CN110734339A - fertilizer slow-release material with soil improvement function and preparation method and application thereof - Google Patents
fertilizer slow-release material with soil improvement function and preparation method and application thereof Download PDFInfo
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- CN110734339A CN110734339A CN201911202340.1A CN201911202340A CN110734339A CN 110734339 A CN110734339 A CN 110734339A CN 201911202340 A CN201911202340 A CN 201911202340A CN 110734339 A CN110734339 A CN 110734339A
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- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
Abstract
The invention discloses fertilizer slow-release materials with a soil improvement function and a preparation method and application thereof, wherein the fertilizer slow-release materials with the soil improvement function comprise a natural silicate mineral material and a high-molecular modified layer coated on the surface of the natural silicate mineral material, and the components of the high-molecular modified layer comprise polyacrylamide and polyacrylate.
Description
Technical Field
The invention relates to the technical field of fertilizers, in particular to fertilizer slow-release materials with a soil improvement function and a preparation method and application thereof.
Background
However, the fertilizer nutrient release speed is too fast, crops are lost when the fertilizer is not absorbed soon, series chemical conversion can occur after the fertilizer is applied to soil, and a considerable nutrient loss exists in the process, so that the fertilizer utilization rate in China is low, the utilization rate of foreign nitrogen fertilizers is 50% -55%, the resource waste is serious, and meanwhile, the serious water pollution (eutrophication caused by over standard nitrogen, phosphorus and potassium in water) and air pollution are caused by the fertilizer loss, even nitrate in vegetables is seriously over standard, so that the slowing and controlling of the dissolution and release speed of the fertilizer nutrient become which is the most direct and effective way for improving the fertilizer utilization rate and reducing the environmental pollution caused by nutrient loss.
The slow/controlled release fertilizer can supply nutrients according to the fertilizer requirement rule of crops, the released nutrients can be quickly absorbed and utilized by the crops, the nutrient loss is greatly reduced, and the utilization rate of the fertilizer is obviously improved, so that the aims of saving cost and increasing income, saving resources and reducing environmental pollution can be achieved
The natural silicate minerals (such as zeolite, attapulgite, montmorillonite, sepiolite and the like) have selective adsorption and ion exchange properties due to unique structures, and can be applied to fertilizer additives to improve soil, however, the natural silicate minerals are huge in dosage as soil improvement additives in aspect, the dosage of each mu is higher than tonnage (500kg-3000 kg), the use cost is higher, in addition, aspect, internal pore channels of the natural silicate minerals are mostly filled and blocked by impurities, the mutual communication degree is poor, the adsorption and exchange capacities of fertilizer nutrients are weak, the silicate minerals have selective adsorption effects on ammonium ions with positive charges, but the nitrate ions with negative charges easy to run off do not have good adsorption and retention effects, and the factors enable the natural silicate minerals to have low additional value as fertilizers, and limit the application of the natural silicate minerals in the field of fertilizers.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides fertilizer slow-release materials with the function of improving soil, and a preparation method and application thereof, and the materials have the advantages of good effect of reducing leaching loss of fertilizer nitrate radicals, stable use effect, long-term effect, excellent water and fertilizer retention effect, and environmental protection.
The invention also provides synergistic fertilizer additives.
The technical scheme of the invention is as follows:
kinds of fertilizer slow-release materials with the function of improving soil, which is characterized by comprising a natural silicate mineral material and a macromolecule modified layer coated on the surface of the natural silicate mineral material;
the components of the high-molecular modified layer comprise polyacrylamide and polyacrylate.
Preferably, the mass ratio of the high molecular modified layer to the natural silicate mineral material is (0.3-0.5): 100, respectively; preferably, in the components of the polymer modified layer, the mass ratio of polyacrylamide to polyacrylate is (0.2-0.3): (0.1-0.2).
More preferably, the mass ratio of the polymer modified layer to the natural silicate mineral material is 0.35: 100, in the high molecular modified layer, the mass ratio of polyacrylamide to polyacrylate is 0.25: 0.1.
