CN101786927A - Anti-drought slow-release compound fertilizer and preparation method thereof - Google Patents
Anti-drought slow-release compound fertilizer and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an anti-drought slow-release compound fertilizer and a preparation method thereof. The anti-drought slow-release compound fertilizer comprises compound fertilizers and the following three coating layers which coat the compound fertilizers from inside to outside: a water-fertilizer isolating and curing layer, a slow-release layer and a moisture adjusting layer. The anti-drought slow-release compound fertilizer has anti-drought function, supports slow release of the compound fertilizers and is simultaneously environment-friendly and low in cost. The preparation method is characterized by firstly physically mixing respective components of the three coating layers, the compound fertilizers and polyethylene glycol aqueous solution uniformly in proportion, then coating the three coating layers on the compound fertilizers by a granulator from inside to outside in sequence, and finally taking the compound fertilizers out of the granulator and drying the compound fertilizers in the sun or in a drying machine at 55-65 DEG C until the moisture content is less than 10%.
Description
Technical field
The present invention relates to a kind of agrochemical, especially a kind of slow-release compound fertilizer with drought resisting function.The invention still further relates to the preparation method of this anti-drought slow-release compound fertilizer.
Background technology
Because factors such as loss, volatilization, infiltration, soil block cause in the agriculture production utilization rate of fertilizer lower, general nitrogenous fertilizer is 18%-45%, and phosphate fertilizer is 12.5%-30%, and potash fertilizer is 30%-50%.This not only causes direct financial loss, has caused the serious environmental pollution simultaneously.Raw materials for production urea, phosphate fertilizer and the potash fertilizer of compound fertilizer, all come from non-renewable precious resources such as Sweet natural gas, petroleum gas, coke(oven)gas, coal, therefore, improving utilization rate of fertilizer can economize on resources greatly, reducing nitrogen loss pollutes soil, water and atmospheric latency environment, also be energy-saving and emission-reduction simultaneously, reduce the important channel of carbon emission.The slow-release fertilizer technology provides a valid approach for addressing this problem.
Slow release fertilizer is a kind of environmental friendly fertilizer, also is the focus and the difficult point in international new-type fertilizer development field.Slow release fertilizer is by the certain physical method chemical fertilizer to be wrapped by, dissolving or crosslinked preparation with specific material, can progressively bring into play fertilizer efficiency according to the demand of crop different growing stage after using, and the time generally can reach some months, even 1 year.
The slow-release fertilizer course of processing and kind mainly contain several big classes both at home and abroad: a class is that physical microencapsulation anti-drought slow-release or global approach dissolving form, as the release and release control fertilizer of organic polymer anti-drought slow-release.With synthetic organic polymer polymkeric substance proportion maximum, be characterized in anti-drought slow-release controllable thickness, very inresponsive to edaphic condition, the nutrient rate of diffusion can realize the controlled release to nutrient by the chemical property control of polymkeric substance.Shortcoming is an anti-drought slow-release material price height, the complete processing complexity, and the degradability of film is poor, causes soil pollution easily.Second class is the chemosynthesis type, and the organic or inorganic compound is connected on the preformed polymkeric substance directly or indirectly.Adopt sulphur, paraffin, pitch, resin etc. to be insoluble in the material of water, its production technology process is simple, production prices are 1-2 times of common fertilizer, do not constitute pollution to environmental factors such as soil, but inorganic drought resisting slow-release material slow-releasing is relatively poor, and its nutrient discharges the needs that are difficult to adapt to crop.As fused(calcium magnesium)phosphate, coating urea, sulphur drought-resistant slow-release urea etc.The production process complexity of sulphur anti-drought slow-release, cost is higher, and applies this fertilizer for a long time, can cause soil acidification, destroys Soil structure.The 3rd class is the Chemical Inhibition type, adds urease inhibitor or nitrification inhibitor.Nitrification inhibitors such as employing urease inhibitor suppress the conversion of ammonium nitrogen to the nitrite nitrogen form, keep the ammonium nitrogen form, are adsorbed on the soil granular surface, reduce the drip washing loss of nitric nitrogen.
