CN105367230A - Modified starch-g-PVA / wood residue composite superabsorbent coated slow-release fertilizer - Google Patents
Modified starch-g-PVA / wood residue composite superabsorbent coated slow-release fertilizer Download PDFInfo
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Abstract
The invention presents a modified starch-g-PVA / wood residue composite superabsorbent coated slow-release fertilizer, which is composed of a slow-release fertilizer core and a slow-release fertilizer coating material. The slow-release fertilizer core comprises the raw materials of, by weight, 82-86 parts of urea, 2-8 parts of potassium sulfate, 1-5 parts of potassium dihydrogen phosphate, 2-6 parts of ammonium molybdate, 1-4 parts of magnesium sulfate, 2-5 parts of zinc sulfate, 1-3 parts of calcium phosphate, 1-4 parts of humic acid, 2-5 parts of attapulgite, 2-8 parts of borax and 3-9 parts of Bacillus subtilis. The coated slow-release fertilizer has good effect of water retention and slow release, wide source and low cost of coating materials, and can effectively promote the popularization of the coated slow-release fertilizer in the market.
Description
Technical field
The present invention relates to technical field, particularly relate to a kind of treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer.
Background technology
At present, slow release fertilizer just refers to that fertilizer nutrient rate of release is slow, and release period is longer, in the demand that can meet plant growth whole vegetative period of crop; Or refer to can according to plant growth demand number discharge, when crop is in fast growing period, just quick Releasing nutrient; When crop is in the cessation of growth cessation phase, just discharge less or do not discharge.
Slow release fertilizer is obtained by three kinds of main method: one is chemical process, delays dissolubility organic nitrogenous fertilizer or inorganic nitrogenous fertilizer, as urea formaldehyde, ammonium magnesium phosphate etc. by chemosynthesis; Two is physical methods, namely forms coated layer at fertilizer surface, to control its dissolution rate, as sulfur coated urea, polymerization encapsulate fertilizer; Three is biochemical methods, namely adds biochemical restrainer improvement fertilizer, as slowly-releasing carbon ammonium etc.
Slow release fertilizer has remarkable advantage, as decreased the nutrient etc. lost because of leaching and loss.But, slow release fertilizer is a kind of new-type fertilizer, its popularization must through a process, because its production cost is higher, relative common fertilizer price costly, little in the application of large Tanaka at present, be mainly applied in some lawns, golf course, nursery, flowers and in the commodity trees of some preciousnesses.
Timber belongs to porous material, be made up of various kinds of cell such as test-tube baby, xylon, conduit, parenchyma cells, there is cell walls and lumen in wood cell, wood cell wall exists a large amount of pit space, as China fir sapwood early, the average pit number of each test-tube baby of late wood is respectively 110,65, Pinus massoniana Lamb sapwood is early, the average pit number of each test-tube baby of late wood is 120,19.Wood cell also exists large kapillary and the different space of microscopic capillary two kinds of size structures, also referred to as the permanent space of timber and momentary clearance, so-called permanent space generally refers to its size, shape almost indeclinable space under drying or moisture state, as lumen, pit chamber etc., this portion void is larger.Momentary clearance is then that the space that time dry, completely dissolve is fallen, as space in cell walls etc., this portion void is less because swelling agent is formed for the moment.
The large capillary interstice be made up of lumen etc. is comparatively large, and generally all reach micron level, the lumen diameter as China fir is 35 μm, and the space of the margo on pit membrane is generally 0.1 ~ 1 μm, and the space on cell walls is generally 2-10nm.The diameter of moisture is about 0.4nm, and therefore, the space in wood cell enough allows water molecules to have the feature of progressively release or controllable release fertility by slow release fertilizer, is applicable to the rule of the fertilising feature such as forestry, flowers and plant-growth thereof.Current coated fertilizer is higher due to price, is difficult to further genralrlization, and current coated fertilizer major part is not degradable material, easily causes environmental pollution etc.
Summary of the invention
For solving the technical problem existed in background technology, the present invention proposes a kind of wooden slag film-coated and slow release fertilizer and preparation method thereof, this film-coated and slow release fertilizer water conservation and had good sustained release effect, and coated fertilizer source is wide, cost is low, effectively facilitates film-coated and slow release fertilizer commercially universal.
