CN105348004A - Humic-acid-containing modified-starch-coated slow-release fertilizer and preparation method thereof - Google Patents
Humic-acid-containing modified-starch-coated slow-release fertilizer and preparation method thereof Download PDFInfo
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Abstract
A provided humic-acid-containing modified-starch-coated slow-release fertilizer comprises the following compositions in parts by weight: 75-85 parts of urea, 2-5 parts of potassium superphosphate, 1-3 parts of sodium hydroxide, 3-9 parts of N,N'-methylenebisacrylamide, 1-5 parts of ammonium sulfate, 2-6 parts of ammonium chloride, 1-4 parts of potassium dihydrogen phosphate, 2-6 parts of deionized water, 2-8 parts of microcrystalline wax, 1-5 parts of collophane powder, 2-8 parts of sodium alginate, 6-12 parts of modified starch, 3-9 parts of cellulose derivative, 1-3 parts of humic acid, 2-6 parts of acrylic acid, 3-8 parts of copper potassium pyrophosphate, and 2-6 parts of ammonium polyacrylate. According to the technical scheme, the nutrient release rate of the coated slow-release fertilizer is alleviated, the water retention capability of soil is improved, also the coated slow-release fertilizer is degradable, low in cost, and suitable for large-scale popularization and usage.
Description
Technical field
The present invention relates to the technical field of fertilizer and manufacture thereof, particularly relate to a kind of treated starch film-coated and slow release fertilizer containing humic acids.
Background technology
At present, along with the mankind improve constantly the concern of environment, health and natural resources sustainable use etc., while guarantee grain yield, reduce fertilizer loss to greatest extent, improve utilization rate of fertilizer, being the vital task of current agricultural fertilizer scientific and technical innovation, is also the important guarantee realizing agricultural sustainable development.
Slow-release fertilizer meets the requirement of environment protection and agricultural sustainable development, is the developing direction of world agriculture fertilizer, and wherein coating delays the main flow that type slow-release fertilizer is release controlled fertilizer from now on.But the coating of existing coating type sustained-release chemical fertilizer product is the material useless to crop, mostly can not environment degradable, contaminate environment in soil can be remained, such as epoxy resin, urethane, polyethylene, polypropylene etc.Adopt degradable and there is the coated fertilizer of certain fertilizer efficiency, both environmental sounds, again can as fertilizer, therefore degradable the envelope type slow release fertilizer with certain fertilizer efficiency are the expectations in film-coated and slow release fertilizer field.
Summary of the invention
For solving the technical problem existed in background technology, the present invention proposes a kind of treated starch film-coated and slow release fertilizer containing humic acids, use the film-coated and slow release fertilizer that this preparation method obtains, the rate of release slowing down coated slow-release fertilizer nutrient and the effect improving water retention in soil can be played, this film-coated and slow release fertilizer degradable simultaneously, cost is low, is applicable to large-scale popularization and use.
A kind of treated starch film-coated and slow release fertilizer containing humic acids that the present invention proposes, its raw material comprises following component by weight: urea 75-85 part, potassium superphosphate 2-5 part, sodium hydroxide 1-3 part, N, N '-methylene bisacrylamide acid acid amides 3-9 part, ammonium sulfate 1-5 part, ammonium chloride 2-6 part, potassium primary phosphate 1-4 part, deionized water 2-6 part, microcrystalline wax 2-8 part, collophanite powder 1-5 part, sodium alginate 2-8 part, treated starch 6-12 part, derivatived cellulose 3-9 part, humic acids 1-3 part, vinylformic acid 2-6 part, cupric pyrophosphate potassium 3-8 part, ammonium polyacrylate 2-6 part.
Preferably, its raw material comprises following component by weight: urea 76-84 part, potassium superphosphate 3-4 part, sodium hydroxide 1.5-2.5 part, N, N '-methylene bisacrylamide acid acid amides 4-8 part, ammonium sulfate 2-4 part, ammonium chloride 3-5 part, potassium primary phosphate 2-3 part, deionized water 3-5 part, microcrystalline wax 3-7 part, collophanite powder 2-4 part, sodium alginate 3-7 part, treated starch 7-11 part, derivatived cellulose 4-8 part, humic acids 1.5-2.5 part, vinylformic acid 3-5 part, cupric pyrophosphate potassium 4-7 part, ammonium polyacrylate 3-5 part.
