CN115141060A - Coated controlled-release pesticide fertilizer, preparation method and application thereof - Google Patents
Coated controlled-release pesticide fertilizer, preparation method and application thereof Download PDFInfo
- Publication number
- CN115141060A CN115141060A CN202210903323.6A CN202210903323A CN115141060A CN 115141060 A CN115141060 A CN 115141060A CN 202210903323 A CN202210903323 A CN 202210903323A CN 115141060 A CN115141060 A CN 115141060A
- Authority
- CN
- China
- Prior art keywords
- fertilizer
- pesticide
- release
- coating material
- controlled
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/40—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting fertiliser dosage or release rate; for affecting solubility
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/60—Biocides or preservatives, e.g. disinfectants, pesticides or herbicides; Pest repellants or attractants
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Plant Pathology (AREA)
- Fertilizers (AREA)
Abstract
The invention relates to the technical field of pesticides and fertilizers, in particular to a coated controlled-release pesticide fertilizer, a preparation method and application thereof. The invention provides a coated controlled-release pesticide fertilizer which sequentially comprises a core fertilizer layer, a first coating layer, a pesticide layer and a second coating layer from inside to outside. According to the invention, the coated controlled-release pesticide fertilizer is divided into a four-layer structure of a core fertilizer layer, a first coating layer, a pesticide layer and a second coating layer, so that the pesticide and the fertilizer are separated and do not directly contact with each other, mutual reaction is avoided, the fertilizer effect and the pesticide effect are reduced, and the fertilizer effect and the pesticide effect of the pesticide fertilizer are further improved; secondly, the release rate of pesticide molecules is controlled by changing the thickness of the coating material of the second coating layer, the number of micropores of the coating layer in the controlled-release pesticide fertilizer is adjusted by combining adjustment of the using amount of the pore-forming agent, the release rate of the pesticide molecules is further controlled, accurate controlled release of the fertilizer and the pesticide is realized, the utilization rate of the fertilizer and the pesticide is improved, the using amount of the fertilizer and the pesticide is saved, and the fertilizer and pesticide dual-reduction and efficiency improvement is realized.
Description
Technical Field
The invention relates to the technical field of pesticides and fertilizers, in particular to a coated controlled-release pesticide fertilizer, a preparation method and application thereof.
Background
Pesticides and fertilizers are important substances for controlling plant diseases and insect pests and providing plant nutrition in plant cultivation. In order to better promote the growth of plants, control pests and diseases, and improve the quality and yield of plants, a large amount of pesticides and fertilizers are applied to agricultural fields. Although the use of a large amount of pesticides and fertilizers can promote the growth of plants to a certain extent, the pesticides and fertilizers are dependent on the pesticides and fertilizers for a long time in planting, so that the pesticides and fertilizers cause serious damage to the environment and soil in the production and use processes.
In order to better improve the utilization rate of pesticides and fertilizers and reduce the dosage of fertilizer and pesticide, more and more controlled-release fertilizers and controlled-release pesticides are applied. The controlled release technology can effectively solve the outstanding problems of high release speed of active ingredients of the fertilizer and the like, short lasting period, low utilization efficiency, environmental pollution and the like. The means for realizing the controlled release of the pesticide or the fertilizer comprise granulation, addition of dissolution-inhibiting substances, addition of decomposition inhibitors, coating technology and the like, and the coating technology is one of the technologies which are widely applied.
At present, a lot of patents relate to coating materials, controlled-release pesticides and controlled-release pesticide fertilizers, and a patent CN107556090 discloses a wheel coating and a production method of controlled-release granular pesticides or fertilizers thereof. Patent CN110194695 discloses a coating material, a coated controlled-release pesticide fertilizer and a preparation method thereof, wherein in the production process of pesticide fertilizer particles, pesticides and fertilizers are simply mixed for granulation, then coating is carried out, drying is carried out at 50-60 ℃, pesticide and fertilizers are directly contacted, chemical reaction is easy to generate, so that the pesticide effect is reduced, even the pesticide effect is invalid, the low-temperature drying time is long, the energy consumption is large, the pesticide is degraded, and the like. Patent CN104447026 discloses a vegetable oil coated controlled release fertilizer with adjustable nutrient release rate and a preparation method thereof, and although it discloses that a double-film coated controlled release fertilizer can be prepared by using two materials of pure vegetable oil polyol and a curing agent (polyisocyanate) as framework substances, and the nutrient release rate in the fertilizer can be adjusted, the main technical problem to be solved is to adjust and control the nutrient release period of the coated controlled release fertilizer by selecting a proper coating material and adjusting the coating preparation process. That is, although there are many technologies for controlling release of pesticide or fertilizer, the controlled release fertilizer which can really guarantee the effect of pesticide and fertilizer has a larger research space, so that it is important to provide a controlled release fertilizer which can separate pesticide and fertilizer and avoid mutual reaction to reduce fertilizer efficiency and pesticide effect.
Disclosure of Invention
Based on the technical problems, the invention aims to provide a coated controlled-release pesticide fertilizer, a preparation method and application thereof. The four-layer controlled-release pesticide fertilizer comprises a core fertilizer layer, a first coating layer, a pesticide layer and a second coating layer, and can separate pesticide and fertilizer without direct contact, so that the fertilizer efficiency and the pesticide effect of the pesticide fertilizer are improved.
In order to achieve the above purpose, the invention provides the following technical scheme:
the invention provides a coated controlled-release pesticide fertilizer which sequentially comprises a core fertilizer layer, a first coating layer, an insecticide layer and a second coating layer from inside to outside.
Preferably, the fertilizer comprises, by mass, 0.05% -3.0% of pesticide, 30% -84% of fertilizer, 0.1% -3% of fertilizer slow-release agent, 0.05% -3% of auxiliary agent, 0.6% -2.6% of coating material and the balance of filler.
Preferably, the coating material comprises a first coating material and a second coating material in parts by mass;
the first coating material comprises 75-95 parts of plant polyol, 4-15 parts of film-forming additive, 0.1-5 parts of pore-foaming agent and 0.2-2.0 parts of catalyst;
the second coating material comprises polyisocyanate.
Preferably, the mass ratio of the first coating material to the second coating material is 1: (0.4-1.0).
Preferably, the effective components in the fertilizer comprise N and P 2 O 5 、K 2 O, mg, silicon and organic matter.
Preferably, the pesticide comprises one or two of chlorantraniliprole, cyantraniliprole, monosultap, imidacloprid, thiamethoxam, clothianidin, dinotefuran, pyraclostrobin, azoxystrobin, kresoxim-methyl, difenoconazole and oxadixyl.
Preferably, the vegetable polyol comprises one or more of castor oil polyol, flax oil polyol, sesame oil polyol, rapeseed oil polyol, soybean oil polyol, palm oil polyol, tea seed oil polyol and tung oil polyol.
The invention provides a preparation method of the controlled-release pesticide fertilizer, which comprises the following preparation steps:
mixing and granulating a fertilizer, a fertilizer slow-release agent, an auxiliary agent and a filler to obtain a core fertilizer layer;
preheating the core fertilizer layer to 60-70 ℃, uniformly spraying a coating material on the surface of the preheated core fertilizer layer, and carrying out in-situ polymerization on the surface of the core fertilizer layer to form a first coating layer so as to obtain a coated controlled-release fertilizer;
spraying pesticide on the surface of the coated controlled-release fertilizer to obtain a controlled-release pesticide fertilizer;
spraying the coating material on the surface of the controlled-release pesticide fertilizer for the first time to generate in-situ polymerization; and spraying the coating material for the second time to perform in-situ polymerization to obtain the coated controlled-release pesticide fertilizer.