Preferably, the polyacrylamide is anionic polyacrylamide, and the polyacrylate is potassium polyacrylate or sodium polyacrylate.
Preferably, the anionic polyacrylamide has a hydrolysis degree of 80-95% and a molecular weight of 1200-2200 ten thousand; preferably, the molecular weight of the potassium polyacrylate is 800-1400 ten thousand, the hydrolysis degree is 20-35%, and the potassium ion content is 10-15%.
Preferably, the natural silicate mineral material comprises or more of montmorillonite, attapulgite, sepiolite and zeolite, wherein the mass ratio of montmorillonite, attapulgite, sepiolite and zeolite can be (3-8): 1-10): 1-5): 25-95, or the mass ratio of montmorillonite, attapulgite, sepiolite and zeolite can be (15-95): 15-45): 1-5: (1-5), or the mass ratio of montmorillonite, attapulgite, sepiolite and zeolite can be (1-5): 25-95): 1-5, or the mass ratio of montmorillonite, attapulgite, sepiolite and zeolite can be (1-5): 1-95): 1-5.
Preferably, the natural silicate mineral material is prepared from montmorillonite, zeolite, attapulgite and sepiolite according to a mass ratio of 5: 60: 30: 5, or the natural silicate mineral material consists of zeolite: the attapulgite accounts for 70 mass percent: 30 or the natural silicate mineral material is prepared from montmorillonite, attapulgite, sepiolite and zeolite according to the mass ratio of 30: 3: 60: 7.
preparation method of fertilizer slow-release material with soil improvement function, which is characterized in that polyacrylamide and polyacrylate are dissolved in water to obtain macromolecule modified layer solution, the macromolecule modified layer solution is evenly sprayed on the surface of natural silicate mineral material, and then the natural silicate mineral material is treated for 1-2h at the temperature of 120-130 ℃ to obtain the fertilizer slow-release material with soil improvement function.
Preferably, the natural silicate mineral material is a natural silicate mineral material which is subjected to crushing, drying and roasting treatment.
Preferably, the preparation method of the fertilizer slow-release material with the function of improving soil comprises the following steps:
s1, crushing the natural silicate mineral material to 100-200 meshes, drying to make the water content below 2%, and then roasting at 480-550 ℃ for 1.5-2h to obtain the crushed, dried and roasted natural silicate mineral material;
s2, dissolving 0.2-0.3 part by weight of anionic polyacrylamide and 0.1-0.2 part by weight of potassium polyacrylate in 10 parts by weight of water to obtain a polymer modified layer solution, uniformly spraying the polymer modified layer solution on 100 parts by weight of the surface of the natural silicate mineral material subjected to crushing, drying and roasting treatment, then treating at the temperature of 120-130 ℃ for 1-2h, drying, and crushing to 100-200 meshes to obtain the modified natural silicate mineral material.
fertilizer slow-release materials with the function of improving soil, which are prepared by the preparation method.
The fertilizer slow-release material with the function of improving soil is applied to fertilizers.
Preferably, the fertilizer slow-release material with the function of improving soil is added into the fertilizer in an amount of 1-5% of the mass of the fertilizer.
synergistic fertilizer additives comprise, by weight, 45-96 parts of fertilizer slow-release materials with the function of improving soil, 5-30 parts of crop nutrition conditioners and 2-10 parts of crop growth promoters.
Preferably, the synergistic fertilizer auxiliary agent comprises the following raw materials in parts by weight: 85-90 parts of fertilizer slow-release material with the function of improving soil, 5-15 parts of crop nutrition conditioner and 2-5 parts of crop growth promoter.
Preferably, the crop nutrition conditioner comprises or more of boric acid, zinc sulfate, magnesium sulfate, wollastonite, ammonium molybdate, EDTA-Ca, EDTA-Mg, EDTA-Zn, polyaspartic acid zinc, polyaspartic acid calcium and alditol calcium.