Preferably, its raw material comprises following component by weight: 80 parts, urea, potassium superphosphate 3.5 parts, 2.0 parts, sodium hydroxide, N, N '-methylene bisacrylamide acid acid amides 6 parts, 3 parts, ammonium sulfate, ammonium chloride 4 parts, potassium primary phosphate 2.5 parts, deionized water 4 parts, microcrystalline wax 5 parts, 3 parts, collophanite powder, sodium alginate 5 parts, treated starch 9 parts, derivatived cellulose 6 parts, humic acids 2.0 parts, 4 parts, vinylformic acid, 5.5 parts, cupric pyrophosphate potassium, ammonium polyacrylate 4 parts.
The present invention also proposes a kind of preparation method of the treated starch film-coated and slow release fertilizer containing humic acids, comprises the steps:
The preparation of S1, slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, adds deionized water and obtains pasted starch in the stirred in water bath of 65-85 DEG C in treated starch; Under the water bath condition of 30-50 DEG C, in acrylic acid solution, dripping sodium hydroxide solution to PH is 5.1-5.9, and add collophanite powder and mix with pasted starch, after continuation interpolation deionized water and stirring is even, add potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides, derivatived cellulose, humic acids, ammonium polyacrylate to 65-85 DEG C, obtain the solution of coated fertilizer by the warming while stirring of 5 DEG C/min program after constant temperature polyreaction 0.5-1.5h;
The preparation of S2, slow-release fertilizer kernel: take urea by the weight part of above-mentioned formula, potassium primary phosphate, cupric pyrophosphate potassium, ammonium sulfate, ammonium chloride is embedded in sodium alginate, be heated to 65-85 DEG C, add after microcrystalline wax mixes and obtain slow-release fertilizer kernel;
S3, by the slow-release fertilizer kernel obtained in S2 under twirl with spray gun to even slow the solution spraying the coated fertilizer in S1 of urea surface, slow-release fertilizer core surface is all wrapped up by the solution of coated fertilizer, then will superscribe slow-release fertilizer kernel dry 2-4h at 60-90 DEG C of coated fertilizer solution, be cooled to room temperature preservation stand-by.
Preferably, in S1, the preparation of slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, adds deionized water and obtains pasted starch in the stirred in water bath of 68-82 DEG C; Under the water bath condition of 32-48 DEG C, in acrylic acid solution, dripping sodium hydroxide solution to PH is 5.2-5.8, and add collophanite powder and mix with pasted starch, after continuation interpolation deionized water and stirring is even, add potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides, derivatived cellulose, humic acids and ammonium polyacrylate to 68-82 DEG C, obtain the solution of coated fertilizer by the warming while stirring of 5 DEG C/min program after constant temperature polyreaction 0.8-1.2h.
Preferably, in S1, the preparation of slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, adds deionized water and obtains pasted starch in the stirred in water bath of 75 DEG C; Under the water bath condition of 40 DEG C, in acrylic acid solution, dripping sodium hydroxide solution to PH is 5.7, and add collophanite powder and mix with pasted starch, after continuation interpolation deionized water and stirring is even, add potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides, derivatived cellulose, humic acids and ammonium polyacrylate, by the warming while stirring to 75 DEG C of 5 DEG C/min program, obtain the solution of coated fertilizer after constant temperature polyreaction 1.0h.
Preferably, in S2, the preparation of slow-release fertilizer kernel: take urea by the weight part of above-mentioned formula, potassium primary phosphate, cupric pyrophosphate potassium, ammonium sulfate, ammonium chloride is embedded in sodium alginate, be heated to 68-82 DEG C, add after microcrystalline wax mixes and obtain slow-release fertilizer kernel.
Preferably, in S2, the preparation of slow-release fertilizer kernel: take urea by the weight part of above-mentioned formula, potassium primary phosphate, cupric pyrophosphate potassium, ammonium sulfate, ammonium chloride is embedded in sodium alginate, be heated to 75 DEG C, add after microcrystalline wax mixes and obtain slow-release fertilizer kernel.
Preferably, in S3, by under the slow-release fertilizer kernel twirl obtained in S2 with spray gun to even slow the solution spraying the coated fertilizer in S1 of urea surface, slow-release fertilizer core surface is all wrapped up by the solution of coated fertilizer, then will superscribe slow-release fertilizer kernel dry 2.5-3.5h at 65-85 DEG C of coated fertilizer solution, be cooled to room temperature preservation stand-by.