Preferably, the mass ratio of the coating material used in the coated controlled-release fertilizer preparation stage to the coating material used in the coated controlled-release pesticide fertilizer preparation stage is (3-5): (5-7);
in the stage of preparing the coated controlled-release pesticide fertilizer, the mass ratio of the coating materials used in the first spraying and the second spraying is (3-5): (5-7).
The invention also provides the application of the coated controlled-release pesticide fertilizer in promoting the growth of plants;
the plants include sugarcane, corn, banana, sweet potato and rice.
Has the advantages that:
the invention provides a coated controlled-release pesticide fertilizer which sequentially comprises a core fertilizer layer, a first coating layer, an insecticide layer and a second coating layer from inside to outside.
According to the invention, the coated controlled-release pesticide fertilizer is divided into a four-layer structure of a core fertilizer layer, a first coating layer, a pesticide layer and a second coating layer, so that the pesticide and the fertilizer are separated and do not directly contact with each other, mutual reaction is avoided, the fertilizer effect and the pesticide effect are reduced, and the fertilizer effect and the pesticide effect of the pesticide fertilizer are further improved;
secondly, the release rate of pesticide molecules is controlled by changing the thickness of the coating material of the second coating layer, the quantity and the type of pore-forming agents are adjusted in a combined manner, so that the quantity and the size of micropores of the coating layer in the controlled-release pesticide fertilizer are adjusted, the release rate of the pesticide molecules is further controlled, the precise controlled release of the fertilizer and the pesticide is realized, the utilization rate of the fertilizer and the pesticide is improved, the use quantity of the fertilizer and the pesticide is saved, and the fertilizer and pesticide dual-reduction and synergism are realized.
In addition, the pesticide fertilizer particles in the invention do not need to be dried, so that the energy consumption is saved, and the problem of pesticide degradation in the drying process is avoided.
Furthermore, the release rates of N and K in the fertilizer are controlled through the first and second vegetable oil-coated layers and the fertilizer slow-release agent, so that the effect of double controlled release of nutrients and pesticide active ingredients is achieved.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below.
Fig. 1 is a structural diagram of the coated controlled-release fertilizer according to the present invention.
Detailed Description
The invention provides a coated controlled-release pesticide fertilizer which sequentially comprises a core fertilizer layer, a first coating layer, a pesticide layer and a second coating layer from inside to outside.
In the invention, the coated controlled-release pesticide fertilizer is preferably of a core-shell structure and sequentially comprises a core fertilizer layer, a first coating layer, a pesticide layer and a second coating layer from inside to outside. The coated controlled-release pesticide fertilizer has a four-layer structure, wherein the fertilizer layer is taken as a core, so that the coated controlled-release pesticide fertilizer is beneficial to preparing a pesticide fertilizer with a four-layer structure later, and the coated controlled-release pesticide fertilizer is more suitable for being taken as the core due to larger fertilizer occupation ratio. Meanwhile, the fertilizer and the pesticide are respectively made into two layers, and a coating material layer is added between the pesticide layer and the fertilizer layer to separate the pesticide from the fertilizer; further, the pesticide layer is coated on the surface of the controlled-release pesticide fertilizer, so that the effective components of the pesticide are released outwards through the film material, and the peripheral coating process is facilitated due to the fact that the effective components of the pesticide are less.
In the invention, the coated controlled-release pesticide fertilizer preferably comprises 0.05-3.0% of pesticide, 30-84% of fertilizer, 0.1-3% of fertilizer slow-release agent, 0.05-3.0% of auxiliary agent, 0.6-2.6% of coating material and the balance of filler by mass percentage.
The pesticide composition preferably comprises 0.05-3.0% of pesticide by mass percentage, more preferably 0.1-2.5%, further preferably 0.12-2.0%, further preferably 0.14-1.5%, and most preferably 0.16-1.2%. The pesticide provided by the invention preferably comprises one or two of chlorantraniliprole, cyantraniliprole, monosultap, imidacloprid, thiamethoxam, clothianidin, dinotefuran, pyraclostrobin, azoxystrobin, kresoxim-methyl, difenoconazole and oxadixyl, more preferably any two of the above pesticides in combination, and further preferably comprises chlorantraniliprole and thiamethoxam, chlorantraniliprole and clothianidin or chlorantraniliprole and pyraclostrobin. In the present invention, when the pesticide preferably includes two kinds of pesticides, the mass ratio of the two kinds of pesticides is preferably (1 to 4): (1-4), specifically, when the two pesticides are chlorantraniliprole and thiamethoxam, the mass ratio of the chlorantraniliprole to the thiamethoxam is preferably 1:3.
the fertilizer of the invention preferably comprises 30-84% of fertilizer by mass percentage, and more preferably 35-80%. In the invention, the effective components in the fertilizer preferably comprise N and P 2 O 5 、K 2 O, mg, silicon and organic matter; the N and P 2 O 5 、K 2 The mass ratio of O, mg, silicon and organic matter is preferably (10-30): (5-20): (15-30): (0.2-5): (0.01-0.3): (20 to 40), more preferably 15:10:15:0.5:0.05:30. in the invention, the N and the P are 2 O 5 And K 2 O is preferably from a compound fertilizer or a mixed fertilizer; the mixed fertilizer comprises a compound fertilizer, a nitrogenous fertilizer, a phosphate fertilizer and a potash fertilizer; or, the N, P 2 O 5 And K 2 O is preferably derived from a nitrogen fertilizer, a phosphate fertilizer and a potassium fertilizer, respectively. In the present invention, the nitrogen fertilizer preferably comprises one or more of urea, ammonium chloride, ammonium sulfate and ammonium bicarbonate, more preferably comprises urea and diammonium phosphate. The phosphate fertilizer of the invention preferably comprises one or two of calcium superphosphate and calcium magnesium phosphate, and more preferably comprises diammonium phosphate. The potash fertilizer is preferably one or two of potassium sulfate and potassium chloride, and more preferably potassium chloride. The compound fertilizer is preferably one or more of monoammonium phosphate, diammonium phosphate, urea ammonium phosphate, ammonium phosphate nitrate, ammonium phosphate, nitrophosphate fertilizer, potassium nitrate and monopotassium phosphate, and more preferably one or two. The organic matter is preferably one or more of sheep manure, pig manure, cow manure, horse manure, chicken manure, duck manure, goose manure, crop straw, bagasse and filter mud, and more preferably one; the sheep manure, the pig manure, the cow manure, the horse manure, the chicken manure, the duck manure, the goose manure, the crop straw, the bagasse and the filter mud are preferably fermented and matured. The Mg in the invention is preferably derived from magnesium sulfate heptahydrate or anhydrous magnesium sulfate. The silicon of the present invention is preferably derived from sodium silicate.
The fertilizer slow-release agent is preferably contained in an amount of 0.1-3 wt%, more preferably 0.1-2.5 wt%, even more preferably 0.1-2.0 wt%, even more preferably 0.1-1.0 wt%, and most preferably 0.1-0.8 wt%. The fertilizer slow-release agent of the invention preferably comprises one or more of oxalic acid, dicyandiamide, humic acid powder, hydroquinone, zeolite powder, rooting powder and guanyl thiourea, more preferably comprises one or two, even more preferably comprises one, and particularly preferably comprises oxalic acid.