Preferably, the crop nutrition conditioner consists of magnesium sulfate hydrate, zinc sulfate, boric acid, wollastonite, zinc polyaspartate and calcium polyaspartate according to the mass ratio of 5: 3: 2: 10: 3: 5.
Preferably, the crop growth promoter comprises or more of polyglutamic acid, poly-aspartic acid , betaine, fulvic acid, potassium fulvate, algal polysaccharides, gamma-aminobutyric acid, mevalonate, pentaaminyl levulinic acid, brassinolide and strigolactone.
Preferably, the crop growth promoter is prepared from polyglutamic acid, betaine, algal polysaccharide, fulvic acid and brassinolide according to a mass ratio of 3: 10: 1: 24: 2.
The invention has the following beneficial effects:
the invention can use natural silicate mineral material with low cost and easily obtained raw material as raw material, organically modify the natural silicate mineral material by using polypropylene high polymer to obtain fertilizer slow release material with soil improvement function, and the broken bond hydrolysis of Si-O-Si bond and Al-O-Al bond on the surface of the modified and crushed natural silicate mineral generates active sites R-OH and OH with negative charge-The sites can be combined with polyacrylate through adsorption and electric neutralization, and are combined with anionic polyacrylamide through weak hydrogen bonds, so that a composite polymer modified layer is formed on the surface of the mineral, and the natural mineral is bridged and bonded through a polymer material. The surface modification layer and the natural mineral structure have higher affinity, adsorption and aggregation effects on soil and water, and can promote the generation of soil aggregates, so that the water and fertilizer retention capability of the soil is improved, and the nitrate leaching loss is reduced. The fertilizer slow-release material with the soil improvement function has the characteristics of the conventional modified silicate minerals, such as more pore diameters, large specific surface area and capability of adsorbing ammonia nitrogen NH4 +The invention determines the type (anionic polyacrylamide and polyacrylate compounding) and the optimal molecular weight of high polymer through a large number of experimental screening so as to obtain more excellent water and fertilizer retention effects, and the obtained fertilizer slow-release material not only acts on fertilizer nutrients, but also acts on soil, improves the water retention capacity of the soil, stores and transports water, fixes more water and releases less water, enhances the water retention capacity of rhizosphere soil and promotes the formation of soil aggregates.
, the prior art mainly focuses on the reaction and combination between the organic modified material and the single mineral, while the single mineral is relatively single in function and effect due to its own structural limitation, and different structural minerals are subjected to surface modification, adhesion and recombination according to proportion by using a specific polymer modifier, so as to obtain a multi-element organic-inorganic composite material with stronger functions.
Drawings
Fig. 1 is a technical route diagram proposed by the present invention.
FIG. 2 is a soil leaching experimental facility of the present invention.
FIG. 3 shows the effect of reducing nitrate loss in soil of examples 1 to 3 and comparative examples 1 to 3.
FIG. 4 shows the amount of soil moisture evaporated per day in example 1 and comparative example 1.
FIG. 5 shows the soil water stable aggregate quality and distribution for examples 1-3 and comparative example 1.
Detailed Description
As shown in fig. 1, fig. 1 is a technical route diagram of the present invention.
Referring to fig. 1, the invention provides a fertilizer slow-release material with a soil improvement function.
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
The fertilizer slow-release material with the function of improving soil is prepared by the following steps:
s1, mixing montmorillonite, zeolite, attapulgite and sepiolite in a mass ratio of 5: 60: 30: 5 mixing to obtain natural silicate mineral material, pulverizing to 100 mesh and drying to water content below 2%, and roasting at 480 deg.C for 1.5 hr to obtain pulverized, dried and roasted natural silicate mineral material;
s2, dissolving 0.25 weight part of anionic polyacrylamide and 0.1 weight part of potassium polyacrylate in 10 weight parts of water to obtain a high-molecular modified layer solution, uniformly spraying the high-molecular modified layer solution on 100 weight parts of the surface of the crushed, dried and roasted natural silicate mineral material, then treating at 125 ℃ for 1h, performing surface organic modification, drying, and crushing to 100 meshes to obtain the modified natural silicate mineral material.