Preferably, in S3, by under the slow-release fertilizer kernel twirl obtained in S2 with spray gun to even slow the solution spraying the coated fertilizer in S1 of urea surface, slow-release fertilizer core surface is all wrapped up by the solution of coated fertilizer, then will superscribe slow-release fertilizer kernel dry 3.0h at 75 DEG C of coated fertilizer solution, be cooled to room temperature preservation stand-by.
Treated starch is on the basis of the natural characteristics had at native starch, for improve starch performance, expand its range of application, utilize physics, chemistry or enzymatic treatment, starch molecule is introduced new functional group or changes starch molecule size and starch granular property; Treated starch is wide material sources simultaneously, cheap, can the natural high moleculer eompound of natural degradation, by regulating obtained pasted starch with deionized water, because pasted starch exists a large amount of hydrophilic hydroxyl groups, effectively can to loosen the dense structure of polyacrylate, to make water molecules easily enter into material internal cavity.
Sodium alginate is a kind of polysaccharide carbohydrate extracted from the sea-tangle or sargassun of phaeophyta, by 1, a kind of simple linear polymer of the poly-beta-D-mannuronic acid of 4-and α-L-guluronic acid composition, it is the one in alginic acid derivative, so sometimes also claim sodium alginate or seaweed gel and seaweed gel, its molecular formula is (C
6h
7o
6na) n, relative molecular weight is between 3200-200000, the outward appearance of sodium alginate is white or pale yellow powder, almost odorless, there is dilution, water-soluble and form thick gel, be insoluble to ethanol and other organic solvents, stability is better between 6-11 with pH value, and not resistance to strong acid, highly basic and some heavy metal ion.
In the present invention, by urea, potassium primary phosphate, cupric pyrophosphate potassium, ammonium sulfate, ammonium chloride are embedded in sodium alginate, obtain slow-release fertilizer kernel after mixing with microcrystalline wax after heating, the slow-release fertilizer kernel obtained can provide the growth elements such as necessary C, H, O, N, P, K for the growth of plant, obtain pasted starch with treated starch through deionized water simultaneously, in acrylic acid solution, drip sodium hydroxide solution and add collophanite powder and mix with pasted starch, after continuation interpolation deionized water and stirring is even, add potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides, derivatived cellulose, humic acids, ammonium polyacrylate polymerization obtains coated fertilizer, the treated starch that the coated fertilizer of this slow-release fertilizer is easy to get with raw material is for major ingredient, by humic acids and ammonium polyacrylate at potassium superphosphate and N, be cross-linked under the effect of N '-methylene bisacrylamide acid acid amides and obtain cross-linking type humic acids-polyacrylic acid material, then in cross-linking type humic acids-polyacrylic acid material, add derivatived cellulose and obtain slow-release fertilizer coating materials, effectively improve the Water-saving effect of slow-release fertilizer, outer surface slow-release fertilizer coating materials being wrapped in slow-release fertilizer kernel makes the treated starch film-coated and slow release fertilizer containing humic acids, serve the speed slowing down fertilizer nutrient release and the effect improving water retention in soil, the treated starch wherein added and humic acids material are easy to get, cost is low, and the hydrophilic hydroxyl groups on treated starch surface, effectively can improve the Water-saving effect of film-coated and slow release fertilizer, the humic acids simultaneously added can not only improve the water-retaining capacity of film-coated and slow release fertilizer, reduce production cost, improve degradation property, also play an important role in the use of slow-release fertilizer as fertilizer, derivatived cellulose, as crystal type natural macromolecular material, has good hydrophobicity and moulding property, and the coated fertilizer as film-coated and slow release fertilizer has good slow release effect.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail; should understand; embodiment is only for illustration of the present invention, instead of for limiting the present invention, any amendment, equivalent replacement etc. made on basis of the present invention is all in protection scope of the present invention.
