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Coated slow-release fertilizer and preparation method thereof

A slow-release fertilizer and wrapping technology, which is applied in layered/coated fertilizers, chemical instruments and methods, nitrogen fertilizers, etc., can solve the problems of insufficient nutrient supply of crops, fast dissolving speed in the later stage, and complicated production process, and achieve the effect of crop growth. Good, long supply time, simple and convenient operation

Inactive Publication Date: 2020-09-11
黑龙江实力农业肥料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is: in order to solve the problem that some trace elements will be added inside the existing slow-release fertilizer, but the addition of trace elements is mostly in the coating on the outside, and the coating will dissolve in the early stage, and the coating after dissolution cannot It plays a role in providing nutrients to the soil and crops, which may lead to insufficient nutrient supply in the later crops, and the existing slow-release fertilizer outer coating process is complicated, the cost is high, the dissolution speed is fast in the later stage, and the slow-release performance is poor. , providing a packaged slow-release fertilizer and a preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A wrapped slow-release fertilizer, comprising a kernel and a coating, the kernel includes the following parts by mass: 50-70 parts by mass of core fertilizer; 10-20 parts by mass of adhesive agent; 5-10 parts by mass of soil conditioner; 0.5-1.5 parts by mass of trace element sulfur Parts by mass; 0.3-0.5 parts by mass of trace element nitrogen; 0.2-0.5 parts by mass of trace element potassium; the coating includes the following parts by mass: 20-40 parts by mass of talcum powder; 20-30 parts by mass of gypsum; 10-20 parts by mass of bentonite; 10-20 parts by mass of biogas residue mixture; 0.5-1.5 parts by mass of trace element sulfur; 0.3-0.5 mass part of trace element nitrogen; 0.2-0.5 mass part of trace element potassium.

[0031] In the present invention, trace elements are added in the preparation process of the inner core and the outer coat, so that in use, even if the outer outer coat is slowly released, the dissolution will take away the trace elements contained...

Embodiment 2

[0033] The core fertilizer is urea, the adhesive is silica sol, and the concentration of sulfur dioxide is 20-35%, and the soil conditioner is a water-retaining soil conditioner, and it includes natural peat and starch of humic acid, natural peat of humic acid and The proportion of starch is 2:1, the trace element sulfur can be one of magnesium sulfate, zinc sulfate and potassium sulfate, the trace element nitrogen can be nitrogen, phosphorus and potassium, and the trace element potassium can be potassium chloride, potassium sulfate and plant ash. A sort of.

[0034]In the present invention, urea is used as a neutral fertilizer. Urea is suitable for various soils and plants. It is easy to preserve, easy to use, and has little damage to soil. It is a chemical nitrogen fertilizer with a large amount of use at present.

Embodiment 3

[0036] The water content of the talcum powder is 5-8%, and the mesh size of the talc powder is 100-200 mesh sieve, the gypsum includes calcium sulfate and water, and the ratio of calcium sulfate and water is 9:1, and the fineness of the gypsum is Gypsum powder passed through a 100-200 mesh sieve, the content of montmorillonite in bentonite is ≥90, and the bentonite is bentonite powder with a fineness of 100-200 mesh sieve, and the biogas residue mixture is a high-temperature anaerobic fermentation product of poultry manure and straw, containing The amount of water is 10%.

[0037] Among the present invention, the main mineral component of bentonite is montmorillonite, and content is 85-95%, and some properties of bentonite also all are determined by montmorillonite, and montmorillonite can be in various colors such as yellow-green, yellow-white, Gray, white, etc., can be dense block, or loose soil, with a slippery feeling when rubbed with fingers, and the volume of the small b...

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Abstract

The invention discloses a coated slow-release fertilizer and a preparation method thereof, and relates to the field of slow-release fertilizers, the coated slow-release fertilizer comprises an inner core and a coating, the inner core comprises the following components: 50 to 70 parts by mass of a core fertilizer, 10 to 20 parts by mass of an adhesive, 5-10 parts by mass of a soil conditioner, 0.5to 1.5 parts by mass of trace element sulfur, 0.3 to 0.5 part by mass of trace element nitrogen and 0.2 to 0.5 part by mass of trace element potassium, wherein the coating is prepared from the following components: 20 to 40 parts by mass of talcum powder, 20 to 30 parts by mass of gypsum, 10 to 20 parts by mass of bentonite, 10-20 parts by mass of a biogas residue mixture, and 0.5 to 1.5 parts bymass of trace element sulfur. According to the invention, trace elements are added in the preparation process of the inner core and the coat; enabling fertilizer in use, even if the outer coating is slowly released and dissolved to take away trace elements contained in the outer coating, the trace elements in the inner core can still provide energy for soil and crops, so that the supply time of the trace elements is long, the growth effect of the crops is good, the nutrient utilization rate is improved, and the effects of slow release, fertilizer efficiency prolonging and no pollution are achieved.

Description

technical field [0001] The invention relates to the field of slow-release fertilizers, in particular to a packaged slow-release fertilizer and a preparation method thereof. Background technique [0002] The so-called "release" refers to the process in which nutrients are transformed from chemical substances into effective forms that can be directly absorbed and utilized by plants (such as dissolution, hydrolysis, degradation, etc.), and "slow release" refers to the release rate of chemical substances and nutrients is much lower than that of instant fertilizers. The release rate of nutrients that are transformed into the available state of plants after the soil; "controlled release" refers to the use of various regulatory mechanisms to make the release of nutrients consistent with the law of nutrient absorption by crops according to the set release mode (release rate and release time). Therefore, Biologically or chemically decomposable organic nitrogen compounds (such as urea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/40C05G3/80C05G5/12C05G5/30C09K17/40
CPCC05C9/00C05G3/00C09K17/40C05G3/40C05G3/80C05G5/12C05G5/30C05D1/00C05D1/02C05D3/00C05D5/00C05D9/00C05D9/02C05F9/04
Inventor 王子君
Owner 黑龙江实力农业肥料科技有限公司
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