The invention preferably comprises 0.05-3.0% of the auxiliary agent, more preferably 0.1-2.5%, further preferably 0.2-2.0%, further preferably 0.3-1.8%, and most preferably 0.5-1.5% by mass. The auxiliary agent preferably comprises one of sodium carboxymethylcellulose, alkyl naphthalene sulfonate, sodium dodecyl sulfate, dioctyl sodium sulfosuccinate, sodium methylene dinaphthalene sulfonate and alkylphenol polyoxyethylene formaldehyde condensate sulfate, and more preferably comprises sodium carboxymethylcellulose.
The coating material of the present invention preferably comprises 0.6 to 2.6% by mass, more preferably 0.7 to 2.3%, even more preferably 0.9 to 2.2%, even more preferably 0.8 to 2.0%, and most preferably 1.0 to 1.6%.
In the present invention, the balance is preferably a filler. The filler of the present invention preferably includes one or more of white carbon black, kaolin, bentonite, attapulgite, diatomaceous earth, and composite powder, more preferably includes one or two, even more preferably includes one, and particularly preferably includes kaolin.
In the present invention, the coating material preferably includes a first coating material and a second coating material; the mass ratio of the first coating material to the second coating material is 1: (0.4 to 1.0), more preferably 1:0.5 to 0.8, more preferably 1:0.5 to 0.7, most preferably 1:0.5 to 0.6. The second coating material of the present invention preferably comprises polyisocyanate; the polyisocyanate preferably comprises one or more of toluene diisocyanate TDI, diphenylmethane diisocyanate MDI and polymethylene polyphenyl polyisocyanate PAPI, more preferably comprises one or two, most preferably comprises two; specifically, polymethylene polyphenyl polyisocyanate and diphenylmethane diisocyanate are preferable; when the polyisocyanate includes polymethylene polyphenyl polyisocyanate and diphenylmethane diisocyanate, the mass ratio of the polymethylene polyphenyl polyisocyanate to the diphenylmethane diisocyanate is preferably (1 to 3): (1 to 3), more preferably 6:4. the thickness of the second coating material is preferably 0.1-0.5 mm. In the invention, the first coating material preferably comprises 75-95 parts by mass of plant polyol, 4-15 parts by mass of film forming auxiliary agent, 0.1-5 parts by mass of pore-forming agent and 0.2-2.0 parts by mass of catalyst.
The first coating material of the present invention preferably includes 75 to 95 parts by mass of plant polyol, more preferably 80 to 90 parts by mass, and even more preferably 83 to 88 parts by mass. In the present invention, the plant polyol preferably includes one or more of castor oil polyol, linseed oil polyol, sesame oil polyol, rapeseed oil polyol, soybean oil polyol, palm oil polyol, tea seed oil polyol and tung oil polyol, more preferably includes one or two, and further may preferably be castor oil polyol and palm oil polyol, or castor oil polyol and soybean oil polyol, or linseed oil polyol and tea seed oil polyol. In the present invention, when the vegetable polyol includes a castor oil polyol and a palm oil polyol, the mass ratio of the castor oil polyol to the palm oil polyol is preferably (1 to 3): (1 to 3), more preferably 52.8:35.2.
the first coating material of the present invention preferably comprises 4 to 15 parts of the film-forming assistant, more preferably 5 to 12 parts, even more preferably 7 to 10 parts, and most preferably 8 to 9 parts, based on the mass parts of the plant polyol. The film forming aid of the present invention preferably comprises one or more of paraffin wax, microcrystalline wax, chlorinated paraffin wax, petroleum resin, alpha-olefin, polyethylene wax, EVA wax, asphalt, and silicone wax, more preferably comprises one or two, and even more preferably comprises any one of the above film forming aids.
Based on the mass parts of the plant polyol, the first coating material preferably comprises 0.1-5 parts of a pore-foaming agent, more preferably comprises 0.5-4.5 parts, further preferably comprises 1-4 parts, and more preferably comprises 1.5-3.5 parts. The pore-forming agent preferably comprises one or more of sodium carbonate, sodium sulfate, potassium carbonate, dipotassium hydrogen phosphate, monopotassium phosphate, potassium sulfate, potassium nitrate, calcium carbonate, magnesium carbonate and calcium phosphate, and more preferably comprises any one or two of the pore-forming agents. The number of the micropores on 0.1-5 parts of pore-foaming agent is preferably 1 × 10 5 ～1×10 8 。
The first coating material of the present invention preferably comprises 0.2 to 2.0 parts by weight of the catalyst, more preferably 0.5 to 1.5 parts by weight, even more preferably 0.8 to 1.3 parts by weight, and most preferably 0.9 to 1.1 parts by weight, based on the mass parts of the plant polyol. The catalyst of the present invention preferably comprises one or more of dibutyltin dilaurate, stannous octoate, dibutyltin diacetate, dimethyltin dichloride, dialkyltin dithiolate, monobutyltin oxide, dibutyltin oxide, dimethylcyclohexylamine, dimethylhexadecylamine, triethylenediamine, dimethylethanolamine, triethanolamine, tetramethyliminodipropylamine, bismuth carboxylate, bismuth isooctanoate, bismuth neodecanoate, bismuth laurate, bismuth naphthenate, zinc isooctanoate, zinc neodecanoate, potassium isooctanoate, potassium acetate and potassium oleate, and more preferably comprises any one or two of the above catalysts.
In the present invention, the preparation method of the coating material preferably includes the following preparation steps: mixing and heating plant polyol, a film-forming assistant and a catalyst, and stirring to obtain a first mixture;
mixing, blending and polymerizing the first mixture and a pore-foaming agent to obtain a first coating material; and heating and dissolving the polyisocyanate to obtain a second coating material.
In the present invention, the heating temperature for preparing the first mixture is preferably 50 to 70 ℃, more preferably 55 to 65 ℃, further preferably 58 to 63 ℃, and most preferably 60 to 62 ℃; the stirring time is preferably 20 to 30min. More preferably 28 to 30min. The temperature of the blending polymerization of the first mixture and the pore-foaming agent is preferably 50-70 ℃, more preferably 55-65 ℃, and further preferably 60-63 ℃; the time for the blending polymerization is preferably 30 to 50min, more preferably 30 to 45min, and still more preferably 30 to 40min.
In the present invention, the polyisocyanate is dissolved at a temperature of preferably 50 to 70 ℃, more preferably 55 to 65 ℃, and still more preferably 60 to 63 ℃. In the present invention, the time for heating and dissolving the polyisocyanate is not particularly limited, and the polyisocyanate may be sufficiently dissolved. In the present invention, the second coating material is preferably a coating curing agent.
The invention provides a preparation method of the controlled-release pesticide fertilizer, which comprises the following preparation steps:
mixing and granulating a fertilizer, a fertilizer slow-release agent, an auxiliary agent and a filler to obtain a core fertilizer layer;
preheating the core fertilizer layer to 60-70 ℃, spraying a coating material on the surface of the preheated core fertilizer layer, and polymerizing in situ on the surface of the core fertilizer layer to form a first coating layer to obtain a coated controlled-release fertilizer;
spraying pesticide on the surface of the coated controlled-release fertilizer to obtain a controlled-release pesticide fertilizer;
spraying the coating material on the surface of the controlled-release pesticide fertilizer for the first time to generate in-situ polymerization; and spraying the coating material for the second time to perform in-situ polymerization to obtain the coated controlled-release pesticide fertilizer.