A kind of treated starch film-coated and slow release fertilizer containing humic acids that the present invention proposes, its raw material comprises following component by weight: urea can be 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85 parts, potassium superphosphate can be 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0 part, sodium hydroxide can be 1.0, 1.5, 2.0, 2.5, 3.0 part, N, N '-methylene bisacrylamide acid acid amides 3, 4, 5, 6, 7, 8, 9 parts, ammonium sulfate 1, 2, 3, 4, 5 parts, ammonium chloride can be 2, 3, 4, 5, 6 parts, potassium primary phosphate can be 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0 part, deionized water can be 2, 3, 4, 5, 6 parts, microcrystalline wax can be 2, 3, 4, 5, 6, 7, 8 parts, collophanite powder can be 1, 2, 3, 4, 5 parts, sodium alginate can be 2, 3, 4, 5, 6, 7, 8 parts, treated starch 6, 7, 8, 9, 10, 11, 12 parts, derivatived cellulose can be 3, 4, 5, 6, 7, 8, 9 parts, humic acids can be 1.0, 1.5, 2.0, 2.5, 3.0 part, vinylformic acid can be 2, 3, 4, 5, 6 parts, cupric pyrophosphate potassium can be 3, 4, 5, 6, 7, 8 parts, ammonium polyacrylate can be 2, 3, 4, 5, 6 parts, water-holding agent can be 2, 3, 4, 5, 6, 7, 8 parts.
Embodiment 1
A kind of treated starch film-coated and slow release fertilizer containing humic acids that the present invention proposes, its raw material comprises following component by weight, 80 parts, urea, potassium superphosphate 3.5 parts, 2.0 parts, sodium hydroxide, N, N '-methylene bisacrylamide acid acid amides 6 parts, 3 parts, ammonium sulfate, ammonium chloride 4 parts, potassium primary phosphate 2.5 parts, deionized water 4 parts, microcrystalline wax 5 parts, 3 parts, collophanite powder, sodium alginate 5 parts, treated starch 9 parts, derivatived cellulose 6 parts, humic acids 2.0 parts, 4 parts, vinylformic acid, 5.5 parts, cupric pyrophosphate potassium, ammonium polyacrylate 4 parts, water-holding agent 5 parts.
The preparation method of a kind of treated starch film-coated and slow release fertilizer containing humic acids that the present invention proposes, comprises the steps:
The preparation of S1, slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, adds deionized water and obtains pasted starch in the stirred in water bath of 75 DEG C in treated starch; Under the water bath condition of 40 DEG C, in acrylic acid solution, dripping sodium hydroxide solution to PH is 5.7, and add collophanite powder and mix with pasted starch, after continuation interpolation deionized water and stirring is even, add potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides, derivatived cellulose, humic acids, ammonium polyacrylate and water-holding agent, by the warming while stirring to 75 DEG C of 5 DEG C/min program, obtain the solution of coated fertilizer after constant temperature polyreaction 1.0h;
The preparation of S2, slow-release fertilizer kernel: take urea by the weight part of above-mentioned formula, potassium primary phosphate, cupric pyrophosphate potassium, ammonium sulfate, ammonium chloride is embedded in sodium alginate, be heated to 75 DEG C, add after microcrystalline wax mixes and obtain slow-release fertilizer kernel;
S3, by under the slow-release fertilizer kernel twirl obtained in S2 with spray gun to even slow the solution spraying the coated fertilizer in S1 of urea surface, slow-release fertilizer core surface is all wrapped up by the solution of coated fertilizer, then will superscribe slow-release fertilizer kernel dry 3h at 75 DEG C of coated fertilizer solution, be cooled to room temperature preservation stand-by.
Embodiment 2
A kind of treated starch film-coated and slow release fertilizer containing humic acids that the present invention proposes, its raw material comprises following component by weight: 75 parts, urea, potassium superphosphate 5 parts, 1 part, sodium hydroxide, N, N '-methylene bisacrylamide acid acid amides 9 parts, 1 part, ammonium sulfate, ammonium chloride 6 parts, potassium primary phosphate 1 part, deionized water 6 parts, microcrystalline wax 2 parts, 5 parts, collophanite powder, sodium alginate 2 parts, treated starch 12 parts, derivatived cellulose 3 parts, humic acids 3 parts, 2 parts, vinylformic acid, 8 parts, cupric pyrophosphate potassium, ammonium polyacrylate 2 parts, water-holding agent 8 parts.
