High-phosphate slow and controlled-release fertilizer and preparation method thereof

A slow and controlled release fertilizer, high phosphorus technology, applied in the direction of phosphate fertilizer, ammonium orthophosphate fertilizer, alkaline orthophosphate fertilizer, etc., can solve the problems of unfavorable crop growth, poor control of fertilizer loss and release rate, etc., to reduce Insufficient crop support, convenient for large-scale promotion and application, good reproducible effect

Inactive Publication Date: 2016-07-27
SHANDONG ZHIFENG NONGHUA GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the above-mentioned shortcomings existing in the prior art, and provides a high-phosphorus slow-controlled release fertilizer, which solves the problem that the existing controlled-release fertilizer cannot well control the loss and release rate of the fertilizer, which is not conducive to c

Method used

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  • High-phosphate slow and controlled-release fertilizer and preparation method thereof
  • High-phosphate slow and controlled-release fertilizer and preparation method thereof
  • High-phosphate slow and controlled-release fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The utility model relates to a high-phosphorus slow-controlled-release fertilizer, which consists of a pellet core, an intermediate layer and a coating layer in order from the inside to the outside. The weight ratio of the pellet core, the intermediate layer and the coating layer is 1:2:2.5;

[0026] Described high phosphorus slow and controlled release fertilizer is made up of the following components by weight:

[0027] Pill core: diammonium phosphate 40, zinc sulfate monohydrate 12, sodium selenite 9, calcium lignosulfonate 16, fulvic acid 5, nucleotide 7, microcrystalline cellulose 25, polyvinylpyrrolidone 7 and hydroxypropyl base cellulose 10;

[0028] Middle layer: apatite powder 35, urea 25, ferrous sulfate 13, shell powder 3, guar gum 10, croscarmellose sodium 4, humic acid 4, diatomaceous earth 13;

[0029] Coating layer: monoammonium phosphate 60, diammonium phosphate 45, ammonium nitrate 13, potassium chloride 13, feldspar powder 25, naphthalene acetic acid...

Embodiment 2

[0036] The utility model relates to a high-phosphorus slow-controlled-release fertilizer, which consists of a pellet core, an intermediate layer and a coating layer in order from the inside to the outside. The weight ratio of the pellet core, the intermediate layer and the coating layer is 1:1.5:2;

[0037] Described high phosphorus slow and controlled release fertilizer is made up of the following components by weight:

[0038] Pill core: diammonium phosphate 30, zinc sulfate monohydrate 10, sodium selenite 8, calcium lignosulfonate 15, fulvic acid 3, nucleotide 5, microcrystalline cellulose 20, polyvinylpyrrolidone 4 and hydroxypropyl base cellulose 1;

[0039] Middle layer: apatite powder 25, urea 20, ferrous sulfate 10, shell powder 1, guar gum 5, croscarmellose sodium 1, humic acid 2, diatomaceous earth 10;

[0040] Coating layer: monoammonium phosphate 50, diammonium phosphate 30, ammonium nitrate 10, potassium chloride 10, feldspar powder 20, naphthalene acetic acid 1...

Embodiment 3

[0044] The utility model relates to a high-phosphorus slow-controlled-release fertilizer, which consists of a pellet core, an intermediate layer and a coating layer in order from the inside to the outside. The weight ratio of the pellet core, the intermediate layer and the coating layer is 1:2.5:3;

[0045] Described high phosphorus slow and controlled release fertilizer is made up of the following components by weight:

[0046] Pill Core: Diammonium Phosphate 50, Zinc Sulfate Monohydrate 15, Sodium Selenite 10, Calcium Lignosulfonate 18, Fulvic Acid 6, Nucleotide 8, Microcrystalline Cellulose 30, Polyvinylpyrrolidone 8 and Hydroxypropyl base cellulose 15;

[0047] Middle layer: apatite powder 50, urea 30, ferrous sulfate 15, shell powder 5, guar gum 15, croscarmellose sodium 5, humic acid 5, diatomaceous earth 15;

[0048] Coating layer: monoammonium phosphate 70, diammonium phosphate 50, ammonium nitrate 15, potassium chloride 15, feldspar powder 30, naphthalene acetic acid ...

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Abstract

The invention relates to a high-phosphate slow and controlled-release fertilizer and a preparation method thereof. The high-phosphate slow and controlled-release fertilizer comprises a pill core, a middle layer and a coating layer in sequence from inside to outside. The invention further provides a preparation method of the high-phosphate slow and controlled-release fertilizer. The preparation method comprises the following steps of: firstly, preparing the pill core by using an extrusion-spheronization method, and coating with the middle layer and the coating layer. The preparation method provided by the invention is simple in process, the fertilizer efficiency of the prepared high-phosphate slow and controlled-release fertilizer is completely released, and the fertilizer has the characteristic of controllable and stable quality. The problems that the fertilizer loss and the release velocity of a conventional controlled-release fertilizer cannot be well controlled and thus crop growth is retarded are solved, the utilization rate of the fertilizer is effectively increased, natural loss of the fertilizer is prevented, closed pollution of the fertilizer to soil is reduced, yield increase of crops is ensured, and effective components have no loss such as sublimation in the production and storage process.

Description

technical field [0001] The invention belongs to the technical field of agricultural fertilizers, and relates to a high-phosphorus slow-controlled-release fertilizer and a preparation method. technical background [0002] Fertilizers play an important role in agricultural production and account for more than 30% of the many factors that increase production. my country is a big country in the production and use of chemical fertilizers, and its output and usage rank first in the world. However, the quality of the products needs to be further improved. The main problems are the low utilization rate of fertilizers, the short fertilizer effect period and the single function. Chemical fertilizers have been recognized as playing a pivotal role in increasing crop yields. At present, the utilization rate of chemical fertilizers is less than 30%, and the rest is lost with soil and water. The application of chemical fertilizers not only causes great waste, but also pollutes soil and gr...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C05G5/00C05G3/80
CPCC05B7/00C05B17/00C05G3/00C05G3/80C05G5/30C05D3/00C05D9/02C05C9/00C05D9/00C05F1/005C05F11/02C05C1/00C05D1/02
Inventor 吴德华丁耀平
Owner SHANDONG ZHIFENG NONGHUA GRP
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