Both at home and abroad slow-release fertilizer has been subjected to extensive concern, but has relevantly both had a slow-release function, and fertilizer research that again can the drought-relief function seldom.Lanzhou University is mixed and made into urea, primary ammonium phosphate and carboxymethyl starch powder granular, use inverse suspension method at this fertiliser granulates outsourcing last layer ammonium polyacrylate then, make the slow-release compound and mixed fertilizer with water-absorbing-retaining function of nitrogen content 22.6%, phosphorus content 7.2%, it is inhaled tap water and reaches 85 times.In addition, also made the particle of urea formaldehyde, wrapped one deck ammonium polyacrylate by inverse suspension method in particle outside then, made water-intake rate and be 95 times, the slowly-releasing urea formaldehyde particle of nitrogen content 22.6% with the method for the crosslinked sodium alginate of calcium chloride.Nanjing Forestry University is starch and polyvinyl alcohol solution mixing gelatinization, then to the urea anti-drought slow-release, and the dry crosslinked water-retentivity slow release fertilizer that makes.Japan adds in the urea-containing saturated aqueous solution with potato starch, and oven dry can make the fertilizer that existing certain water-absorbing-retaining effect again can slowly-releasing then.
The preparation of slow-release fertilizer stresses the selection and the complete processing of coated fertilizer, but, which kind of sustained-controll-release fertiliser no matter, all be subjected to the restriction of soil, irrigation, rainfall conditions during application, particularly in the arid and semi-arid lands, adopt environmentally friendly material and common process technology, the slow-release fertilizer that preparation has drought resisting water-absorbing-retaining function becomes raising fertilizer utilization efficiency, the staple product of water-saving and synergistic and the focus of chemical fertilizer improvement research.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of anti-drought slow-release compound fertilizer, has not only had the drought resisting function, but also has supported the slowly-releasing of compound fertilizer, and it is environmentally friendly and with low cost simultaneously; For this reason, the present invention also will provide a kind of preparation this anti-drought slow-release compound fertilizer method.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of anti-drought slow-release compound fertilizer, comprise that compound is fertile and from inside to outside compound fertilizer is wrapped three bag tegillums of quilt: liquid manure is isolated conservation layer, slow release layer and moisture regulating course, and liquid manure is isolated each component that conservation layer comprised and is respectively with the weight ratio of compound fertilizer: pre-gelatinized starch 3-10%, hydroxyethylamyle 1-2%, Magnesium Stearate 0.1-0.5%, yellow starch gum 0.4-2%, borax 0.1-0.8%; Each component that slow release layer comprised and be respectively: multifunctional creep control-released agent 10-15%, wilkinite 8-15% with the weight ratio of compound fertilizer; Each component that the moisture regulating course is comprised and be respectively: efficient drought-resistant agent 10-20%, carboxymethyl cellulose 2-4%, poly-aspartic-acid 0.1-2%, kaolin 2-6%, talcum powder 0.5-1% with the weight ratio of compound fertilizer.
The particle diameter of described multifunctional creep control-released agent, efficient drought-resistant agent, Magnesium Stearate, yellow starch gum, borax is less than 0.25mm.
Described efficient drought-resistant agent water-intake rate is more than 400 times, and particle diameter is less than 0.25mm.
The particle diameter of described pre-gelatinized starch, hydroxyethylamyle, carboxymethyl cellulose, poly-aspartic-acid is less than 0.15mm.
Described wilkinite, kaolin, talcous particle diameter are less than 0.05mm.
A kind of method for preparing this anti-drought slow-release compound fertilizer uses tablets press that compound fertilizer is wrapped quilt, and its step is as follows:
(1) bag is isolated conservation layer by liquid manure: with described liquid manure isolate each component, the compound fertilizer of conservation layer, the polyoxyethylene glycol aqueous solution of 4-6g/L carries out the physics mixing in proportion, wherein the weight ratio of the polyoxyethylene glycol aqueous solution and compound fertilizer is 4-8.5%, granulation in tablets press then;
(2) wrap by slow release layer: each component of described slow release layer, the compound fertilizer of step (1) preparation, the polyoxyethylene glycol aqueous solution of 4-6g/L are carried out the physics mixing in proportion, wherein the weight ratio of the polyoxyethylene glycol aqueous solution and compound fertilizer is 4-8.5%, granulation in tablets press then;
(3) wrap by the moisture regulating course: each component of described moisture regulating course, the compound fertilizer of step (2) preparation, the polyoxyethylene glycol aqueous solution of 4-6g/L are carried out the physics mixing in proportion, wherein the weight ratio of the polyoxyethylene glycol aqueous solution and compound fertilizer is 4-8.5%, granulation in tablets press then;
(4) the compound fertilizer with step (3) preparation takes out from tablets press, dries or dry moisture content less than 10% under 55-65 ℃ of condition in dryer.