A kind of treated starch film-coated and slow release fertilizer containing humic acids that the present invention proposes, comprises the steps:
The preparation of S1, slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, adds deionized water and obtains pasted starch in the stirred in water bath of 65 DEG C in treated starch; Under the water bath condition of 50 DEG C, in acrylic acid solution, dripping sodium hydroxide solution to PH is 5.1, and add collophanite powder and mix with pasted starch, after continuation interpolation deionized water and stirring is even, add potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides, derivatived cellulose, humic acids, ammonium polyacrylate and water-holding agent, by the warming while stirring to 85 DEG C of 5 DEG C/min program, obtain the solution of coated fertilizer after constant temperature polyreaction 0.5h;
The preparation of S2, slow-release fertilizer kernel: take urea by the weight part of above-mentioned formula, potassium primary phosphate, cupric pyrophosphate potassium, ammonium sulfate, ammonium chloride is embedded in sodium alginate, be heated to 65 DEG C, add after microcrystalline wax mixes and obtain slow-release fertilizer kernel;
S3, by under the slow-release fertilizer kernel twirl obtained in S2 with spray gun to even slow the solution spraying the coated fertilizer in S1 of urea surface, slow-release fertilizer core surface is all wrapped up by the solution of coated fertilizer, then will superscribe slow-release fertilizer kernel dry 4h at 60 DEG C of coated fertilizer solution, be cooled to room temperature preservation stand-by.
Embodiment 3
A kind of treated starch film-coated and slow release fertilizer containing humic acids that the present invention proposes, its raw material comprises following component by weight: 85 parts, urea, potassium superphosphate 2 parts, 3 parts, sodium hydroxide, N, N '-methylene bisacrylamide acid acid amides 3 parts, 5 parts, ammonium sulfate, ammonium chloride 2 parts, potassium primary phosphate 4 parts, deionized water 2 parts, microcrystalline wax 8 parts, 1 part, collophanite powder, sodium alginate 8 parts, treated starch 6 parts, derivatived cellulose 9 parts, humic acids 1 part, 6 parts, vinylformic acid, 3 parts, cupric pyrophosphate potassium, ammonium polyacrylate 6 parts, water-holding agent 2 parts.
The preparation method of a kind of treated starch film-coated and slow release fertilizer containing humic acids that the present invention proposes, comprises the steps:
The preparation of S1, slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, adds deionized water and obtains pasted starch in the stirred in water bath of 85 DEG C in treated starch; Under the water bath condition of 30 DEG C, in acrylic acid solution, dripping sodium hydroxide solution to PH is 5.9, and add collophanite powder and mix with pasted starch, after continuation interpolation deionized water and stirring is even, add potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides, derivatived cellulose, humic acids, ammonium polyacrylate and water-holding agent, by the warming while stirring to 65 DEG C of 5 DEG C/min program, obtain the solution of coated fertilizer after constant temperature polyreaction 1.5h;
The preparation of S2, slow-release fertilizer kernel: take urea by the weight part of above-mentioned formula, potassium primary phosphate, cupric pyrophosphate potassium, ammonium sulfate, ammonium chloride is embedded in sodium alginate, be heated to 85 DEG C, add after microcrystalline wax mixes and obtain slow-release fertilizer kernel;
S3, by under the slow-release fertilizer kernel twirl obtained in S2 with spray gun to even slow the solution spraying the coated fertilizer in S1 of urea surface, slow-release fertilizer core surface is all wrapped up by the solution of coated fertilizer, then will superscribe slow-release fertilizer kernel dry 2h at 90 DEG C of coated fertilizer solution, be cooled to room temperature preservation stand-by.
Embodiment 4
A kind of treated starch film-coated and slow release fertilizer containing humic acids that the present invention proposes, its raw material comprises following component by weight: 76 parts, urea, potassium superphosphate 4 parts, 1.5 parts, sodium hydroxide, N, N '-methylene bisacrylamide acid acid amides 8 parts, 2 parts, ammonium sulfate, ammonium chloride 5 parts, potassium primary phosphate 2 parts, deionized water 5 parts, microcrystalline wax 3 parts, 4 parts, collophanite powder, sodium alginate 3 parts, treated starch 11 parts, derivatived cellulose 4 parts, humic acids 2.5 parts, 3 parts, vinylformic acid, 7 parts, cupric pyrophosphate potassium, ammonium polyacrylate 3 parts, water-holding agent 7 parts.