A kind of treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer that the present invention proposes, be made up of slow-release fertilizer kernel and slow-release fertilizer coating materials, the raw material of described slow-release fertilizer kernel comprises by weight: urea 82-86 part, potassium sulfate 2-8 part, potassium primary phosphate 1-5 part, ammonium molybdate 2-6 part, magnesium sulfate 1-4 part, zinc sulfate 2-5 part, calcium phosphate 1-3 part, humic acids 1-4 part, attapulgite 2-5 part, borax 2-8 part, Bacillus subtillis 3-9 part;
The raw material of described slow-release fertilizer coating materials comprises by weight: treated starch 1-9 part, collophanite powder 2-6 part, deionized water 3-8 part, wooden slag 3-15 part, PVA2-12 part, sodium hydroxide 3-6 part, vinylformic acid 1-3 divide, ammonium persulphate 1-5 part, potassium superphosphate 2-6 part, N,N methylene bis acrylamide 1-5 part, vinylbenzene 2-6 part;
Described treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer preparation method, comprises the steps:
The preparation of S1, slow-release fertilizer kernel: take urea, potassium sulfate, potassium primary phosphate, ammonium molybdate, magnesium sulfate, zinc sulfate, calcium phosphate and humic acids heating for dissolving by formulation weight part and obtain mixing solutions, mixing solutions is heated to 110-120 DEG C, heating terminates to add Bacillus subtillis in backward mixing solutions, at 30-38 DEG C of bottom fermentation 3-5 hour, mixing solutions after fermentation ends is dry, granulate, obtain slow-release fertilizer kernel;
S2, the preparation of slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, add deionized water and obtain pasted starch in the stirred in water bath of 65-85 DEG C, 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 wooden slag, PVA, potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides and ammonium persulphate press the warming while stirring of 5 DEG C/min program to 65-85 DEG C, the solution of slow-release fertilizer coating materials is obtained after constant temperature polyreaction 0.5-1.5h,
S3, the slow-release fertilizer kernel be prepared into by S1 spray the solution of the slow-release fertilizer coating materials obtained in S2 under twirl on slow-release fertilizer core surface with spray gun, obtain the treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer being coated with coated fertilizer.
Preferably, in S2, the concentration of sodium hydroxide solution is 8-12wt%.
Preferably, the raw material of slow-release fertilizer kernel comprises by weight: urea 83-85 part, potassium sulfate 3-7 part, potassium primary phosphate 2-4 part, ammonium molybdate 3-5 part, magnesium sulfate 2-3 part, zinc sulfate 3-4 part, calcium phosphate 1.5-2.5 part, humic acids 2-3 part, attapulgite 3-4 part, borax 3-7 part, Bacillus subtillis 4-8 part.
Preferably, the raw material of slow-release fertilizer kernel comprises by weight: 84 parts, urea, potassium sulfate 5 parts, potassium primary phosphate 3 parts, ammonium molybdate 4 parts, 2.5 parts, magnesium sulfate, 3.5 parts, zinc sulfate, 2.0 parts, calcium phosphate, humic acids 2.5 parts, attapulgite 3.5 parts, borax 5 parts, Bacillus subtillis 6 parts.
Preferably, the raw material of slow-release fertilizer coating materials comprises by weight: treated starch 2-8 part, collophanite powder 3-5 part, deionized water 4-7 part, wooden slag 4-14 part, PVA3-11 part, sodium hydroxide 3.5-5.5 part, vinylformic acid 1.5-2.5 divide, ammonium persulphate 1.5-4.5 part, potassium superphosphate 3-5 part, N,N methylene bis acrylamide 2-4 part, vinylbenzene 3-5 part.
Preferably, the raw material of slow-release fertilizer coating materials comprises by weight: treated starch 5 parts, 4 parts, collophanite powder, deionized water 5.5 parts, wooden slag 9 parts, PVA7 part, 4.5 parts, sodium hydroxide, 2.0 points, vinylformic acid, ammonium persulphate 2.5 parts, potassium superphosphate 4 parts, N,N methylene bis acrylamide 3 parts, vinylbenzene 4 parts.