Wherein the anionic polyacrylamide has a hydrolysis degree of 95 percent and a molecular weight of 1800 ten thousand, the potassium polyacrylate has a molecular weight of 1300 ten thousand, a hydrolysis degree of 27 percent and a potassium ion content of 11 percent.
Example 2
The fertilizer slow-release material with the function of improving soil is prepared by the following steps:
s1, mixing zeolite and attapulgite according to a mass ratio of 70: 30 to obtain a natural silicate mineral material, crushing the natural silicate mineral material to 200 meshes, drying the crushed natural silicate mineral material until the water content is below 2 percent, and then roasting the crushed natural silicate mineral material at 550 ℃ for 1.5 hours to obtain the crushed, dried and roasted natural silicate mineral material;
s2, dissolving 0.2 part by weight of anionic polyacrylamide and 0.15 part by weight of potassium polyacrylate in 10 parts by weight of water to obtain a high-molecular modified layer solution, uniformly spraying the high-molecular modified layer solution on 100 parts by weight of the surface of the crushed, dried and roasted natural silicate mineral material, then treating at 120 ℃ for 1.5h, drying, and crushing to 200 meshes to obtain the modified natural silicate mineral material.
Wherein, the anionic polyacrylamide has a hydrolysis degree of 95% and a molecular weight of 2200 ten thousand, and preferably, the potassium polyacrylate has a molecular weight of 1400 ten thousand, a hydrolysis degree of 35% and a potassium ion content of 15%.
Example 3
The fertilizer slow-release material with the function of improving soil is prepared by the following steps:
s1, mixing montmorillonite, attapulgite, sepiolite and zeolite according to a mass ratio of 30: 3: 60: 7 mixing to obtain natural silicate mineral material, pulverizing to 100 mesh and drying to water content below 2%, and roasting at 500 deg.C for 1.5 hr to obtain pulverized, dried and roasted natural silicate mineral material;
s2, dissolving 0.3 weight part of anionic polyacrylamide and 0.2 weight part of potassium polyacrylate in 10 weight parts of water to obtain a high-molecular modified layer solution, uniformly spraying the high-molecular modified layer solution on 100 weight parts of the surface of the crushed, dried and roasted natural silicate mineral material, then treating at 130 ℃ for 2 hours, drying, and crushing to 100 meshes to obtain the modified natural silicate mineral material.
Wherein the anionic polyacrylamide has a hydrolysis degree of 80 percent and a molecular weight of 1200 ten thousand, the potassium polyacrylate has a molecular weight of 800 ten thousand, a hydrolysis degree of 20 percent and a potassium ion content of 10 percent.
Comparative example 1
The material of comparative example 1 was prepared as follows:
s1, mixing montmorillonite, zeolite, attapulgite and sepiolite in a mass ratio of 5: 60: 30: 5, mechanically mixing uniformly to obtain a natural silicate mineral material, crushing to 100 meshes, drying until the water content is below 2%, and roasting at 480 ℃ for 1.5 hours to obtain the crushed, dried and roasted natural silicate mineral material;
s2, mechanically and uniformly mixing 0.25 part by weight of anionic polyacrylamide, 0.1 part by weight of potassium polyacrylate and 100 parts by weight of the crushed, dried and roasted natural silicate mineral material. Wherein the anionic polyacrylamide has a hydrolysis degree of 95 percent and a molecular weight of 1800 ten thousand, the potassium polyacrylate has a molecular weight of 1300 ten thousand, a hydrolysis degree of 27 percent and a potassium ion content of 11 percent.
Comparative example 2
The material of comparative example 2 was prepared as follows:
s1, mixing zeolite and attapulgite according to a mass ratio of 70: 30, grinding to 200 meshes, drying to water content below 2%, and roasting at 550 ℃ for 1.5h to obtain a natural silicate mineral material after grinding, drying and roasting;
s2, mechanically and uniformly mixing 0.2 part by weight of anionic polyacrylamide, 0.15 part by weight of potassium polyacrylate and 100 parts by weight of the crushed, dried and roasted natural silicate mineral material. Wherein, the anionic polyacrylamide has a hydrolysis degree of 95% and a molecular weight of 2200 ten thousand, and preferably, the potassium polyacrylate has a molecular weight of 1400 ten thousand, a hydrolysis degree of 35% and a potassium ion content of 15%.