According to the invention, the fertilizer slow-release agent, the auxiliary agent and the filler are preferably mixed and crushed, the water content is adjusted, and granulation is carried out to obtain the core fertilizer layer. The particle size of the pulverized material of the present invention is preferably 50 to 200 mesh, and more preferably 100 mesh. The water content is preferably 16% to 25%, more preferably 20%. The method for adjusting the water content is not particularly limited in the present invention, and the conventional adjusting method in the art can be adopted. The invention preferably adopts a three-in-one granulator to prepare the core fertilizer layer, and the model and the source of the three-in-one granulator are not particularly limited and can be prepared by adopting conventional commercial products in the field. The invention preferably dries after granulation, the inlet air temperature for drying is preferably 200 ℃, and the outlet air temperature is preferably 60-70 ℃.
After the core fertilizer layer is obtained after drying (the temperature is 60-70 ℃), the coating material is uniformly sprayed on the surface of the preheated core fertilizer layer without cooling or preheating, and a first coating layer is formed on the surface of the core fertilizer layer through in-situ polymerization, so that the coated controlled release fertilizer is obtained. The preheating temperature of the invention is preferably 60-70 ℃. The time for the in-situ polymerization in the present invention is preferably 5 to 10min, more preferably 6 to 8min. The invention preferably carries out the film coating in a hemispherical disc film coating machine, and the invention has no special limitation on the model and the source of the hemispherical disc film coating machine and can adopt the conventional commercial products in the field.
After the coated controlled-release fertilizer is obtained, pesticide is sprayed on the surface of the coated controlled-release fertilizer to obtain the controlled-release pesticide fertilizer. The pesticide of the invention is preferably pesticide raw powder. The grain size of the pesticide raw medicinal powder is preferably larger than 200 meshes. The spraying mode of the pesticide is not particularly limited, and the pesticide is uniformly sprayed on the surface of the controlled release fertilizer.
After the controlled-release pesticide fertilizer is obtained, the coating material is sprayed on the surface of the controlled-release pesticide fertilizer for the first time to generate in-situ polymerization; and spraying the coating material for the second time to perform in-situ polymerization to obtain the coated controlled-release pesticide fertilizer. In the invention, the mass ratio of the coating material used in the stage of preparing the coated controlled-release fertilizer to the coating material used in the stage of preparing the coated controlled-release pesticide fertilizer is (3-5): (5 to 7), more preferably 4:6. in the stage of preparing the coated controlled-release pesticide fertilizer, the mass ratio of the coating materials used in the first spraying and the second spraying is (3-5): (5 to 7), more preferably 4:6. the in-situ polymerization time of the first spraying of the invention is preferably 5 to 10min, more preferably 6 to 8min. The in-situ polymerization time of the second spraying is preferably 5 to 10min, and more preferably 6 to 8min. The coating mode of twice feeding has the function that the coating material can be coated on the surface of the controlled-release pesticide fertilizer more uniformly and comprehensively. The coated controlled-release pesticide fertilizer prepared by the invention comprises four layers, and sequentially comprises a core fertilizer layer, a first coating layer, a pesticide layer and a second coating layer from inside to outside, wherein the core fertilizer layer, the plant oil coating layer, the pesticide layer and the plant oil coating layer respectively correspond to the core part fertilizer layer, the plant oil coating layer, the pesticide layer and the plant oil coating layer in the figure 1.
The invention also provides the application of the coated controlled-release pesticide fertilizer in improving the pest control effect and promoting the growth of plants; the plant of the present invention includes sugarcane, corn, banana, sweet potato or rice, preferably sugarcane or corn, and more preferably sugarcane. The optimization for improving the pest control effect and promoting the plant growth comprises the steps of improving the pest control effect, promoting the germination and tillering of plants, improving the plant height, the stem diameter and the acre effective stem of the plants and increasing the yield.
In order to further illustrate the present invention, the following embodiments are described in detail, but they should not be construed as limiting the scope of the present invention.
Example 1
0.16% chlorantraniliprole and thiamethoxam controlled release pesticide fertilizer (N-P) 2 O 5 -K 2 O＝15-10-15)
The vegetable oil coated controlled-release pesticide-fertilizer structure sequentially comprises a core fertilizer layer, a vegetable oil coating layer, an insecticide layer and a vegetable oil coating layer from inside to outside; the composition comprises the following components in percentage by weight:
insecticide: 0.04% of chlorantraniliprole and 0.12% of thiamethoxam;
the fertilizer comprises the following effective components: n content 15% (urea and diammonium phosphate), P 2 O 5 Content 10% (diammonium phosphate), K 2 15 percent of O (potassium chloride), 30 percent of organic matter (pig manure) fertilizer, 0.5 percent of magnesium and 0.05 percent of silicon;
coating materials: 0.6% (wherein the content of the first coating material is 0.4%, the castor oil polyol accounts for 52.8% of the first coating material, the palm oil polyol accounts for 35.2% of the first coating material, the film-forming assistant accounts for 8% of the first coating material, the catalyst accounts for 1% of the first coating material, and the pore-forming agent accounts for 3% of the first coating material, the content of the second coating material is 0.2%, the polymethylene polyphenyl polyisocyanate accounts for 60% of the second coating material, and the diphenylmethane diisocyanate accounts for 40% of the second coating material);
fertilizer slow release agent: oxalic acid, content 0.1%;
auxiliary agent: sodium carboxymethylcellulose with a content of 0.5%;
the balance of filler: kaolin, to make up to 100%.
The preparation method of the plant oil film controlled-release pesticide fertilizer comprises the following steps:
the castor oil polyol, the palm oil polyol, the film-forming additive paraffin and the catalyst potassium acetate are weighed and mixed, heated at the temperature of 62 ℃, and stirred to react for 30min to obtain a first mixture;
adding a pore-foaming agent sodium carbonate into the first mixture, carrying out blending polymerization at 62 ℃, and obtaining a first coating material after 30 min;
weighing a curing agent polymethylene polyphenyl polyisocyanate and diphenylmethane diisocyanate, uniformly mixing, and heating at 62 ℃ to fully dissolve to obtain a second coating material;
metering urea, diammonium phosphate, potassium chloride, fermented and decomposed pig manure, magnesium sulfate, sodium silicate, a fertilizer slow-release agent oxalic acid, an auxiliary agent sodium carboxymethyl cellulose and a filler kaolin, mixing and crushing the mixture, adjusting the water content to 20%, adding the mixture into centrifugal extrusion and rounding three-in-one granulation equipment for granulation, and conveying the mixture into a dryer (the air inlet temperature is 200 ℃ and the air outlet temperature is 60-70 ℃) for drying to prepare a core forming fertilizer layer;
and (3) conveying the prepared core granular fertilizer (60-70 ℃) to a hemispherical disc coating machine, uniformly spraying 35% of first coating material and 35% of cured second coating material on the surface of the core fertilizer layer at the same time, and performing in-situ polymerization (the time is 8 min) to react and form a film to obtain the coated controlled-release fertilizer.
Uniformly spraying a layer of pesticide raw powder on the surface of the prepared coated controlled-release fertilizer, simultaneously and uniformly spraying 39% of first coating material and 39% of solidified second coating material on the surface of a pesticide layer, carrying out in-situ polymerization (polymerization time is 7 min), simultaneously and uniformly spraying 26% of first coating material and 26% of solidified second coating material on the surface of the pesticide layer, and carrying out in-situ polymerization (polymerization time is 7 min) again to react and form a film, thus obtaining the plant film-coated controlled-release fertilizer capable of adjusting the release rate of nutrients and pesticide active ingredients.