Preferably, in S1, the preparation of slow-release fertilizer kernel: take urea, potassium sulfate, potassium primary phosphate, ammonium molybdate, magnesium sulfate, zinc sulfate, calcium phosphate and humic acids heating for dissolving by formulation weight part and obtain mixing solutions, be 112-118 DEG C by Hybrid Heating temperature, heating terminates to add Bacillus subtillis at 32-36 DEG C of bottom fermentation 3.5-4.5 hour in backward mixing solutions, mixing solutions after fermentation ends is dry, granulate, obtain slow-release fertilizer kernel.
Preferably, in S1, the preparation of slow-release fertilizer kernel: take urea, potassium sulfate, potassium primary phosphate, ammonium molybdate, magnesium sulfate, zinc sulfate, calcium phosphate and humic acids heating for dissolving by formulation weight part and obtain mixing solutions, it is 116 DEG C by Hybrid Heating temperature, heating terminates to add in backward mixing solutions Bacillus subtillis 34 DEG C of bottom fermentations 4.0 hours, mixing solutions after fermentation ends is dry, granulate, obtain slow-release fertilizer kernel.
Preferably, in S2, the preparation of slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, add deionized water and obtain pasted starch in the stirred in water bath of 67-82 DEG C, under the water bath condition of 35-45 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 wooden slag, PVA, potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides and ammonium persulphate press the warming while stirring of 5 DEG C/min program to 70-80 DEG C, the solution of slow-release fertilizer coating materials is obtained after constant temperature polyreaction 0.8-1.2h.
Preferably, in S2, the preparation of slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, add deionized water and obtain pasted starch in the stirred in water bath of 69 DEG C, under the water bath condition of 40 DEG C, in acrylic acid solution, dripping sodium hydroxide solution to PH is 5.5, and add collophanite powder and mix with pasted starch, after continuation interpolation deionized water and stirring is even, add wooden slag, PVA, potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides and ammonium persulphate are by the warming while stirring to 75 DEG C of 5 DEG C/min program, the solution of slow-release fertilizer coating materials is obtained after constant temperature polyreaction 1.0h.
In the present invention, by by urea, potassium sulfate, potassium primary phosphate, ammonium molybdate, magnesium sulfate, zinc sulfate, carry out fermentation with Bacillus subtillis after calcium phosphate and humic acids mix and obtain film-coated and slow release fertilizer kernel, then by treated starch with after deionized water gelatinization, after regulating PH with sodium hydroxide, continue to add deionized water and stirring after adding the mixing of collophanite powder, then wooden slag is added, PVA, potassium superphosphate, N, treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer is obtained after N '-methylene bisacrylamide acid acid amides and persulfuric acid polymerization, because film-coated and slow release fertilizer coated fertilizer adopts wooden slag as the major ingredient of slow-release fertilizer coating materials, make use of a large amount of spaces that wooden slag itself exists, fertilizer is progressively outwards shifted, play slow releasing fertilizer or the function of fertilizer release rate can be controlled as required, and this film-coated and slow release fertilizer adopts treated starch after deionized water gelatinization, the pasted starch obtained makes the coated fertilizer of film-coated and slow release fertilizer stick together, meet water due to pasted starch can degrade, housing becomes loose, form another passage that fertilizer shifts from inside to outside, under the effect of these two kinds of passages, fertilizer is endlessly to exosmosis, plant nutrient is provided, play slow/controlled release effect, both ensure that plant constantly can obtain nutrient in its process of growth, turn avoid the phenomenon that single-dose application too much causes burning seedling, owing to the reason such as to rain heavily after also effectively prevent fertilising, excessive rainfall causes the phenomenon of fertilizer loss, film-coated and slow release fertilizer coated fertilizer adopts wooden slag and pasted starch manufacture to form, be imbedded in soil and can degrade soon, be transformed into fertilizer, absorb for plant-growth, this slow-release fertilizer coating materials can not cause detrimentally affect to plant, whole slow-release fertilizer coating materials can be degraded, and remains without residuum, nontoxic, pollution-free etc.
In the present invention, film-coated and slow release fertilizer kernel is by urea, potassium sulfate, potassium primary phosphate, ammonium molybdate, magnesium sulfate, zinc sulfate, after calcium phosphate and humic acids mix, ferment through Bacillus subtillis, the film-coated and slow release fertilizer kernel obtained has N, P, K, S, Ca, the elements such as Mu, growth for plant provides necessary growth elements, and coordinate humic acids simultaneously, change saliferous in soil too high, alkalescence is excessively strong, grogs high dispersing, the physicochemical character of Soil structure difference, promote the formation of soil agreegate, make the state that Soil conservation is good, thus grow for plant root growth and create good condition, can to loosen topsoil soils simultaneously, destroy the accumulation of salt, reduce the native saltiness of table, play every salt action, improve seedling rate, reduce weak seedling, dead seedling, plant health is grown up.