Comparative example 3
The material of comparative example 3 was prepared as follows:
s1, mixing montmorillonite, attapulgite, sepiolite and zeolite according to a mass ratio of 30: 3: 60: 7, mechanically and uniformly mixing to obtain a natural silicate mineral material, crushing to 100 meshes, drying to ensure that the water content is below 2%, and roasting at 500 ℃ for 1.5 hours to obtain the crushed, dried and roasted natural silicate mineral material;
s2, mechanically and uniformly mixing 0.3 part by weight of anionic polyacrylamide, 0.2 part by weight of potassium polyacrylate and 100 parts by weight of the crushed, dried and roasted natural silicate mineral material. Wherein the anionic polyacrylamide has a hydrolysis degree of 80 percent and a molecular weight of 1200 ten thousand, the potassium polyacrylate has a molecular weight of 800 ten thousand, a hydrolysis degree of 20 percent and a potassium ion content of 10 percent.
Test example 1 Water and Fertilizer conservation and soil improvement Performance test
The materials obtained in examples 1 to 3 and comparative examples 1 to 3 were used as samples to be tested and respectively subjected to a rainfall simulation leaching test, a soil moisture evaporation test and a soil water-stable aggregate determination test.
The test method for simulating the rainfall leaching test comprises the following steps: mixing vermiculite, sandy soil and perlite according to the weight ratio of 7: 2.5: 0.5, sieving with a 20-mesh sieve, and drying to obtain test soil containing 200mg Nitrate (NO) per 1kg of test soil3-) Loading into a leaching column, loading the sample to be tested into the leaching column, adding 500mL of distilled water into the leaching column for leaching, collecting filtrate, measuring the volume of the filtrate after leaching is finished, and measuring NO in the filtrate3-And (4) content. Wherein the addition amount of the sample to be tested is 2 percent of the weight of the soil to be tested.
The simulated rainfall leaching test results are shown in table 1 and fig. 3:
TABLE 1 simulated rainfall leaching test results
As can be seen from Table 1 and FIG. 3, examples 1 to 3 are effective in reducing nitrate leaching from soil as compared with comparative examples 1 to 3.
The test method of the soil moisture evaporation test comprises the following steps: mixing vermiculite, sandy soil and perlite according to the weight ratio of 7: 2.5: 0.5, sieving with a 20-mesh sieve, and drying to obtain the soil to be tested. 2g of a sample to be tested was dissolved in 30ml of water, sufficiently mixed in 100g of soil to be tested, and then uniformly dispersed in a petri dish having a diameter of 10 cm. The culture dish is placed in an incubator with a constant temperature of 25 ℃, taken out every 1d and weighed, and the daily water evaporation amount is calculated.
The results of the soil moisture evaporation test are shown in table 2 and fig. 4.
Table 220 d Total soil moisture Evaporation
As can be seen from fig. 4, the amount of water evaporated in comparative example 1 was already reduced compared to the control (pure soil) because of the content of the composite mineral material, but based on this, example 1 was able to significantly reduce the amount of water evaporated in the soil, and particularly in the first ten days, the amount of water evaporated was reduced by more than 51% compared to the control.
As can be seen from Table 2, the cumulative soil moisture evaporation amount of 20d in examples 1 to 3 is significantly reduced compared with that in comparative examples 1 to 3, which shows that the material of the present invention can greatly reduce the moisture evaporation amount and effectively improve the water retention effect.
The test method of the soil water-stable aggregate determination test comprises the steps of uniformly mixing a sample to be tested with soil, and determining the quality of the water-stable soil aggregate with a particle size of by using a NY/T1121.19-2008 medium wet sieve method, wherein the addition amount of the sample to be tested is 2% of the weight of the soil.