Example 2
0.16% chlorantraniliprole and thiamethoxam controlled release pesticide fertilizer (N-P) 2 O 5 -K 2 O＝15-10-15)
The structure and the preparation method of the coated controlled-release pesticide fertilizer in the embodiment 2 are the same as those in the embodiment 1, and the content of the coating material is different in composition; specifically, the composition comprises the following components in percentage by weight:
insecticide: 0.04% of chlorantraniliprole and 0.12% of thiamethoxam;
the fertilizer comprises the following effective components: n content 15% (urea and diammonium phosphate), P 2 O 5 Content of 10% (diammonium phosphate), K 2 15 percent of O (potassium chloride), 30 percent of organic matter (pig manure) fertilizer, 0.5 percent of magnesium and 0.05 percent of silicon;
coating materials: 1.1% (wherein the content of the first coating material is 0.73%, the castor oil polyol accounts for 52.8% of the first coating material, the palm oil polyol accounts for 35.2% of the first coating material, the film-forming assistant accounts for 8% of the first coating material, the catalyst accounts for 1% of the first coating material, and the pore-forming agent accounts for 3% of the first coating material, the content of the second coating material is 0.37%, the polymethylene polyphenyl polyisocyanate accounts for 60% of the second coating material, and the diphenylmethane diisocyanate accounts for 40% of the second coating material);
fertilizer slow release agent: oxalic acid, content 0.1%;
auxiliary agent: sodium carboxymethylcellulose with a content of 0.5%;
the balance of filler: kaolin, to make up to 100%.
Example 3
0.16% chlorantraniliprole and thiamethoxam controlled release pesticide fertilizer (N-P) 2 O 5 -K 2 O＝15-10-15)
The structure and the preparation method of the vegetable oil coated controlled release fertilizer of the embodiment 3 are the same as those of the embodiment 2, and in the composition, a pore-forming agent is lacked, and the balance of the pore-forming agent is supplemented by vegetable polyol; specifically, the composition comprises the following components in percentage by weight:
insecticide: 0.04% of chlorantraniliprole and 0.12% of thiamethoxam;
the fertilizer comprises the following effective components: n content 15% (urea and diammonium phosphate), P 2 O 5 Content 10% (diammonium phosphate), K 2 15 percent of O (potassium chloride), 30 percent of organic matter (pig manure) fertilizer, 0.5 percent of magnesium and 0.05 percent of silicon;
coating materials: 1.6% (wherein the content of the first coating material is 1.07%, the castor oil polyol accounts for 54.5% of the first coating material, the palm oil polyol accounts for 36.4% of the first coating material, the film-forming assistant accounts for 8% of the first coating material, the catalyst accounts for 1% of the first coating material, and the pore-forming agent accounts for 0.1% of the first coating material;
the content of the second wrapping film material is 0.53 percent, and the second wrapping film material comprises polymethylene polyphenyl polyisocyanate accounting for 60 percent of the second wrapping film material and diphenylmethane diisocyanate accounting for 40 percent of the second wrapping film material);
fertilizer slow release agent: oxalic acid, content 0.1%;
auxiliary agent: sodium carboxymethylcellulose with a content of 0.5%;
the balance of filler: kaolin, to make up to 100%.
Example 4
0.16% chlorantraniliprole and thiamethoxam controlled release pesticide fertilizer (N-P) 2 O 5 -K 2 O＝15-10-15)
The structure and the preparation method of the vegetable oil coated controlled-release pesticide fertilizer in the embodiment 4 are the same as those in the embodiment 3, in the composition, the pore-forming agent accounts for 1.5 percent of the total amount of the first coating material, and the balance of the pore-forming agent is supplemented by vegetable oil polyalcohol; specifically, the composition comprises the following components in percentage by weight:
insecticide: 0.04% of chlorantraniliprole and 0.12% of thiamethoxam;
the fertilizer comprises the following effective components: n content 15% (urea and diammonium phosphate), P 2 O 5 Content 10% (diammonium phosphate), K 2 15 percent of O (potassium chloride), 30 percent of organic matter (pig manure) fertilizer, 0.5 percent of magnesium and 0.05 percent of silicon;
coating materials: 1.6% (wherein the content of the first coating material is 1.07%, the castor oil polyol accounts for 53.7% of the first coating material, the palm oil polyol accounts for 35.8% of the first coating material, the film-forming assistant accounts for 8% of the first coating material, the catalyst accounts for 1% of the first coating material, the pore-forming agent accounts for 1.5% of the first coating material, the content of the second coating material is 0.53%, the polymethylene polyphenyl polyisocyanate accounts for 60% of the second coating material, and the diphenylmethane diisocyanate accounts for 40% of the second coating material);
fertilizer slow release agent: oxalic acid, content 0.1%;
auxiliary agent: sodium carboxymethylcellulose with a content of 0.5%;
the balance of filler: kaolin, to make up to 100%.
Example 5
0.16% chlorantraniliprole and thiamethoxam controlled release pesticide fertilizer (N-P) 2 O 5 -K 2 O＝15-10-15)
The structure and the preparation method of the vegetable oil coated controlled-release fertilizer are the same as those of the embodiment 1, and the composition is different from that of the coated material; specifically, the composition comprises the following components in percentage by weight:
insecticide: 0.04% of chlorantraniliprole and 0.12% of thiamethoxam;
the fertilizer comprises the following effective components: n content 15% (urea and diammonium phosphate), P 2 O 5 Content of 10% (diammonium phosphate), K 2 15 percent of O (potassium chloride), 30 percent of organic matter (pig manure) fertilizer, 0.5 percent of magnesium and 0.05 percent of silicon;
coating materials: 1.6 percent (wherein the content of the first coating material is 1.07 percent, the castor oil polyol accounts for 52.8 percent of the first coating material, the palm oil polyol accounts for 35.2 percent of the first coating material, the film-forming assistant accounts for 8 percent of the first coating material, the catalyst accounts for 1 percent of the first coating material, and the pore-forming agent accounts for 3 percent of the first coating material), the content of the second coating material is 0.53 percent, the polymethylene polyphenyl polyisocyanate accounts for 60 percent of the second coating material, and the diphenylmethane diisocyanate accounts for 40 percent of the second coating material);
fertilizer slow release agent: oxalic acid, content 0.1%;
auxiliary agent: sodium carboxymethylcellulose with a content of 0.5%;
the balance of filler: kaolin, to make up to 100%.
Example 6
0.16% chlorantraniliprole and thiamethoxam controlled release pesticide fertilizer (N-P) 2 O 5 -K 2 O＝15-10-15)
The structure and the preparation method of the coated controlled-release pesticide fertilizer in the embodiment 6 are the same as those in the embodiment 3, in the composition, the pore-forming agent accounts for 4.5 percent of the first coating material, and the excessive components of the pore-forming agent are deducted from the vegetable oil polyalcohol; specifically, the composition comprises the following components in percentage by weight:
insecticide: 0.04% of chlorantraniliprole and 0.12% of thiamethoxam;
the fertilizer comprises the following effective components: n content 15% (urea and diammonium phosphate), P 2 O 5 Content 10% (diammonium phosphate), K 2 15% of O (potassium chloride), 30% of organic matter (pig manure) fertilizer, 0.5% of magnesium and 0.05% of silicon;
coating materials: 1.6% (wherein the content of the first coating material is 1.07%, the castor oil polyol accounts for 51.9% of the first coating material, the palm oil polyol accounts for 34.6% of the first coating material, the film-forming assistant accounts for 8% of the first coating material, the catalyst accounts for 1% of the first coating material, the pore-forming agent accounts for 4.5% of the first coating material, the content of the second coating material is 0.53%, the polymethylene polyphenyl polyisocyanate accounts for 60% of the second coating material, and the diphenylmethane diisocyanate accounts for 40% of the second coating material);
fertilizer slow release agent: oxalic acid, content 0.1%;
auxiliary agent: sodium carboxymethylcellulose with a content of 0.5%;
the balance of filler: kaolin, to make up to 100%.