The molecular weight of described polyoxyethylene glycol is 400-600.
Described tablets press is cylinder or granulating disc, and its working speed is 50-60r/min, and the inclination angle is 1.5-3.0 °.
Adopt the beneficial effect that technique scheme produced to be:
Pre-gelatinized starch in the liquid manure isolation conservation layer, hydroxyethylamyle etc. are met water-soluble bulging and become glued membrane, and are smooth bright, water-resistant stability and gel-strength are all higher, as the binding agent of slow-release fertilizer, with fertile combination of compound pre-gelatinization there is promoter action, assist to reach the excellent results of slow liberating nitrogen; Simultaneously, sufficient raw such as pre-gelatinized starch, hydroxyethylamyle, low price, the degraded back is fertilizer, and is free from environmental pollution.Multifunctional slow-release agent in the nutrient slowly-released layer has three-dimensional net structure, and is water insoluble, but water-swellable can be in the same place with fertilizer, biotechnological formulation and water etc. are closely fused, reaches and absorbs the purpose that gentle slow release is put fertilizer and water repeatedly; The liquid manure slow release layer can absorb the nitrogen that discharges by liquid manure isolation conservation layer and be kept in the tridimensional network of sustained release dosage, makes the release of nutrient have certain resiliency, and nutrient slowly discharges, and improves fertilizer utilization ratio.The water-intake rate of the efficient drought-resistant agent in the moisture regulating course is up to 1449 times, can absorb a large amount of water and fertilizer, around plant rhizosphere, form " liquid manure storage vault ", reducing liquid manure runs off, prolong fertilizer efficiency, the drought resisting superior performance at arid, semiarid zone and arid season, still can be brought into play the slow release effect of water, fertilizer effectively.Adopt tablets press that compound fertilizer is carried out layering bag quilt, this preparation method utilizes the existing installation tablets press, and need not increases or transform other equipment, can realize suitability for industrialized production of the present invention.
The field simultaneous test has been carried out in anti-drought slow-release compound fertilizer, common compound fertilizer, peasant habit fertilising, and test-results is as shown in the table:
Table 1. anti-drought slow-release compound fertilizer is to the influence of summer corn output
Test-results shows that the fertile corn of handling of anti-drought slow-release corn compound is the highest in grain number per spike, 100-grain weight, output and dry-matter accumulation amount, and fertile processing of corn compound taken second place, and habits fertilization is handled minimum.
Table 2. anti-drought slow-release compound fertilizer is to the influence of cotton plants proterties
Test-results shows that anti-drought slow-release compound fertilizer is handled than the fertile plant height of handling of compound and reduced, but has increased cotton fruit branch number, number of flowers or flower bell number simultaneously.
The biological yield of each organ of table 3. different fertilization in term of opening bolls cotton and ratio (g/ strain)
Test-results shows that anti-drought slow-release compound fertilizer is handled the fertile processing of more common compound Radix Gossypii, the reproductive organ dry weight increases to some extent, and the ratio of root/shoot ratio, reproductive organ/whole strain improves; Anti-drought slow-release compound fertilizer is compared with common compound fertilizer, has prolonged cotton to the nutrient absorbing utilization in the cotton growth later stage, has solved the rate of release of disposable basic fertilise and difference and the contradiction between the plant growth cycle nutrient demand.
Table 4. different fertilization is to the influence of output of cotton
The output of cotton test-results shows that anti-drought slow-release compound fertilizer is handled output and is higher than the fertile fertilizer treatment of common compound, volume increase 5.4%-13.7%.
Table 5. anti-drought slow-release compound fertilizer is to nitric nitrogen effect of accumulation (mg/kg) in the 0-40cm soil layer
Test-results shows that in bud stage, flowering and boll-setting period and the term of opening bolls of cotton, 0-20cm soil nitrate nitrogen content anti-drought slow-release compound fertilizer is handled and is higher than the fertile processing of common compound; In harvesting time, the former all is lower than the latter 0-20cm, 20-40cm soil nitrate nitrogen content.Anti-drought slow-release compound fertilizer helps improving the topsoil soils nitrate nitrogen content, keeps higher soil fertility and productivity, has reduced the loss of nitrogen to the deep layer leaching again simultaneously, has reduced the pollution of nitrogenous fertilizer to environment; In addition, anti-drought slow-release compound fertilizer is suitable for using watering the limited area of water condition, and its drought resisting composition can improve and regulate and control the ambient moisture condition, strengthens the drought-resistant ability of crop, promotes the volume increase of crop stable yields.