The test results of the soil water-stable aggregate determination test are shown in table 3 and fig. 5.
TABLE 30.5-1 mm soil Water-stable aggregate content
FIG. 5 shows the quality and distribution of soil water-stable aggregates of examples 1-3 and comparative example 1. compared with comparative example 1, examples 1-3 can effectively increase the amount of soil aggregates, more precisely, the fertilizer and water retention effect achieved by the present invention, especially the amount of soil aggregates with 0.25-0.5mm and 0.5-1mm particle size, thereby achieving the effects of fertilizer and water retention and soil improvement. (the more soil aggregates, the better the soil moisture and fertility preservation effect).
Table 3 shows the content of the soil water-stable aggregates of 0.5 to 1mm in examples 1 to 3 and comparative examples 1 to 3, and it can be seen from Table 3 that the soil water-stable aggregates of 0.5 to 1mm in particle size are significantly higher in the examples 1 to 3 than in the comparative examples 1 to 3, so that the soil water-stable aggregates have better fertilizer and water retention and soil improvement effects.
Test example 2 fertilizer efficiency test
In order to further verify the application effect of the material in the fertilizer in step , a corn plot experiment is performed.
Test protocol: the cell test adopts random block arrangement and totally sets four treatments. Each treatment was repeated 3 times with a cell area of 25m2Ridge is arranged between the cells, and different repetition intervals are separated by a walkway. The test is carried out according to the actual yield of the cells, and the yield per mu is converted. The experimental design was as follows:
treatment 1: blank control, no fertilization;
The results of the fertilizer efficiency test are shown in table 4:
TABLE 4 results of fertilizer efficiency test
| Examples | Ear length (cm) | Plant height (cm) | Grain number per ear | Bai Lili (g) | Mu yield (kg) |
| |
14.1 | 198 | 335 | 19.2 | 332.19 |
| |
16.7 | 240 | 519 | 27.7 | 559.20 |
| |
15.3 | 229 | 403 | 25.1 | 462.63 |
| |
15.6 | 235 | 462 | 26.4 | 478.39 |
As can be seen from table 4:
compared with the treatment 3, the treatment 2 can improve the corn yield by 96.57 kg/mu with the yield increasing rate of 20.8% under the condition of the same fertilizing amount, can fertilize without topdressing for times, reduces the labor intensity and reduces the workload, and compared with the treatment 4 (a commercially available similar effect product: humic acid compound fertilizer), the treatment 2 can improve the corn yield by 80.81 kg/mu without reducing the yield under the condition of reducing the conventional fertilizing amount by 20%, and the yield increasing rate is 16.9%.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1, kinds of fertilizer slow release materials with soil improvement function, which is characterized in that the fertilizer slow release materials comprise natural silicate mineral materials and macromolecule modified layers coated on the surfaces of the natural silicate mineral materials;
the components of the high-molecular modified layer comprise polyacrylamide and polyacrylate.
2. The fertilizer slow-release material with the function of improving soil according to claim 1, wherein the mass ratio of the high-molecular modified layer to the natural silicate mineral material is (0.3-0.5): 100, respectively; preferably, in the components of the polymer modified layer, the mass ratio of polyacrylamide to polyacrylate is (0.2-0.3): (0.1-0.2).
3. The fertilizer slow-release material with the function of improving soil as claimed in claim 1 or 2, wherein the polyacrylamide is anionic polyacrylamide, the polyacrylate is potassium polyacrylate or sodium polyacrylate, preferably, the anionic polyacrylamide has a hydrolysis degree of 80-95% and a molecular weight of 1200-2200 ten thousand, preferably, the potassium polyacrylate has a molecular weight of 800-1400 thousand, a hydrolysis degree of 20-35% and a potassium ion content of 10-15%, and preferably, the natural silicate mineral material is or more of montmorillonite, attapulgite, sepiolite and zeolite.