Example 7
0.16% chlorantraniliprole and thiamethoxam controlled release pesticide fertilizer (N-P) 2 O 5 -K 2 O＝15-10-15)
The structure and the preparation method of the vegetable oil coated controlled release fertilizer of the embodiment 7 are the same as those of the embodiment 1, and the composition is different from that of the vegetable oil coated material; specifically, the composition comprises the following components in percentage by weight:
insecticide: 0.04% of chlorantraniliprole and 0.12% of thiamethoxam;
the fertilizer comprises the following effective components: n content 15% (urea and diammonium phosphate), P 2 O 5 Content of 10% (diammonium phosphate), K 2 15 percent of O (potassium chloride), 30 percent of organic matter (pig manure) fertilizer, 0.5 percent of magnesium and 0.05 percent of silicon;
coating materials: 2.1 percent (wherein the content of the first coating material is 1.4 percent, namely castor oil polyol accounts for 52.8 percent of the first coating material, palm oil polyol accounts for 35.2 percent of the first coating material, film-forming assistant accounts for 8 percent of the first coating material, catalyst accounts for 1 percent of the first coating material, pore-forming agent accounts for 3 percent of the first coating material, the content of the second coating material is 0.7 percent, and comprises polymethylene polyphenyl polyisocyanate accounts for 60 percent of the second coating material, and diphenylmethane diisocyanate accounts for 40 percent of the second coating material);
fertilizer slow release agent: oxalic acid, content 0.1%;
auxiliary agent: sodium carboxymethylcellulose with a content of 0.5%;
the balance of filler: kaolin, to make up to 100%.
Example 8
0.16% chlorantraniliprole and thiamethoxam controlled release pesticide fertilizer (N-P) 2 O 5 -K 2 O＝15-10-15)
The structure and the preparation method of the vegetable oil coated controlled-release fertilizer are the same as those of the embodiment 1, and the composition is different from that of the vegetable oil coated material; specifically, the composition comprises the following components in percentage by weight:
insecticide: 0.04% of chlorantraniliprole and 0.12% of thiamethoxam;
the fertilizer comprises the following effective components: n content 15% (urea and diammonium phosphate), P 2 O 5 Content 10% (diammonium phosphate), K 2 15 percent of O (potassium chloride), 30 percent of organic matter (pig manure) fertilizer, 0.5 percent of magnesium and 0.05 percent of silicon;
coating materials: 2.6% (wherein the content of the first coating material is 1.73%, the castor oil polyol accounts for 52.8% of the first coating material, the palm oil polyol accounts for 35.2% of the first coating material, the film-forming assistant accounts for 8% of the first coating material, the catalyst accounts for 1% of the first coating material, the pore-forming agent accounts for 3% of the first coating material, the content of the second coating material is 0.87%, the polymethylene polyphenyl polyisocyanate accounts for 60% of the second coating material, and the diphenylmethane diisocyanate accounts for 40% of the second coating material);
fertilizer slow release agent: oxalic acid, content 0.1%;
auxiliary agent: sodium carboxymethylcellulose with a content of 0.5%;
the balance of filler: kaolin, to make up to 100%.
Comparative example 1
0.16% chlorantraniliprole and thiamethoxam insecticide fertilizer (N-P) 2 O 5 -K 2 O＝15-10-15)
The vegetable oil coated controlled-release fertilizer of the comparative example 1 is the same as that of the example 1 in structure and preparation method, and lacks of a film-coated material in composition; specifically, the composition comprises the following components in percentage by weight:
insecticide: 0.04% of chlorantraniliprole and 0.12% of thiamethoxam;
the fertilizer comprises the following effective components: n content 15% (urea and diammonium phosphate), P 2 O 5 Content 10% (diammonium phosphate), K 2 15 percent of O (potassium chloride), 30 percent of organic matter (pig manure) fertilizer, 0.5 percent of magnesium and 0.05 percent of silicon;
fertilizer slow release agent: oxalic acid, content 0.1%;
auxiliary agent: sodium carboxymethylcellulose with a content of 0.5%;
the balance of filler: kaolin, to make up to 100%.
Application example 1
Release rate test of coated controlled-release fertilizer
The coated controlled-release fertilizer prepared in examples 1-8 and comparative example 1 was used as a test fertilizer, and a commercially available 0.16% chlorantraniliprole/thiamethoxam fertilizer granule (wherein: N-P) 2 O 5 -K 2 O = 15-10-15) as a control, 10g of the test fertilizer to be tested was weighed in a liquid filter bag, the mouth of the liquid filter bag was closed, the liquid filter bag was placed in a 150mL beaker, 100mL of deionized water was added, the liquid filter bag was completely immersed in the deionized water, and the beaker was placed in a thermostat at 25 ℃. Sampling is carried out every 14 days after 1d, 3d, 7d, 14d, 21d, 28d, 35d, 42d, 49d, 56d, 63d, 70d, 77d, 84d, 91d, until the cumulative release rate of the medical fertilizer reaches 80%. 1mL of solution was sampled each time (removed after shaking in order to make the solution homogeneous in the vessel) and was replenished with the same amount of deionized water, keeping the total volume of liquid constant. According to the methods specified in GB28128-2011 and GB/T8572-2010, the contents of thiamethoxam and total nitrogen in the release solution are respectively measured by adopting a high performance liquid chromatography method and a titration method, and the dissolution rate is calculated. The time required for the thiamethoxam and nitrogen fertilizer release rates to be 80% are shown in tables 1 and 2, respectively.
TABLE 1 time required for release of 80% thiamethoxam for examples 1-8, comparative example 1 and control
The experimental results in table 1 show that the thiamethoxam dissolution rate of the control commercial 0.16% thiamethoxam insecticide-fertilizer granules reaches 80% at 18 days, the release rate is fastest, the thiamethoxam release rate of the comparative example 1 is second, the dissolution rate reaches 80% at 20 days, and the thiamethoxam release rates of examples 1, 2, 5, 7 and 8 are inversely related to the thickness of the vegetable oil-coated film material and continuously decrease; the thiamethoxam release rates of examples 3-6 are positively correlated with the amount of the pore-forming agent, and the amounts are increased continuously. Therefore, the pesticide component of the plant oil-coated controlled-release pesticide fertilizer prepared by the invention has a good slow-release effect, the thickness of the coating material and the number of the membrane holes of the coating layer can be controlled by adjusting the using amount of the resin coating material and the using amount of the pore-forming agent, and the slow-release time of the pesticide active component is further controlled, so that the gradient release of the pesticide active component can be realized according to the actual needs of crop pest control.
TABLE 2 time required for release of 80% of nitrogen for examples 1-8, comparative example 1 and control
The experimental results in table 2 show that the dissolution rate of nitrogen reaches 80% at 22 days, the release rate is fastest, the thiamethoxam release rate of comparative example 1 is second, the dissolution rate reaches 80% at 25 days, and the nitrogen release rates of examples 1, 2, 5, 7 and 8 are inversely related to the thickness of the vegetable oil-coated film material and continuously decrease; the nitrogen release rates of examples 3-6 were positively correlated with the amounts of porogen and increased progressively. Therefore, the pesticide component of the plant oil-coated controlled-release pesticide fertilizer prepared by the invention has a good slow-release effect, the coating thickness of the pesticide coated by the coating material and the number of coating holes of the coating layer can be controlled by adjusting the using amount of the resin coating material and the using amount of the pore-forming agent, and the slow-release time of nitrogen can be controlled.