Embodiment
The explanation that following examples are detailed the present invention.
Compound fertilizer among the present invention is compound fertilizer specials such as winter wheat commercially available in the agriculture production, summer corn, cotton.
Employed among the present invention " multifunctional creep control-released agent " is the Chinese patent product, and the patent No. is: ZL200610012360.9; Employed among the present invention " efficient drought-resistant agent " is the new high-tech product of Shijiazhuang Jianyuan Starch Derivative Co., Ltd., and card number is: 13001A073530.All the other components of the present invention all can obtain by direct purchase on market.
In following embodiment of the present invention, unless otherwise indicated, all wt per-cent is 100% in the fertile weight of compound all.
Embodiment 1
The liquid manure of first embodiment of the invention is isolated each component that conservation layer comprised and is respectively with the weight ratio of compound fertilizer: pre-gelatinized starch 12.5%, hydroxyethylamyle 1.6%, Magnesium Stearate 0.65%, yellow starch gum 0.75%, borax 0.2%; Each component that slow release layer comprised and be respectively: multifunctional creep control-released agent 19.5%, wilkinite 5.5% with the weight ratio of compound fertilizer; Each component that the moisture regulating course is comprised and be respectively: efficient drought-resistant agent 17.9%, carboxymethyl cellulose 2.8%, poly-aspartic-acid 1.5%, kaolin 4.5%, talcum powder 0.9% with the weight ratio of compound fertilizer.Wherein, the particle diameter of multifunctional creep control-released agent, efficient drought-resistant agent, Magnesium Stearate, yellow starch gum, borax is less than 0.25mm; Efficient drought-resistant agent water-intake rate is more than 400 times, and particle diameter is less than 0.25mm; The particle diameter of pre-gelatinized starch, hydroxyethylamyle, carboxymethyl cellulose, poly-aspartic-acid is less than 0.15mm; Wilkinite, kaolin, talcous particle diameter are less than 0.05mm.
Its preparation process is as follows:
(1) bag is isolated conservation layer by liquid manure: with described liquid manure isolate each component, the compound fertilizer of conservation layer, the polyoxyethylene glycol aqueous solution of 5g/L carries out the physics mixing in proportion, wherein the weight ratio of the polyoxyethylene glycol aqueous solution and compound fertilizer is 8.35%, granulation in tablets press then;
(2) wrap by slow release layer: each component of described slow release layer, the compound fertilizer of step (1) preparation, the polyoxyethylene glycol aqueous solution of 5g/L are carried out the physics mixing in proportion, wherein the weight ratio of the polyoxyethylene glycol aqueous solution and compound fertilizer is 8.35%, granulation in tablets press then;
(3) wrap by the moisture regulating course: each component of described moisture regulating course, the compound fertilizer of step (2) preparation, the polyoxyethylene glycol aqueous solution of 5g/L are carried out the physics mixing in proportion, wherein the weight ratio of the polyoxyethylene glycol aqueous solution and compound fertilizer is 8.35%, granulation in tablets press then;
(4) the compound fertilizer with step (3) preparation takes out from tablets press, dries or dry moisture content less than 10% under 60 ℃ of conditions in dryer.
Wherein the molecular weight of polyoxyethylene glycol is 400-600.
Wherein tablets press is the cylinder tablets press, and its working speed is 55r/min, and the inclination angle is 2 °.
The best working conditions of present embodiment is: crop: wheat; The soil texture: sand; Irrigation conditions: broadcast preceding water, water before the winter, the water of turning green, grouting water.
Embodiment 2
The liquid manure of second embodiment of the invention is isolated each component that conservation layer comprised and is respectively with the weight ratio of compound fertilizer: pre-gelatinized starch 12.9%, hydroxyethylamyle 1.8%, Magnesium Stearate 0.69%, yellow starch gum 0.80%, borax 0.15%; Each component that slow release layer comprised and be respectively: multifunctional creep control-released agent 13%, wilkinite 12.2% with the weight ratio of compound fertilizer; Each component that the moisture regulating course is comprised and be respectively: efficient drought-resistant agent 14%, carboxymethyl cellulose 2.5%, poly-aspartic-acid 1.2%, kaolin 3.0%, talcum powder 1.2% with the weight ratio of compound fertilizer.Wherein, the particle diameter of multifunctional creep control-released agent, efficient drought-resistant agent, Magnesium Stearate, yellow starch gum, borax is less than 0.25mm; Efficient drought-resistant agent water-intake rate is more than 400 times, and particle diameter is less than 0.25mm; The particle diameter of pre-gelatinized starch, hydroxyethylamyle, carboxymethyl cellulose, poly-aspartic-acid is less than 0.15mm; Wilkinite, kaolin, talcous particle diameter are less than 0.05mm.