4, A method for preparing fertilizer slow-release material with soil improvement function according to any of claims 1-3, which comprises the steps of dissolving polyacrylamide and polyacrylate in water to obtain a solution of a polymer modified layer, uniformly spraying the solution of the polymer modified layer on the surface of a natural silicate mineral material, and then treating at 120-130 ℃ for 1-2h to obtain the fertilizer slow-release material with soil improvement function.
5. The method for preparing a fertilizer slow-release material with a soil improvement function according to claim 4, wherein the natural silicate mineral material is a crushed, dried and roasted natural silicate mineral material.
6. The method for preparing a fertilizer slow-release material with a function of improving soil according to claim 5, which is characterized by comprising the following steps:
s1, crushing the natural silicate mineral material to 100-200 meshes, drying to make the water content below 2%, and then roasting at 480-550 ℃ for 1.5-2h to obtain the crushed, dried and roasted natural silicate mineral material;
s2, dissolving 0.2-0.3 part by weight of anionic polyacrylamide and 0.1-0.2 part by weight of potassium polyacrylate in 10 parts by weight of water to obtain a polymer modified layer solution, uniformly spraying the polymer modified layer solution on 100 parts by weight of the surface of the natural silicate mineral material subjected to crushing, drying and roasting treatment, then treating at the temperature of 120-130 ℃ for 1-2h, drying, and crushing to 100-200 meshes to obtain the modified natural silicate mineral material.
A slow release fertilizer material with soil improvement function of , which is prepared by the preparation method of any one of of claims 4-6.
Use of fertilizer slow release materials with soil improvement function as claimed in any of claims 1-3 or 7 in fertilizers.
9. The application of the fertilizer slow-release material with the soil improvement function in the fertilizer as claimed in claim 8, wherein the fertilizer slow-release material with the soil improvement function is added in the fertilizer in an amount of 1-5% of the mass of the fertilizer.
10, synergistic fertilizer auxiliary agents, which is characterized by comprising 45-96 parts of fertilizer slow release material with soil improvement function as described in any of claims 1-3 or 7, 2-30 parts of crop nutrition conditioner and 2-10 parts of crop growth promoter by weight, preferably comprising 85-90 parts of fertilizer slow release material with soil improvement function as described in any of claims 1-3 or 7, 5-15 parts of crop nutrition conditioner and 2-5 parts of crop growth promoter by weight.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111303899A (en) * | 2020-03-17 | 2020-06-19 | 安徽卓砺环保科技有限公司 | Environment-responsive soil conditioner and preparation method thereof |
| CN112110770A (en) * | 2020-08-12 | 2020-12-22 | 安徽卓砺环保科技有限公司 | Ion-stabilized synergistic loss-control agent and preparation method thereof |
| CN114736071A (en) * | 2022-05-05 | 2022-07-12 | 白银丰宝农化科技有限公司 | Preparation method and application of attapulgite clay modified compound fertilizer |
| CN115385733A (en) * | 2022-05-31 | 2022-11-25 | 浙江恒逸石化研究院有限公司 | Composite water-retaining agent for compost mixture and application thereof |
-
2019
- 2019-11-29 CN CN201911202340.1A patent/CN110734339A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111303899A (en) * | 2020-03-17 | 2020-06-19 | 安徽卓砺环保科技有限公司 | Environment-responsive soil conditioner and preparation method thereof |
| CN112110770A (en) * | 2020-08-12 | 2020-12-22 | 安徽卓砺环保科技有限公司 | Ion-stabilized synergistic loss-control agent and preparation method thereof |
| CN114736071A (en) * | 2022-05-05 | 2022-07-12 | 白银丰宝农化科技有限公司 | Preparation method and application of attapulgite clay modified compound fertilizer |
| CN115385733A (en) * | 2022-05-31 | 2022-11-25 | 浙江恒逸石化研究院有限公司 | Composite water-retaining agent for compost mixture and application thereof |
| CN115385733B (en) * | 2022-05-31 | 2024-04-05 | 浙江恒逸石化研究院有限公司 | Application of composite water-retaining agent in compost mixture |
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Application publication date: 20200131 |