In the present invention, the coated fertilizer of film-coated and slow release fertilizer adopts treated starch and wooden slag as the material of main part of the coated fertilizer of film-coated and slow release fertilizer, and wooden slag and treated starch cheap, material is easy to get, relatively with film-coated and slow release fertilizer of the prior art, cost is low, effectively raises film-coated and slow release fertilizer occupation rate commercially.
Meanwhile, due to by treated starch and PVA graft polymerization, then treated starch-g-PVA is mixed with wooden slag, obtain treated starch-g-PVA/ wood slag mixing high-hydroscopicity film-coated and slow release fertilizer, wherein, polyvinyl alcohol (PVA) is a kind of water soluble polymer, has good film-forming properties; Treated starch is the biodegradable natural high moleculer eompound of a class, graft copolymerization can be carried out under certain condition with polyvinyl alcohol, treated starch-the g-PVA formed effectively can improve the sustained release performance of film-coated and slow release fertilizer coated fertilizer, improves the utilization ratio of fertilizer.
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-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer of the present invention, be made up of slow-release fertilizer kernel and slow-release fertilizer coating materials, the raw material of described slow-release fertilizer kernel comprises by weight: urea can be 82,83,84,85,86 parts; Potassium sulfate can be 2,3,4,5,6,7,8 parts; Potassium primary phosphate can be 1,2,3,4,5 part; Ammonium molybdate can be 2,3,4,5,6 parts; Magnesium sulfate can be 1.0,1.5,2.0,2.5,3.0,3.5,4.0 parts; Zinc sulfate can be 2.0,2.5,3.0,3.5,4.0,4.5,5.0 parts; Calcium phosphate can be 1.0,1.5,2.0,2.5,3.0 parts; Humic acids can be 1.0,1.5,2.0,2.5,3.0,3.5,4.0 parts; Attapulgite can be 2.0,2.5,3.0,3.5,4.0,4.5,5.0 parts; Borax can be 2.0,2.5,3.0,3.5,4.0,4.5,5.0,5.5,6.0,6.5,7.0,7.5,8.0 parts; Bacillus subtillis can be 3,4,5,6,7,8,9 parts.
The raw material of described slow-release fertilizer coating materials comprises by weight: treated starch can be 1,2,3,4,5,6,7,8,9 part; Collophanite powder can be 2,3,4,5,6 parts; Deionized water can be 3.0,3.5,4.0,4.5,5.0,5.5,6.0,6.5,7.0,7.5,8.0 parts; Wood slag can be 3,4,5,6,7,8,9,10,11,12,13,14,15 parts; PVA can be 2,3,4,5,6,7,8,9,10,11,12 parts; Sodium hydroxide can be 3.0,3.5,4.0,4.5,5.0,5.5,6.0 parts; Vinylformic acid can be 1.0,1.5,2.0,2.5,3.0 points; Ammonium persulphate can be 1.0,1.5,2.0,2.5,3.0,3.5,4.0,4.5,5.0 parts; Potassium superphosphate can be 2,3,4,5,6 parts; N,N methylene bis acrylamide can be 1,2,3,4,5 part; Vinylbenzene can be 2,3,4,5,6 parts.
Embodiment 1
A kind of treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer of the present invention, be made up of slow-release fertilizer kernel and slow-release fertilizer coating materials, the raw material of described slow-release fertilizer kernel comprises by weight: 84 parts, urea, potassium sulfate 5 parts, potassium primary phosphate 3 parts, ammonium molybdate 4 parts, 2.5 parts, magnesium sulfate, 3.5 parts, zinc sulfate, 2.0 parts, calcium phosphate, humic acids 2.5 parts, attapulgite 3.5 parts, borax 5 parts, Bacillus subtillis 6 parts.