The preparation method of a kind of treated starch film-coated and slow release fertilizer containing humic acids that the present invention proposes, comprises the steps:
The preparation of S1, slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, adds deionized water and obtains pasted starch in the stirred in water bath of 68 DEG C in treated starch; Under the water bath condition of 48 DEG C, in acrylic acid solution, dripping sodium hydroxide solution to PH is 5.2, and add collophanite powder and mix with pasted starch, after continuation interpolation deionized water and stirring is even, add potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides, derivatived cellulose, humic acids, ammonium polyacrylate and water-holding agent, by the warming while stirring to 82 DEG C of 5 DEG C/min program, obtain the solution of coated fertilizer after constant temperature polyreaction 0.8h;
The preparation of S2, slow-release fertilizer kernel: take urea by the weight part of above-mentioned formula, potassium primary phosphate, cupric pyrophosphate potassium, ammonium sulfate, ammonium chloride is embedded in sodium alginate, be heated to 68 DEG C, add after microcrystalline wax mixes and obtain slow-release fertilizer kernel;
S3, by under the slow-release fertilizer kernel twirl obtained in S2 with spray gun to even slow the solution spraying the coated fertilizer in S1 of urea surface, slow-release fertilizer core surface is all wrapped up by the solution of coated fertilizer, then will superscribe slow-release fertilizer kernel dry 3.5h at 65 DEG C of coated fertilizer solution, be cooled to room temperature preservation stand-by.
Embodiment 5
A kind of treated starch film-coated and slow release fertilizer containing humic acids that the present invention proposes, its raw material comprises following component by weight: urea 76-84 part, potassium superphosphate 3-4 part, sodium hydroxide 1.5-2.5 part, N, N '-methylene bisacrylamide acid acid amides 4-8 part, ammonium sulfate 2-4 part, ammonium chloride 3-5 part, potassium primary phosphate 2-3 part, deionized water 3-5 part, microcrystalline wax 3-7 part, collophanite powder 2-4 part, sodium alginate 3-7 part, treated starch 7-11 part, derivatived cellulose 4-8 part, humic acids 1.5-2.5 part, vinylformic acid 3-5 part, cupric pyrophosphate potassium 4-7 part, ammonium polyacrylate 3-5 part, water-holding agent 3-7 part.
The preparation method of a kind of treated starch film-coated and slow release fertilizer containing humic acids that the present invention proposes, comprises the steps:
The preparation of S1, slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, adds deionized water and obtains pasted starch in the stirred in water bath of 82 DEG C in treated starch; Under the water bath condition of 32 DEG C, in acrylic acid solution, dripping sodium hydroxide solution to PH is 5.8, and add collophanite powder and mix with pasted starch, after continuation interpolation deionized water and stirring is even, add potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides, derivatived cellulose, humic acids, ammonium polyacrylate and water-holding agent, by the warming while stirring to 68 DEG C of 5 DEG C/min program, obtain the solution of coated fertilizer after constant temperature polyreaction 1.2h;
The preparation of S2, slow-release fertilizer kernel: take urea by the weight part of above-mentioned formula, potassium primary phosphate, cupric pyrophosphate potassium, ammonium sulfate, ammonium chloride is embedded in sodium alginate, be heated to 82 DEG C, add after microcrystalline wax mixes and obtain slow-release fertilizer kernel;
S3, by under the slow-release fertilizer kernel twirl obtained in S2 with spray gun to even slow the solution spraying the coated fertilizer in S1 of urea surface, slow-release fertilizer core surface is all wrapped up by the solution of coated fertilizer, then will superscribe slow-release fertilizer kernel dry 2.5h at 85 DEG C of coated fertilizer solution, be cooled to room temperature preservation stand-by.
A kind of treated starch film-coated and slow release fertilizer containing humic acids in embodiment 1-5 is applied in actual plantation, choose 6 pieces of farmlands of the same area to plant, 6 pieces of farmlands are divided into 1-6 farmland, wherein, No. 1 farmland planting coventional type film-coated and slow release fertilizer, film-coated and slow release fertilizer in No. 2 farmland planting embodiments 1, film-coated and slow release fertilizer in No. 3 farmland planting embodiments 2, film-coated and slow release fertilizer in No. 4 farmland planting embodiments 3, film-coated and slow release fertilizer in No. 5 farmland planting embodiments 4, film-coated and slow release fertilizer in No. 6 farmland planting embodiments 5, the mu volume increase in 1-6 farmland is added up, obtain mu volume increase data as shown in table 1:
Table 1
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (10)
1. the treated starch film-coated and slow release fertilizer containing humic acids, it is characterized in that, its raw material comprises following component by weight: urea 75-85 part, potassium superphosphate 2-5 part, sodium hydroxide 1-3 part, N, N '-methylene bisacrylamide acid acid amides 3-9 part, ammonium sulfate 1-5 part, ammonium chloride 2-6 part, potassium primary phosphate 1-4 part, deionized water 2-6 part, microcrystalline wax 2-8 part, collophanite powder 1-5 part, sodium alginate 2-8 part, treated starch 6-12 part, derivatived cellulose 3-9 part, humic acids 1-3 part, vinylformic acid 2-6 part, cupric pyrophosphate potassium 3-8 part, ammonium polyacrylate 2-6 part.