Its preparation process is identical with preparation process among first embodiment, and unique difference is that the weight ratio of the employed polyoxyethylene glycol aqueous solution and compound fertilizer is: 7.38%.
The best working conditions of present embodiment is: crop: wheat; The soil texture: loam; Irrigation conditions: water, the water of turning green, grouting water before the winter.
Embodiment 3
The liquid manure of third embodiment of the invention is isolated each component that conservation layer comprised and is respectively with the weight ratio of compound fertilizer: pre-gelatinized starch 12.2%, hydroxyethylamyle 1.5%, Magnesium Stearate 0.73%, yellow starch gum 0.85%, borax 0.25%; Each component that slow release layer comprised and be respectively: multifunctional creep control-released agent 9.6%, wilkinite 14.8% with the weight ratio of compound fertilizer; Each component that the moisture regulating course is comprised and be respectively: efficient drought-resistant agent 9.9%, carboxymethyl cellulose 3.4%, poly-aspartic-acid 0.8%, kaolin 2%, talcum powder 1.5% with the weight ratio of compound fertilizer.Wherein, the particle diameter of multifunctional creep control-released agent, efficient drought-resistant agent, Magnesium Stearate, yellow starch gum, borax is less than 0.25mm; Efficient drought-resistant agent water-intake rate is more than 400 times, and particle diameter is less than 0.25mm; The particle diameter of pre-gelatinized starch, hydroxyethylamyle, carboxymethyl cellulose, poly-aspartic-acid is less than 0.15mm; Wilkinite, kaolin, talcous particle diameter are less than 0.05mm.
Its preparation process is identical with preparation process among first embodiment, and unique difference is that the weight ratio of the employed polyoxyethylene glycol aqueous solution and compound fertilizer is: 6.05%.
The best working conditions of present embodiment is: wheat; The soil texture: clay loam; Irrigation conditions: water, the water of turning green, grouting water before the winter.
Embodiment 4
The liquid manure of fourth embodiment of the invention is isolated each component that conservation layer comprised and is respectively with the weight ratio of compound fertilizer: pre-gelatinized starch 12.2%, hydroxyethylamyle 1.6%, Magnesium Stearate 0.9%, yellow starch gum 0.94%, borax 0.18%; Each component that slow release layer comprised and be respectively: multifunctional creep control-released agent 13.1%, wilkinite 10.6% with the weight ratio of compound fertilizer; Each component that the moisture regulating course is comprised and be respectively: efficient drought-resistant agent 15%, carboxymethyl cellulose 3.4%, poly-aspartic-acid 1.0%, kaolin 2%, talcum powder 2.2% with the weight ratio of compound fertilizer.Wherein, the particle diameter of multifunctional creep control-released agent, efficient drought-resistant agent, Magnesium Stearate, yellow starch gum, borax is less than 0.25mm; Efficient drought-resistant agent water-intake rate is more than 400 times, and particle diameter is less than 0.25mm; The particle diameter of pre-gelatinized starch, hydroxyethylamyle, carboxymethyl cellulose, poly-aspartic-acid is less than 0.15mm; Wilkinite, kaolin, talcous particle diameter are less than 0.05mm.
Its preparation process is identical with preparation process among first embodiment, and unique difference is that the weight ratio of the employed polyoxyethylene glycol aqueous solution and compound fertilizer is: 7.79%.
The best working conditions of present embodiment is: crop: summer corn; The soil texture: loam.
Embodiment 5
The liquid manure of fifth embodiment of the invention is isolated each component that conservation layer comprised and is respectively with the weight ratio of compound fertilizer: pre-gelatinized starch 11.9%, hydroxyethylamyle 1.8%, Magnesium Stearate 0.85%, yellow starch gum 0.79%, borax 0.27%; Each component that slow release layer comprised and be respectively: multifunctional creep control-released agent 10%, wilkinite 14.2% with the weight ratio of compound fertilizer; Each component that the moisture regulating course is comprised and be respectively: efficient drought-resistant agent 11.5%, carboxymethyl cellulose 2.8%, poly-aspartic-acid 0.9%, kaolin 2.5%, talcum powder 2.0% with the weight ratio of compound fertilizer.Wherein, the particle diameter of multifunctional creep control-released agent, efficient drought-resistant agent, Magnesium Stearate, yellow starch gum, borax is less than 0.25mm; Efficient drought-resistant agent water-intake rate is more than 400 times, and particle diameter is less than 0.25mm; The particle diameter of pre-gelatinized starch, hydroxyethylamyle, carboxymethyl cellulose, poly-aspartic-acid is less than 0.15mm; Wilkinite, kaolin, talcous particle diameter are less than 0.05mm.