The raw material of described slow-release fertilizer coating materials comprises by weight: treated starch 5 parts, 4 parts, collophanite powder, deionized water 5.5 parts, wooden slag 9 parts, PVA7 part, 4.5 parts, sodium hydroxide, 2.0 points, vinylformic acid, ammonium persulphate 2.5 parts, potassium superphosphate 4 parts, N,N methylene bis acrylamide 3 parts, vinylbenzene 4 parts.
Treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer preparation method of the present invention, comprises the steps:
The preparation of S1, slow-release fertilizer kernel: take urea, potassium sulfate, potassium primary phosphate, ammonium molybdate, magnesium sulfate, zinc sulfate, calcium phosphate and humic acids heating for dissolving by formulation weight part and obtain mixing solutions, it is 116 DEG C by Hybrid Heating temperature, heating terminates to add in backward mixing solutions Bacillus subtillis 34 DEG C of bottom fermentations 4.0 hours, mixing solutions after fermentation ends is dry, granulate, obtain slow-release fertilizer kernel;
S2, the preparation of slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, add deionized water and obtain pasted starch in the stirred in water bath of 69 DEG C, under the water bath condition of 40 DEG C, in acrylic acid solution, dripping sodium hydroxide solution to PH is 5.5, and add collophanite powder and mix with pasted starch, after continuation interpolation deionized water and stirring is even, add wooden slag, PVA, potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides and ammonium persulphate are by the warming while stirring to 75 DEG C of 5 DEG C/min program, the solution of slow-release fertilizer coating materials is obtained after constant temperature polyreaction 1.0h,
S3, the slow-release fertilizer kernel be prepared into by S1 spray the solution of the slow-release fertilizer coating materials obtained in S2 under twirl on slow-release fertilizer core surface with spray gun, obtain the treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer being coated with coated fertilizer.
Embodiment 2
A kind of treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer of the present invention, be made up of slow-release fertilizer kernel and slow-release fertilizer coating materials, the raw material of described slow-release fertilizer kernel comprises by weight: 82 parts, urea, potassium sulfate 8 parts, potassium primary phosphate 1 part, ammonium molybdate 6 parts, 1 part, magnesium sulfate, 5 parts, zinc sulfate, 1 part, calcium phosphate, humic acids 4 parts, attapulgite 2 parts, borax 8 parts, Bacillus subtillis 3 parts;
The raw material of described slow-release fertilizer coating materials comprises by weight: treated starch 1 part, 6 parts, collophanite powder, deionized water 3 parts, wooden slag 15 parts, PVA2 part, 6 parts, sodium hydroxide, 1 point, vinylformic acid, ammonium persulphate 5 parts, potassium superphosphate 2 parts, N,N methylene bis acrylamide 5 parts, vinylbenzene 2 parts.
Treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer preparation method of the present invention, comprises the steps:
The preparation of S1, slow-release fertilizer kernel: take urea, potassium sulfate, potassium primary phosphate, ammonium molybdate, magnesium sulfate, zinc sulfate, calcium phosphate and humic acids heating for dissolving by formulation weight part and obtain mixing solutions, mixing solutions is heated to 110 DEG C, heating terminates to add Bacillus subtillis in backward mixing solutions, 38 DEG C of bottom fermentations 3 hours, mixing solutions after fermentation ends is dry, granulate, obtain slow-release fertilizer kernel;
S2, the preparation of slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, add deionized water and obtain pasted starch in the stirred in water bath of 65 DEG C, 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 wooden slag, PVA, potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides and ammonium persulphate are by the warming while stirring to 85 DEG C of 5 DEG C/min program, the solution of slow-release fertilizer coating materials is obtained after constant temperature polyreaction 0.5h,
S3, the slow-release fertilizer kernel be prepared into by S1 spray the solution of the slow-release fertilizer coating materials obtained in S2 under twirl on slow-release fertilizer core surface with spray gun, obtain the treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer being coated with coated fertilizer.
Embodiment 3
A kind of treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer of the present invention, be made up of slow-release fertilizer kernel and slow-release fertilizer coating materials, the raw material of described slow-release fertilizer kernel comprises by weight: 86 parts, urea, potassium sulfate 2 parts, potassium primary phosphate 5 parts, ammonium molybdate 2 parts, 4 parts, magnesium sulfate, 2 parts, zinc sulfate, 3 parts, calcium phosphate, humic acids 1 part, attapulgite 5 parts, borax 2 parts, Bacillus subtillis 9 parts;
The raw material of described slow-release fertilizer coating materials comprises by weight: treated starch 9 parts, 2 parts, collophanite powder, deionized water 8 parts, wooden slag 3 parts, PVA12 part, 3 parts, sodium hydroxide, 3 points, vinylformic acid, ammonium persulphate 1 part, potassium superphosphate 6 parts, N,N methylene bis acrylamide 1 part, vinylbenzene 6 parts.
Treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer preparation method of the present invention, comprises the steps:
The preparation of S1, slow-release fertilizer kernel: take urea, potassium sulfate, potassium primary phosphate, ammonium molybdate, magnesium sulfate, zinc sulfate, calcium phosphate and humic acids heating for dissolving by formulation weight part and obtain mixing solutions, mixing solutions is heated to 120 DEG C, heating terminates to add Bacillus subtillis in backward mixing solutions, 30 DEG C of bottom fermentations 5 hours, mixing solutions after fermentation ends is dry, granulate, obtain slow-release fertilizer kernel;
S2, the preparation of slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, add deionized water and obtain pasted starch in the stirred in water bath of 85 DEG C, 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 wooden slag, PVA, potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides and ammonium persulphate are by the warming while stirring to 65 DEG C of 5 DEG C/min program, the solution of slow-release fertilizer coating materials is obtained after constant temperature polyreaction 1.5h,
S3, the slow-release fertilizer kernel be prepared into by S1 spray the solution of the slow-release fertilizer coating materials obtained in S2 under twirl on slow-release fertilizer core surface with spray gun, obtain the treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer being coated with coated fertilizer.
Embodiment 4
A kind of treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer of the present invention, be made up of slow-release fertilizer kernel and slow-release fertilizer coating materials, the raw material of described slow-release fertilizer kernel comprises by weight:
The preparation of S1, slow-release fertilizer kernel: take urea, potassium sulfate, potassium primary phosphate, ammonium molybdate, magnesium sulfate, zinc sulfate, calcium phosphate and humic acids heating for dissolving by formulation weight part and obtain mixing solutions, it is 112 DEG C by Hybrid Heating temperature, heating terminates to add in backward mixing solutions Bacillus subtillis 36 DEG C of bottom fermentations 3.5 hours, mixing solutions after fermentation ends is dry, granulate, obtain slow-release fertilizer kernel;
S2, the preparation of slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, add deionized water and obtain pasted starch in the stirred in water bath of 67 DEG C, under the water bath condition of 45 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 wooden slag, PVA, potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides and ammonium persulphate are by the warming while stirring to 80 DEG C of 5 DEG C/min program, the solution of slow-release fertilizer coating materials is obtained after constant temperature polyreaction 0.8h,
S3, the slow-release fertilizer kernel be prepared into by S1 spray the solution of the slow-release fertilizer coating materials obtained in S2 under twirl on slow-release fertilizer core surface with spray gun, obtain the treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer being coated with coated fertilizer.
Embodiment 5
A kind of treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer of the present invention, be made up of slow-release fertilizer kernel and slow-release fertilizer coating materials, the raw material of described slow-release fertilizer kernel comprises by weight:
The preparation of S1, slow-release fertilizer kernel: take urea, potassium sulfate, potassium primary phosphate, ammonium molybdate, magnesium sulfate, zinc sulfate, calcium phosphate and humic acids heating for dissolving by formulation weight part and obtain mixing solutions, it is 118 DEG C by Hybrid Heating temperature, heating terminates to add in backward mixing solutions Bacillus subtillis 32 DEG C of bottom fermentations 4.5 hours, mixing solutions after fermentation ends is dry, granulate, obtain slow-release fertilizer kernel;
S2, the preparation of slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, add deionized water and obtain pasted starch in the stirred in water bath of 82 DEG C, under the water bath condition of 35 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 wooden slag, PVA, potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides and ammonium persulphate are by the warming while stirring to 70 DEG C of 5 DEG C/min program, the solution of slow-release fertilizer coating materials is obtained after constant temperature polyreaction 1.2h,
S3, the slow-release fertilizer kernel be prepared into by S1 spray the solution of the slow-release fertilizer coating materials obtained in S2 under twirl on slow-release fertilizer core surface with spray gun, obtain the treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer being coated with coated fertilizer.
Treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer in above-described embodiment 1-5 is applied in actual plantation, choose the farmland of six pieces of same areas, six pieces of farmlands are divided into No. 1-6 plantation field, wherein No. 1 farmland uses common film-coated and slow release fertilizer, treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer in No. 2 farmland use embodiments 1, by that analogy, through contrasting discovery after a while: after No. 1 farmland uses the treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer in the embodiment of the present invention 1, farm crop germinate fast, plant is healthy, rice shoot is glossy, fast growth, compared with using the farmland of common film-coated and slow release fertilizer, every mu of volume increase 148-156 kilogram.
As from the foregoing, treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer of the present invention, for in the process of proportion of crop planting, the Water-saving effect of fertilizer can be improved, serve the speed slowing down film-coated and slow release fertilizer nutrients release simultaneously, effectively improve the production capacity of the unit surface of farm crop.
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. a treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer, be made up of slow-release fertilizer kernel and slow-release fertilizer coating materials, it is characterized in that, the raw material of described slow-release fertilizer kernel comprises by weight: urea 82-86 part, potassium sulfate 2-8 part, potassium primary phosphate 1-5 part, ammonium molybdate 2-6 part, magnesium sulfate 1-4 part, zinc sulfate 2-5 part, calcium phosphate 1-3 part, humic acids 1-4 part, attapulgite 2-5 part, borax 2-8 part, Bacillus subtillis 3-9 part;
The raw material of described slow-release fertilizer coating materials comprises by weight: treated starch 1-9 part, collophanite powder 2-6 part, deionized water 3-8 part, wooden slag 3-15 part, PVA2-12 part, sodium hydroxide 3-6 part, vinylformic acid 1-3 divide, ammonium persulphate 1-5 part, potassium superphosphate 2-6 part, N,N methylene bis acrylamide 1-5 part, vinylbenzene 2-6 part;
Described treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer preparation method, comprises the steps:
The preparation of S1, slow-release fertilizer kernel: take urea, potassium sulfate, potassium primary phosphate, ammonium molybdate, magnesium sulfate, zinc sulfate, calcium phosphate and humic acids heating for dissolving by formulation weight part and obtain mixing solutions, mixing solutions is heated to 110-120 DEG C, heating terminates to add Bacillus subtillis in backward mixing solutions, at 30-38 DEG C of bottom fermentation 3-5 hour, mixing solutions after fermentation ends is dry, granulate, obtain slow-release fertilizer kernel;
S2, the preparation of slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, add deionized water and obtain pasted starch in the stirred in water bath of 65-85 DEG C, 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 wooden slag, PVA, potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides and ammonium persulphate press the warming while stirring of 5 DEG C/min program to 65-85 DEG C, the solution of slow-release fertilizer coating materials is obtained after constant temperature polyreaction 0.5-1.5h,
S3, the slow-release fertilizer kernel be prepared into by S1 spray the solution of the slow-release fertilizer coating materials obtained in S2 under twirl on slow-release fertilizer core surface with spray gun, obtain the treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer being coated with coated fertilizer.
2. treated starch-g-PVA/ wood slag composite water absorbing film-coated and slow release fertilizer according to claim 1, it is characterized in that, in S2, the concentration of sodium hydroxide solution is 8-12wt%.
3. treated starch-g-PVA/ wood slag composite high-water-absorptivresin film-coated and slow release fertilizer according to claim 1 and 2, it is characterized in that, the raw material of slow-release fertilizer kernel comprises by weight: urea 83-85 part, potassium sulfate 3-7 part, potassium primary phosphate 2-4 part, ammonium molybdate 3-5 part, magnesium sulfate 2-3 part, zinc sulfate 3-4 part, calcium phosphate 1.5-2.5 part, humic acids 2-3 part, attapulgite 3-4 part, borax 3-7 part, Bacillus subtillis 4-8 part.
4. treated starch-g-PVA/ wood slag composite high-water-absorptivresin the film-coated and slow release fertilizer according to any one of claim 1-3, it is characterized in that, the raw material of described slow-release fertilizer kernel comprises by weight: 84 parts, urea, potassium sulfate 5 parts, potassium primary phosphate 3 parts, ammonium molybdate 4 parts, 2.5 parts, magnesium sulfate, 3.5 parts, zinc sulfate, 2.0 parts, calcium phosphate, humic acids 2.5 parts, attapulgite 3.5 parts, borax 5 parts, Bacillus subtillis 6 parts.