2. the treated starch film-coated and slow release fertilizer containing humic acids according to claim 1, it is characterized in that, its raw material comprises following component by weight: urea 76-84 part, potassium superphosphate 3-4 part, sodium hydroxide 1.5-2.5 part, N, N '-methylene bisacrylamide acid acid amides 4-8 part, ammonium sulfate 2-4 part, ammonium chloride 3-5 part, potassium primary phosphate 2-3 part, deionized water 3-5 part, microcrystalline wax 3-7 part, collophanite powder 2-4 part, sodium alginate 3-7 part, treated starch 7-11 part, derivatived cellulose 4-8 part, humic acids 1.5-2.5 part, vinylformic acid 3-5 part, cupric pyrophosphate potassium 4-7 part, ammonium polyacrylate 3-5 part.
3. the treated starch film-coated and slow release fertilizer containing humic acids according to claim 1 and 2, it is characterized in that, its raw material comprises following component by weight: 80 parts, urea, potassium superphosphate 3.5 parts, 2.0 parts, sodium hydroxide, N, N '-methylene bisacrylamide acid acid amides 6 parts, 3 parts, ammonium sulfate, ammonium chloride 4 parts, potassium primary phosphate 2.5 parts, deionized water 4 parts, microcrystalline wax 5 parts, 3 parts, collophanite powder, sodium alginate 5 parts, treated starch 9 parts, derivatived cellulose 6 parts, humic acids 2.0 parts, 4 parts, vinylformic acid, 5.5 parts, cupric pyrophosphate potassium, ammonium polyacrylate 4 parts.
4. to go a preparation method for the treated starch film-coated and slow release fertilizer containing humic acids described in any one of 1-3 according to right, it is characterized in that, comprise the steps:
The preparation of S1, slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, adds deionized water and obtains pasted starch in the stirred in water bath of 65-85 DEG C in treated starch; Under the water bath condition of 30-50 DEG C, in acrylic acid solution, dripping sodium hydroxide solution to PH is 5.1-5.9, and add collophanite powder and mix with pasted starch, after continuation interpolation deionized water and stirring is even, add potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides, derivatived cellulose, humic acids, ammonium polyacrylate to 65-85 DEG C, obtain the solution of coated fertilizer by the warming while stirring of 5 DEG C/min program after constant temperature polyreaction 0.5-1.5h;
The preparation of S2, slow-release fertilizer kernel: take urea by the weight part of above-mentioned formula, potassium primary phosphate, cupric pyrophosphate potassium, ammonium sulfate, ammonium chloride is embedded in sodium alginate, be heated to 65-85 DEG C, add after microcrystalline wax mixes and obtain slow-release fertilizer kernel;
S3, by the slow-release fertilizer kernel obtained in S2 under twirl with spray gun to even slow the solution spraying the coated fertilizer in S1 of urea surface, slow-release fertilizer core surface is all wrapped up by the solution of coated fertilizer, then will superscribe slow-release fertilizer kernel dry 2-4h at 60-90 DEG C of coated fertilizer solution, be cooled to room temperature preservation stand-by.
5. the preparation method of the treated starch film-coated and slow release fertilizer containing humic acids described in 4 will be gone according to right, it is characterized in that, in S1, the preparation of slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, adds deionized water and obtains pasted starch in the stirred in water bath of 68-82 DEG C; Under the water bath condition of 32-48 DEG C, in acrylic acid solution, dripping sodium hydroxide solution to PH is 5.2-5.8, and add collophanite powder and mix with pasted starch, after continuation interpolation deionized water and stirring is even, add potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides, derivatived cellulose, humic acids and ammonium polyacrylate to 68-82 DEG C, obtain the solution of coated fertilizer by the warming while stirring of 5 DEG C/min program after constant temperature polyreaction 0.8-1.2h.
