on cost puts into phase
Same principle selects the Bulk Blending Fertilizer of the regular manufacturer production in market as control treatment.Test site is Qingdao agricultural
University proving ground, arranges 2 process, is respectively comparison (common Bulk Blending Fertilizer of equal value): 48.6kg/667m2,
Process (highly effective water-keeping Bulk Blending Fertilizer) 13.7kg/667m2, plot area 36m2, it is repeated 3 times, all fertilizer
All the method for ditch spread is used disposably to apply as base fertilizer.Respectively at JIUYUE in 2015 5 days, JIUYUE 16 days,
JIUYUE carries out index of correlation mensuration on 27th.Soil water content earth boring auger takes 0-40cm soil sample and uses oven drying method
Measure；Chlorophyll content uses SPAD-502 chlorophyll meter to measure.
The soil moisture water content (%) of Semen arachidis hypogaeae under table 5 different disposal
As shown in Table 5, cost put into identical in the case of, use highly effective water-keeping Bulk Blending Fertilizer to compare use
Common Bulk Blending Fertilizer can keep higher soil water content, beneficially peanut growth.
The chlorophyll content in leaf blades of Semen Maydis under table 6 different disposal
| JIUYUE 5 days | JIUYUE 16 days | JIUYUE 27 days | |
| Comparison | 30.1 | 29.8 | 25.1 |
| Process | 36.6 | 33.9 | 31.7 |
As shown in Table 6, cost put into identical in the case of, use highly effective water-keeping Bulk Blending Fertilizer to compare use
Common Bulk Blending Fertilizer can keep higher chlorophyll content in leaf blades, beneficially peanut growth.
In terms of final yield result, the corn yield using highly effective water-keeping Bulk Blending Fertilizer to process is
326.02kg/667m2, the comparison yield using common Bulk Blending Fertilizer is 291.51kg/667m2, therefore use height
Effect water conservation Bulk Blending Fertilizer can obtain higher yield.
The above is not limitation of the present invention, it should be pointed out that: for the ordinary skill of the art
For personnel, on the premise of without departing from essential scope of the present invention, it is also possible to make some changes, remodeling,
Adding or replace, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (5)
1. a highly effective water-keeping bulk blended fertilizer, it is characterised in that feed components is as follows according to percentage by weight composition:
Carbamide 15～20%, Diammonium phosphate (DAP) 8～10%, potassium sulfate 12～18%, Borax 0.1～0.2%, zinc sulfate
0.05～0.1%, polyacrylamide 10～15%, clay 37～55%.
A kind of highly effective water-keeping bulk blended fertilizer, it is characterised in that also comprise trace element,
I.e. one in trace element-selenium, trace elements iron, microelements of calcium, trace element molybdenum, trace iodine
Or it is multiple.
A kind of highly effective water-keeping bulk blended fertilizer, it is characterised in that described bulk blended fertilizer
Dose is 12-16kg/667m2。
The production method of a kind of highly effective water-keeping bulk blended fertilizer, it is characterised in that concrete
Comprise the steps:
(1) preparation fertilizer solution:
Carbamide, Diammonium phosphate (DAP), potassium sulfate, Borax, zinc sulfate are added to by weight ratio in neutralization still,
Then according to the weight ratio of above-mentioned substance and water is that 1:1.5～2 adds water, it is sufficiently stirred for dissolving, obtains one
Plant fertilizer solution；
(2) polyacrylamide is added:
Take polyacrylamide according to weight proportion, the fertilizer solution in step (1) add polyacrylamide,
Then according to the weight ratio of above-mentioned substance and water is that 1:6～9 adds water, it is sufficiently stirred for dissolving, obtains one
Fertilizer and polyacrylamide are blended aqueous solution；
(3) clay is added:
Take clay according to weight proportion, interpolation is blended in aqueous solution to step (2) fertilizer and polyacrylamide glutinous
Soil, then according to the weight ratio of above-mentioned substance and water is that 1:1～3 adds water, is sufficiently stirred for dissolving, obtains
A kind of multiple sludge material uniformly wraps up the mixture of polyacrylamide；
(4) granulating and drying:
The mixture obtained in step (3) is sent into comminutor and carries out pelletize, then got by sifted
Particle diameter is the granule of 4～6mm, then granule is sent in microwave dryer, is dried to obtain highly effective water-keeping and mixes
Complex fertilizer material.
The production method of a kind of highly effective water-keeping bulk blended fertilizer, it is characterised in that described
In step (4), microwave dryer is dried 15～25min under conditions of temperature 105～130 DEG C.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106471983A (en) * | 2016-10-11 | 2017-03-08 | 山东农业大学 | A kind of fertilizing method persistently supplementing nutrient to apple tree |
| CN111606759A (en) * | 2020-06-01 | 2020-09-01 | 湖北省林业科学研究院 | Camellia oleifera slow-control fertilizer and preparation method and application thereof |
| CN115259942A (en) * | 2022-07-29 | 2022-11-01 | 青岛农业大学 | Polymerized salt-tolerant water-retention fertilizer and preparation method thereof |
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| CN104761387A (en) * | 2015-04-13 | 2015-07-08 | 中国热带农业科学院橡胶研究所 | Water-retaining and slowly-release compound fertilizer and preparation method thereof |
| CN105272773A (en) * | 2015-11-11 | 2016-01-27 | 中国热带农业科学院橡胶研究所 | Urea formaldehyde slow-release fertilizer rods and preparation method thereof |
| CN105272640A (en) * | 2015-11-11 | 2016-01-27 | 中国热带农业科学院橡胶研究所 | Humic-acid slow-release fertilizer rods and preparation method thereof |
| CN105272774A (en) * | 2015-11-11 | 2016-01-27 | 中国热带农业科学院橡胶研究所 | Controlled release fertilizer rods and preparing method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104761387A (en) * | 2015-04-13 | 2015-07-08 | 中国热带农业科学院橡胶研究所 | Water-retaining and slowly-release compound fertilizer and preparation method thereof |
| CN105272773A (en) * | 2015-11-11 | 2016-01-27 | 中国热带农业科学院橡胶研究所 | Urea formaldehyde slow-release fertilizer rods and preparation method thereof |
| CN105272640A (en) * | 2015-11-11 | 2016-01-27 | 中国热带农业科学院橡胶研究所 | Humic-acid slow-release fertilizer rods and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106471983A (en) * | 2016-10-11 | 2017-03-08 | 山东农业大学 | A kind of fertilizing method persistently supplementing nutrient to apple tree |
| CN106471983B (en) * | 2016-10-11 | 2019-04-12 | 山东农业大学 | A kind of fertilizing method persistently supplementing nutrient to apple tree |
| CN111606759A (en) * | 2020-06-01 | 2020-09-01 | 湖北省林业科学研究院 | Camellia oleifera slow-control fertilizer and preparation method and application thereof |
| CN115259942A (en) * | 2022-07-29 | 2022-11-01 | 青岛农业大学 | Polymerized salt-tolerant water-retention fertilizer and preparation method thereof |
| WO2024021193A1 (en) * | 2022-07-29 | 2024-02-01 | 青岛农业大学 | Polymeric salt-tolerant water-retaining fertilizer and preparation method therefor |
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