5. treated starch-g-PVA/ wood slag composite high-water-absorptivresin the film-coated and slow release fertilizer according to any one of claim 1-4, it is characterized in that, the raw material of slow-release fertilizer coating materials comprises by weight: treated starch 2-8 part, collophanite powder 3-5 part, deionized water 4-7 part, wooden slag 4-14 part, PVA3-11 part, sodium hydroxide 3.5-5.5 part, vinylformic acid 1.5-2.5 divide, ammonium persulphate 1.5-4.5 part, potassium superphosphate 3-5 part, N,N methylene bis acrylamide 2-4 part, vinylbenzene 3-5 part.
6. treated starch-g-PVA/ wood slag composite high-water-absorptivresin the film-coated and slow release fertilizer according to any one of claim 1-5, it is characterized in that, the raw material of slow-release fertilizer coating materials comprises by weight: treated starch 5 parts, 4 parts, collophanite powder, deionized water 5.5 parts, wooden slag 9 parts, PVA7 part, 4.5 parts, sodium hydroxide, 2.0 points, vinylformic acid, ammonium persulphate 2.5 parts, potassium superphosphate 4 parts, N,N methylene bis acrylamide 3 parts, vinylbenzene 4 parts.
7. treated starch-g-PVA/ wood slag composite high-water-absorptivresin the film-coated and slow release fertilizer according to any one of claim 1-6, it is characterized in that, in S1, the preparation of slow-release fertilizer kernel: take urea by formulation weight part, potassium sulfate, potassium primary phosphate, ammonium molybdate, magnesium sulfate, zinc sulfate, calcium phosphate and humic acids heating for dissolving obtain mixing solutions, be 112-118 DEG C by Hybrid Heating temperature, heating terminates to add Bacillus subtillis at 32-36 DEG C of bottom fermentation 3.5-4.5 hour in backward mixing solutions, mixing solutions after fermentation ends is dry, granulate, obtain slow-release fertilizer kernel.
8. treated starch-g-PVA/ wood slag composite highly effective water-absorbent the film-coated and slow release fertilizer according to any one of claim 1-7, it is characterized in that, in S1, the preparation of slow-release fertilizer kernel: take urea, potassium sulfate, potassium primary phosphate, ammonium molybdate, magnesium sulfate, zinc sulfate, calcium phosphate and humic acids heating for dissolving by formulation weight part and obtain mixing solutions, it is 116 DEG C by Hybrid Heating temperature, heating terminates to add in backward mixing solutions Bacillus subtillis 34 DEG C of bottom fermentations 4.0 hours, mixing solutions after fermentation ends is dry, granulate, obtain slow-release fertilizer kernel.
9. treated starch-g-PVA/ wood slag composite highly effective water-absorbent the film-coated and slow release fertilizer according to any one of claim 1-8, it is characterized in that, in S2, the preparation of slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, add deionized water and obtain pasted starch in the stirred in water bath of 67-82 DEG C, under the water bath condition of 35-45 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 wooden slag, PVA, potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides and ammonium persulphate press the warming while stirring of 5 DEG C/min program to 70-80 DEG C, the solution of slow-release fertilizer coating materials is obtained after constant temperature polyreaction 0.8-1.2h.
10. treated starch-g-PVA/ wood slag composite highly effective water-absorbent the film-coated and slow release fertilizer according to any one of claim 1-9, it is characterized in that, in S2, the preparation of slow-release fertilizer coating materials: take treated starch by above-mentioned formulation weight part, add deionized water and obtain pasted starch in the stirred in water bath of 69 DEG C, under the water bath condition of 40 DEG C, in acrylic acid solution, dripping sodium hydroxide solution to PH is 5.5, and add collophanite powder and mix with pasted starch, after continuation interpolation deionized water and stirring is even, add wooden slag, PVA, potassium superphosphate, N, N '-methylene bisacrylamide acid acid amides and ammonium persulphate are by the warming while stirring to 75 DEG C of 5 DEG C/min program, the solution of slow-release fertilizer coating materials is obtained after constant temperature polyreaction 1.0h.
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