6. the preparation method of the treated starch film-coated and slow release fertilizer containing humic acids according to claim 4 or 5, it is characterized in that, in S1, the preparation of slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, adds deionized water and obtains pasted starch in the stirred in water bath of 75 DEG C in treated starch; Under the water bath condition of 40 DEG C, in acrylic acid solution, dripping sodium hydroxide solution to PH is 5.7, and add collophanite powder and mix with pasted starch, after continuation interpolation deionized water and stirring is even, add potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides, derivatived cellulose, humic acids and ammonium polyacrylate, by the warming while stirring to 75 DEG C of 5 DEG C/min program, obtain the solution of coated fertilizer after constant temperature polyreaction 1.0h.
7. the preparation method of the treated starch film-coated and slow release fertilizer containing humic acids according to any one of claim 4-6, it is characterized in that, in S2, the preparation of slow-release fertilizer kernel: take urea by the weight part of above-mentioned formula, potassium primary phosphate, cupric pyrophosphate potassium, ammonium sulfate, ammonium chloride is embedded in sodium alginate, be heated to 68-82 DEG C, add after microcrystalline wax mixes and obtain slow-release fertilizer kernel.
8. the preparation method of the treated starch film-coated and slow release fertilizer containing humic acids according to any one of claim 4-7, it is characterized in that, in S2, the preparation of slow-release fertilizer kernel: take urea by the weight part of above-mentioned formula, potassium primary phosphate, cupric pyrophosphate potassium, ammonium sulfate, ammonium chloride is embedded in sodium alginate, be heated to 75 DEG C, add after microcrystalline wax mixes and obtain slow-release fertilizer kernel.
9. the preparation method of the treated starch film-coated and slow release fertilizer containing humic acids according to any one of claim 5-9, it is characterized in that, in S3, by under the slow-release fertilizer kernel twirl obtained in S2 with spray gun to even slow the solution spraying the coated fertilizer in S1 of urea surface, slow-release fertilizer core surface is all wrapped up by the solution of coated fertilizer, then will superscribe slow-release fertilizer kernel dry 2.5-3.5h at 65-85 DEG C of coated fertilizer solution, be cooled to room temperature preservation stand-by.
10. the preparation method of the treated starch film-coated and slow release fertilizer containing humic acids according to any one of claim 5-9, it is characterized in that, in S3, by under the slow-release fertilizer kernel twirl obtained in S2 with spray gun to even slow the solution spraying the coated fertilizer in S1 of urea surface, slow-release fertilizer core surface is all wrapped up by the solution of coated fertilizer, then will superscribe slow-release fertilizer kernel dry 3.0h at 75 DEG C of coated fertilizer solution, be cooled to room temperature preservation stand-by.
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| CN106810348A (en) * | 2016-12-14 | 2017-06-09 | 张明玉 | It is a kind of to have double-deck coated slow-release nitrogenous fertilizer of high-water performance and preparation method thereof concurrently |
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| CN106810348A (en) * | 2016-12-14 | 2017-06-09 | 张明玉 | It is a kind of to have double-deck coated slow-release nitrogenous fertilizer of high-water performance and preparation method thereof concurrently |
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| CN106748100A (en) * | 2016-12-15 | 2017-05-31 | 涓ュ垢 | A kind of low cost, the environmentally friendly film-coated and slow release fertilizer with water retaining function and preparation method thereof |
| CN111285740A (en) * | 2020-03-26 | 2020-06-16 | 张蕾 | Special fertilizer for overcoming soil continuous cropping obstacle |
| CN111285740B (en) * | 2020-03-26 | 2021-11-23 | 沈阳华清源农业发展有限公司 | Special fertilizer for overcoming soil continuous cropping obstacle |
| CN111792966A (en) * | 2020-07-29 | 2020-10-20 | 河北玮祺农业发展科技有限公司 | Water-soluble fertilizer based on precise planting and planting method thereof |
| CN112537982A (en) * | 2020-12-25 | 2021-03-23 | 安徽肥地肥业有限责任公司 | Special organic fertilizer for pomegranate planting and preparation method thereof |
| CN113292377A (en) * | 2021-06-22 | 2021-08-24 | 河北新宜化肥有限公司 | Method for preparing environment-friendly biological coated slow-release fertilizer |
| CN113527005A (en) * | 2021-08-04 | 2021-10-22 | 安徽省司尔特肥业股份有限公司 | Special stable formula fertilizer for corn and preparation method thereof |
| CN114057520A (en) * | 2021-10-22 | 2022-02-18 | 安徽儒商生物科技有限公司 | Humic acid coated slow release fertilizer and production process thereof |
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Application publication date: 20160224 |