As can be seen from the results in tables 1 and 2, the coated controlled-release fertilizer has good slow-release effect, has dual controlled release of pesticide and fertilizer, and can be regulated and controlled according to the actual needs (i.e., different growth cycles) of crops.
Application example 2
The granular insecticide-fertilizer of 0.16 percent of the chlorantraniliprole prepared in the examples 1 to 8 and the comparative example 1 is used as a test insecticide-fertilizer, and the granular insecticide-fertilizer of the commercially available 0.16 percent of the chlorantraniliprole (wherein, N-P) 2 O 5 -K 2 O = 15-10-15) as a positive control, with 10 application zones and 1 non-application zone as blank controls for the test. The cell area is 66.7m by random block arrangement 2 And protective rows are arranged around the test area, and the row spacing is 1.1m. 9 application areas of the sugarcane are respectively applied with the 0.16% chlorantraniliprole and thiamethoxam granular insecticide-fertilizer prepared in examples 1-8 and comparative example 1, the other 1 application area is applied with the commercially available 0.16% chlorantraniliprole insecticide-fertilizer granular insecticide-fertilizer, the application of 30 kg/mu and 80 kg/mu is respectively carried out during the sowing and topdressing and hilling, and 4 times of repetition are set for each test group. The seeding quantity of the sugarcane (double-bud seedlings) is 32000 segments/hm 2 The variety is Yue Tang No. 61, the pesticide fertilizer is spread in the ditch before sowing, and the management of fertilizer application, weeding and the like is consistent with the conventional production management except that no pesticide is additionally applied in field management. Investigating all sugarcane dead center seedlings in a community after the generation 1 stem borer generates a peak and when the dead center is stable, and investigating dead center seedlings once in 40 days, 60 days, 90 days and 120 days respectively for 4 times; respectively investigating the rate of emergence and the number of tillers after the germination and the tillers are stable, investigating the plant height, the stem diameter, the acre effective stems and the acre yield in the mature period, and calculating the withering rate, the prevention and treatment effect, the germination rate and the tillering rate according to the following calculation methods, wherein the test results are listed in tables 3 and 4:
borer dry heart rate (%) = number of dry heart seedlings/number of total seedlings x 100;
borer control effect (%) = (blank control area withered heart rate-medicine fertilizer area withered heart rate)/blank control area withered heart rate x 100;
germination rate (%) = total number of sprouts/total number of sprouts of lower race × 100;
tillering rate (%) = tillering number of seedlings/number of main seedlings × 100, tillering number of seedlings = total number of seedlings-number of main seedlings.
Table 3 test results of mulch film containing insecticide fertilizer in examples 1-8, comparative example 1 and control group for field control of sugarcane borer
As can be seen from table 3, the controlled-release fertilizer containing 0.16% of chlorantraniliprole prepared in examples 1 to 8 has better control effect on sugarcane borers and better duration of efficacy than the fertilizer prepared in comparative example 1 and the commercially available granular pesticide containing 0.16% of chlorantraniliprole, wherein the control effect of example 5 is the best. As can be seen from the sugarcane borer effect test of the pesticide fertilizer prepared in the embodiment 3-6, under the condition of consistent other components, the quantity of membrane pores is adjusted by adjusting the using amount of the pore-forming agent of the vegetable oil-coated material, so that the release rate of the pesticide is controlled, the pesticide effect period is prolonged, and the prevention and treatment effect is improved; the experiments on the prevention and treatment effect of the pesticide fertilizer prepared in the examples 1, 2, 5, 7 and 8 on the sugarcane borers show that the release rate of the pesticide is prolonged by adjusting the dosage of the vegetable oil-coated material (namely, the thickness of the coating), so that the prevention and treatment effect of the pesticide on the sugarcane borers is regulated and controlled, but the more the dosage of the resin coating material is (namely, the thicker the better the thickness is), the better the effect is, and the proper dosage is reasonably matched with the dosage of the pore-forming agent for use.
Table 4 results of tests on the influence of coated fertilizer on agronomic traits and yield of sugar cane in examples 1 to 8, comparative example 1 and control group
As can be seen from table 4, the 0.16% chlorantraniliprole granular insecticide-fertilizer prepared in examples 1 to 8 had better effects of promoting the germination rate, tiller rate, plant height, stem diameter, acre effective stem and acre yield of sugarcane than the insecticide-fertilizer and the 0.16% chlorantraniliprole insecticide-fertilizer granules in comparative example 1. The prepared vegetable oil coated controlled-release pesticide fertilizer has better fertilizer effect, and good growth promotion and yield increase effects.
From the above examples, it can be seen that the pesticide fertilizer provided by the present invention is optimal in terms of pesticide effect and fertilizer effect, and especially the pesticide fertilizer prepared in example 4 has a more prominent effect. Therefore, the plant oil film controlled-release pesticide fertilizer provided by the invention has the advantages that the fertilizer and pesticide are controlled in a dual-release manner, the fertilizer and pesticide duration is prolonged, the fertilizer effect and pesticide effect are obvious, the fertilizer and pesticide utilization rate is improved, the investment cost is saved, and the product is environment-friendly and safe. The production process flow is simple and easy to operate, the production and processing can be realized under the low-temperature condition, and the energy consumption is low.
Although the above embodiments have been described in detail, they are only a part of the embodiments of the present invention, not all of the embodiments, and other embodiments can be obtained without inventive step according to the embodiments, and all of the embodiments belong to the protection scope of the present invention.
Claims (10)
1. The coated controlled-release pesticide fertilizer is characterized by comprising a core fertilizer layer, a first coating layer, an insecticide layer and a second coating layer from inside to outside in sequence.
2. The coated controlled-release pesticide fertilizer as claimed in claim 1, which comprises 0.05-3.0% of pesticide, 30-84% of fertilizer, 0.1-3% of fertilizer slow-release agent, 0.05-3% of auxiliary agent, 0.6-2.6% of coating material and the balance of filler by mass percentage.
3. The coated controlled-release pesticide fertilizer as claimed in claim 2, wherein the coating material comprises a first coating material and a second coating material in parts by mass;
the first coating material comprises 75-95 parts of plant polyol, 4-15 parts of film-forming additive, 0.1-5 parts of pore-foaming agent and 0.2-2.0 parts of catalyst;
the second coating material comprises polyisocyanate.
4. The coated controlled-release pesticide fertilizer as claimed in claim 3, wherein the mass ratio of the first coating material to the second coating material is 1: (0.4-1.0).
5. The coated controlled-release medicinal fertilizer as claimed in claim 2, wherein the effective components in the fertilizer comprise N and P 2 O 5 、K 2 O, mg, silicon and organic matter.
6. The coated controlled-release pesticide-fertilizer according to claim 2, wherein the pesticide comprises one or two of chlorantraniliprole, cyantraniliprole, monosultap, imidacloprid, thiamethoxam, clothianidin, dinotefuran, pyraclostrobin, azoxystrobin, kresoxim-methyl, difenoconazole and oxadixyl.
7. The coated controlled-release drug fertilizer of claim 3, wherein the vegetable polyol comprises one or more of castor oil polyol, flax oil polyol, sesame oil polyol, rapeseed oil polyol, soybean oil polyol, palm oil polyol, tea seed oil polyol, and tung oil polyol.