Its preparation process is identical with preparation process among first embodiment, and unique difference is that the weight ratio of the employed polyoxyethylene glycol aqueous solution and compound fertilizer is: 6.77%.
The best working conditions of present embodiment is: crop: summer corn; The soil texture: loam.
Embodiment 6
The liquid manure of sixth embodiment of the invention is isolated each component that conservation layer comprised and is respectively with the weight ratio of compound fertilizer: pre-gelatinized starch 10.9%, hydroxyethylamyle 1.6%, Magnesium Stearate 0.95%, yellow starch gum 0.85%, borax 0.25%; Each component that slow release layer comprised and be respectively: multifunctional creep control-released agent 9.6%, wilkinite 16.2% with the weight ratio of compound fertilizer; Each component that the moisture regulating course is comprised and be respectively: efficient drought-resistant agent 10%, carboxymethyl cellulose 2.2%, poly-aspartic-acid 0.65%, kaolin 1.5%, talcum powder 1.8% with the weight ratio of compound fertilizer.Wherein, the particle diameter of multifunctional creep control-released agent, efficient drought-resistant agent, Magnesium Stearate, yellow starch gum, borax is less than 0.25mm; Efficient drought-resistant agent water-intake rate is more than 400 times, and particle diameter is less than 0.25mm; The particle diameter of pre-gelatinized starch, hydroxyethylamyle, carboxymethyl cellulose, poly-aspartic-acid is less than 0.15mm; Wilkinite, kaolin, talcous particle diameter are less than 0.05mm.
Its preparation process is identical with preparation process among first embodiment, and unique difference is that the weight ratio of the employed polyoxyethylene glycol aqueous solution and compound fertilizer is: 6.86%.
The best working conditions of present embodiment is: crop: summer corn; The soil texture: clay loam.
Embodiment 7
The liquid manure of seventh embodiment of the invention is isolated each component that conservation layer comprised and is respectively with the weight ratio of compound fertilizer: pre-gelatinized starch 13.7%, hydroxyethylamyle 1.2%, Magnesium Stearate 0.87%, yellow starch gum 0.86%, borax 0.32%; Each component that slow release layer comprised and be respectively: multifunctional creep control-released agent 15.6%, wilkinite 9.4% with the weight ratio of compound fertilizer; Each component that the moisture regulating course is comprised and be respectively: efficient drought-resistant agent 16.2%, carboxymethyl cellulose 3.0%, poly-aspartic-acid 1.4%, kaolin 2.5%, talcum powder 2.2% with the weight ratio of compound fertilizer.Wherein, the particle diameter of multifunctional creep control-released agent, efficient drought-resistant agent, Magnesium Stearate, yellow starch gum, borax is less than 0.25mm; Efficient drought-resistant agent water-intake rate is more than 400 times, and particle diameter is less than 0.25mm; The particle diameter of pre-gelatinized starch, hydroxyethylamyle, carboxymethyl cellulose, poly-aspartic-acid is less than 0.15mm; Wilkinite, kaolin, talcous particle diameter are less than 0.05mm.
Its preparation process is identical with preparation process among first embodiment, and unique difference is that the weight ratio of the employed polyoxyethylene glycol aqueous solution and compound fertilizer is: 8.09%.
The best working conditions of present embodiment is: crop: cotton; The soil texture: sand; Irrigation conditions: bud stage waters 1 water, flowering and boll-setting period waters 1 water.
Embodiment 8
The liquid manure of first embodiment of the invention is isolated each component that conservation layer comprised and is respectively with the weight ratio of compound fertilizer: pre-gelatinized starch 11.5%, hydroxyethylamyle 1.9%, Magnesium Stearate 0.95%, yellow starch gum 0.65%, borax 0.55%; Each component that slow release layer comprised and be respectively: multifunctional creep control-released agent 12.4%, wilkinite 10.9% with the weight ratio of compound fertilizer; Each component that the moisture regulating course is comprised and be respectively: efficient drought-resistant agent 11.8%, carboxymethyl cellulose 2.8%, poly-aspartic-acid 0.95%, kaolin 2.0%, talcum powder 1.6% with the weight ratio of compound fertilizer.Wherein, the particle diameter of multifunctional creep control-released agent, efficient drought-resistant agent, Magnesium Stearate, yellow starch gum, borax is less than 0.25mm; Efficient drought-resistant agent water-intake rate is more than 400 times, and particle diameter is less than 0.25mm; The particle diameter of pre-gelatinized starch, hydroxyethylamyle, carboxymethyl cellulose, poly-aspartic-acid is less than 0.15mm; Wilkinite, kaolin, talcous particle diameter are less than 0.05mm.
Its preparation process is identical with preparation process among first embodiment, and unique difference is that the weight ratio of the employed polyoxyethylene glycol aqueous solution and compound fertilizer is: 6.78%.
The best working conditions of present embodiment is: crop: cotton; The soil texture: loam; Irrigation conditions: bud stage waters 1 water.
Embodiment 9
The liquid manure of ninth embodiment of the invention is isolated each component that conservation layer comprised and is respectively with the weight ratio of compound fertilizer: pre-gelatinized starch 10.8%, hydroxyethylamyle 1.2%, Magnesium Stearate 0.75%, yellow starch gum 0.59%, borax 0.45%; Each component that slow release layer comprised and be respectively: multifunctional creep control-released agent 8.2%, wilkinite 12.9% with the weight ratio of compound fertilizer; Each component that the moisture regulating course is comprised and be respectively: efficient drought-resistant agent 11.5%, carboxymethyl cellulose 2.2%, poly-aspartic-acid 0.65%, kaolin 1.5%, talcum powder 2.2% with the weight ratio of compound fertilizer.Wherein, the particle diameter of multifunctional creep control-released agent, efficient drought-resistant agent, Magnesium Stearate, yellow starch gum, borax is less than 0.25mm; Efficient drought-resistant agent water-intake rate is more than 400 times, particle diameter less than 0.25mm; The particle diameter of pre-gelatinized starch, hydroxyethylamyle, carboxymethyl cellulose, poly-aspartic-acid is less than 0.15mm; Wilkinite, kaolin, talcous particle diameter are less than 0.05mm.
Its preparation process is identical with preparation process among first embodiment, and unique difference is that the weight ratio of the employed polyoxyethylene glycol aqueous solution and compound fertilizer is: 6.88%.
The best working conditions of present embodiment is: cotton; The soil texture: clay loam; Irrigation conditions: do not have and irrigate.
Foregoing description only proposes as a kind of anti-drought slow-release compound fertilizer of the present invention and the enforceable technical scheme of preparation method, not as the single restricted condition to its technical scheme itself.
Claims (8)
1. anti-drought slow-release compound fertilizer, it is characterized in that: comprise that compound is fertile and from inside to outside compound fertilizer is wrapped three bag tegillums of quilt: liquid manure is isolated conservation layer, slow release layer and moisture regulating course, and liquid manure is isolated each component that conservation layer comprised and is respectively with the weight ratio of compound fertilizer: pre-gelatinized starch 3-10%, hydroxyethylamyle 1-2%, Magnesium Stearate 0.1-0.5%, yellow starch gum 0.4-2%, borax 0.1-0.8%; Each component that slow release layer comprised and be respectively: multifunctional creep control-released agent 10-15%, wilkinite 8-15% with the weight ratio of compound fertilizer; Each component that the moisture regulating course is comprised and be respectively: efficient drought-resistant agent 10-20%, carboxymethyl cellulose 2-4%, poly-aspartic-acid 0.1-2%, kaolin 2-6%, talcum powder 0.5-1% with the weight ratio of compound fertilizer.
2. a kind of anti-drought slow-release compound fertilizer according to claim 1 is characterized in that: the particle diameter of described multifunctional creep control-released agent, efficient drought-resistant agent, Magnesium Stearate, yellow starch gum, borax is less than 0.25mm.
3. a kind of anti-drought slow-release compound fertilizer according to claim 1 is characterized in that: described efficient drought-resistant agent water-intake rate is more than 400 times, and particle diameter is less than 0.25mm.
4. a kind of anti-drought slow-release compound fertilizer according to claim 1 is characterized in that: the particle diameter of described pre-gelatinized starch, hydroxyethylamyle, carboxymethyl cellulose, poly-aspartic-acid is less than 0.15mm.
5. a kind of anti-drought slow-release compound fertilizer according to claim 1 is characterized in that: described wilkinite, kaolin, talcous particle diameter are less than 0.05mm.
6. a method for preparing the described anti-drought slow-release compound fertilizer of claim 1 uses tablets press that compound fertilizer is wrapped quilt, it is characterized in that step is as follows:
(1) bag is isolated conservation layer by liquid manure: with described liquid manure isolate each component, the compound fertilizer of conservation layer, the polyoxyethylene glycol aqueous solution of 4-6g/L carries out the physics mixing in proportion, wherein the weight ratio of the polyoxyethylene glycol aqueous solution and compound fertilizer is 4-8.5%, granulation in tablets press then;
(2) wrap by slow release layer: each component of described slow release layer, the compound fertilizer of step (1) preparation, the polyoxyethylene glycol aqueous solution of 4-6g/L are carried out the physics mixing in proportion, wherein the weight ratio of the polyoxyethylene glycol aqueous solution and compound fertilizer is 4-8.5%, granulation in tablets press then;
(3) wrap by the moisture regulating course: each component of described moisture regulating course, the compound fertilizer of step (2) preparation, the polyoxyethylene glycol aqueous solution of 4-6g/L are carried out the physics mixing in proportion, wherein the weight ratio of the polyoxyethylene glycol aqueous solution and compound fertilizer is 4-8.5%, granulation in tablets press then;
(4) the compound fertilizer with step (3) preparation takes out from tablets press, dries or dry moisture content less than 10% under 55-65 ℃ of condition in dryer.
7. the method for preparing anti-drought slow-release compound fertilizer according to claim 6 is characterized in that: the molecular weight of described polyoxyethylene glycol is 400-600.
8. the method for preparing anti-drought slow-release compound fertilizer according to claim 6 is characterized in that: described tablets press is cylinder or granulating disc, and its working speed is 50-60r/min, and the inclination angle is 1.5-3.0 °.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102372524A (en) * | 2010-08-26 | 2012-03-14 | 郝才友 | Boric fertilizer and preparation method thereof |
| CN104150970A (en) * | 2014-07-15 | 2014-11-19 | 湖北富邦科技股份有限公司 | Disc granulation method of granular slow-release magnesium ammonium phosphate fertilizer |
| CN108821888A (en) * | 2018-08-28 | 2018-11-16 | 海南莲华生态文化股份有限公司 | A kind of compound fertilizer formula of water lily |
| CN112919960A (en) * | 2020-12-31 | 2021-06-08 | 河北省农林科学院农业资源环境研究所 | High-efficiency functional fertilizer for tomato in seedling stage and preparation process thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1810732A (en) * | 2006-01-23 | 2006-08-02 | 石家庄天源淀粉衍生物有限公司 | Multifunctional fertilizer and pesticide slow/controlled releasing agent and its prepn process |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1810732A (en) * | 2006-01-23 | 2006-08-02 | 石家庄天源淀粉衍生物有限公司 | Multifunctional fertilizer and pesticide slow/controlled releasing agent and its prepn process |
Non-Patent Citations (2)
| Title |
|---|
| 《华北农学报》 20091231 吴欢欢等 我国缓/控释肥料发展现状、趋势及对策 第263-267页 1-8 第24卷, * |
| 《武汉化工学院学报》 20030131 邹箐等 绿色环保缓释/控释肥料的研究现状与展望 第13-17页 1-8 第25卷, 第1期 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102372524A (en) * | 2010-08-26 | 2012-03-14 | 郝才友 | Boric fertilizer and preparation method thereof |
| CN102372524B (en) * | 2010-08-26 | 2013-05-22 | 郝才友 | Boric fertilizer and preparation method thereof |
| CN104150970A (en) * | 2014-07-15 | 2014-11-19 | 湖北富邦科技股份有限公司 | Disc granulation method of granular slow-release magnesium ammonium phosphate fertilizer |
| CN108821888A (en) * | 2018-08-28 | 2018-11-16 | 海南莲华生态文化股份有限公司 | A kind of compound fertilizer formula of water lily |
| CN112919960A (en) * | 2020-12-31 | 2021-06-08 | 河北省农林科学院农业资源环境研究所 | High-efficiency functional fertilizer for tomato in seedling stage and preparation process thereof |
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| CN101786927B (en) | 2012-08-08 |
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