8. The method for preparing the coated controlled-release pesticide-fertilizer according to any one of claims 1 to 7, which is characterized by comprising the following preparation steps:
mixing and granulating a fertilizer, a fertilizer slow-release agent, an auxiliary agent and a filler to obtain a core fertilizer layer;
preheating the core fertilizer layer to 60-70 ℃, spraying a coating material on the surface of the preheated core fertilizer layer, and polymerizing in situ on the surface of the core fertilizer layer to form a first coating layer to obtain a coated controlled-release fertilizer;
spraying pesticide on the surface of the coated controlled-release fertilizer to obtain a controlled-release pesticide fertilizer;
spraying the coating material on the surface of the controlled-release pesticide fertilizer for the first time to generate in-situ polymerization; and spraying the coating material for the second time to perform in-situ polymerization to obtain the coated controlled-release pesticide fertilizer.
9. The preparation method according to claim 8, wherein the mass ratio of the coating material used in the stage of preparing the coated controlled-release fertilizer to the coating material used in the stage of preparing the coated controlled-release medicinal fertilizer is (3-5): (5-7);
in the stage of preparing the coated controlled-release pesticide-fertilizer, the mass ratio of the coating materials used for the first spraying to the coating materials used for the second spraying is (3-5): (5-7).
10. Use of the coated controlled-release fertilizer according to any one of claims 1 to 7 or the coated controlled-release fertilizer prepared by the preparation method according to any one of claims 8 to 9 for promoting plant growth;
the plants include sugarcane, corn, banana, sweet potato and rice.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210903323.6A CN115141060A (en) | 2022-07-29 | 2022-07-29 | Coated controlled-release pesticide fertilizer, preparation method and application thereof |
| ZA2022/13574A ZA202213574B (en) | 2022-07-29 | 2022-12-15 | Coated controlled-release pesticide fertilizer and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210903323.6A CN115141060A (en) | 2022-07-29 | 2022-07-29 | Coated controlled-release pesticide fertilizer, preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115141060A true CN115141060A (en) | 2022-10-04 |
Family
ID=83413311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210903323.6A Pending CN115141060A (en) | 2022-07-29 | 2022-07-29 | Coated controlled-release pesticide fertilizer, preparation method and application thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115141060A (en) |
| ZA (1) | ZA202213574B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117430462A (en) * | 2023-11-09 | 2024-01-23 | 烟台众德集团有限公司 | Gel-coated slow-release fungus bacterial fertilizer and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104447026A (en) * | 2014-12-12 | 2015-03-25 | 华南农业大学 | Nutrient release rate adjustable plant oil coated controlled-release fertilizer and preparation method thereof |
| CN109627088A (en) * | 2018-12-29 | 2019-04-16 | 河南好年景生物发展有限公司 | A kind of Intelligent controlled release medicine fat particles agent of nitrile compounds containing aryl-pyrrolidine and pyridine insecticides |
| CN110194695A (en) * | 2019-05-16 | 2019-09-03 | 华南农业大学 | A kind of coated fertilizer, coated release-controlled medicine fertilizer and its preparation method and application |
| CN111454092A (en) * | 2020-05-13 | 2020-07-28 | 河南好年景生物发展有限公司 | Broad-spectrum intelligent controlled-release pesticide fertilizer granule and preparation method and application thereof |
| CN113149775A (en) * | 2020-12-31 | 2021-07-23 | 河南好年景生物发展有限公司 | Controlled-release pesticide fertilizer granule containing aryl pyrrole carbonitrile and methoxyacrylate |
-
2022
- 2022-07-29 CN CN202210903323.6A patent/CN115141060A/en active Pending
- 2022-12-15 ZA ZA2022/13574A patent/ZA202213574B/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104447026A (en) * | 2014-12-12 | 2015-03-25 | 华南农业大学 | Nutrient release rate adjustable plant oil coated controlled-release fertilizer and preparation method thereof |
| CN109627088A (en) * | 2018-12-29 | 2019-04-16 | 河南好年景生物发展有限公司 | A kind of Intelligent controlled release medicine fat particles agent of nitrile compounds containing aryl-pyrrolidine and pyridine insecticides |
| CN110194695A (en) * | 2019-05-16 | 2019-09-03 | 华南农业大学 | A kind of coated fertilizer, coated release-controlled medicine fertilizer and its preparation method and application |
| CN111454092A (en) * | 2020-05-13 | 2020-07-28 | 河南好年景生物发展有限公司 | Broad-spectrum intelligent controlled-release pesticide fertilizer granule and preparation method and application thereof |
| CN113149775A (en) * | 2020-12-31 | 2021-07-23 | 河南好年景生物发展有限公司 | Controlled-release pesticide fertilizer granule containing aryl pyrrole carbonitrile and methoxyacrylate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117430462A (en) * | 2023-11-09 | 2024-01-23 | 烟台众德集团有限公司 | Gel-coated slow-release fungus bacterial fertilizer and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA202213574B (en) | 2023-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105815165A (en) | Method for planting selenium-enriched rice at high yield | |
| CN108530232A (en) | A kind of efficient biologic-organic fertilizer and preparation method thereof | |
| CN105884510B (en) | High-activity particle type biological organic fertilizer and its preparation method and application | |
| CN107098746A (en) | A kind of capsicum Special compound microbial fertilizer and preparation method thereof | |
| CN108484300A (en) | Ureaformaldehyde Synergistic composite fertilizer production technology | |
| CN107245001A (en) | A kind of functional slow-release fertilizer and its production method | |
| CN104072249A (en) | Pasture seed pelletizing matrix | |
| CN107746342A (en) | A kind of water keeping organic fertilizer and preparation method thereof | |
| CN111377766A (en) | Double-machine double-control marine biological peptide pesticide fertilizer containing tea saponin and preparation method and application thereof | |
| CN115141060A (en) | Coated controlled-release pesticide fertilizer, preparation method and application thereof | |
| CN110408406A (en) | Agricultural water-retaining agent based on bamboo vinegar powder and preparation method thereof | |
| CN106069051A (en) | A kind of Huanghe delta good quality wheat yield-increasing cultivation technology | |
| CN112521224A (en) | Soil improvement preparation and preparation method thereof | |
| CN107500921A (en) | A kind of process of high tower production nitric fulvic acid composite fertilizer and its composite fertilizer | |
| CN113024305A (en) | Double-sustained-release pesticide fertilizer containing medium trace elements and preparation method thereof | |
| WO2024032339A1 (en) | Preparation method for orchard base fertilizer and application method therefor | |
| CN109717027A (en) | A kind of corn planting method that low-temperature resistance damages to plants caused by sudden drop in temperature | |
| CN109651014A (en) | A kind of multiple function stable type coated fertilizer and preparation method thereof | |
| CN111533601A (en) | Double-machine double-control marine biological peptide multifunctional pesticide fertilizer and preparation method and application thereof | |
| CN104710228A (en) | Low-temperature resistance composite fertilizer auxiliary agent, preparation method and application thereof | |
| CN112314139A (en) | Fertilizing method for improving grassland productivity | |
| CN104892165B (en) | A kind of environmental friendly fertilizer synergist | |
| CN113632630B (en) | Simplified fertilization method for Huang Pang original summer corn | |
| CN111116259B (en) | Stable fertilizer and preparation method thereof | |
| CN114133298B (en) | One-time fertilization and industrial seedling raising method for rice |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |