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Nitrogen, phosphorus, potassium high content controlled release composite fertilizer special for cotton and its preparation method

A high-content, compound fertilizer technology, applied in the direction of urea compound fertilizer, nitrogen fertilizer, potassium fertilizer, etc., can solve the problems of cotton quality decline, large amount of use, heavy labor, etc., and achieve the goal of reducing fertilizer loss, improving light and performance, and reducing labor costs Effect

Inactive Publication Date: 2007-04-18
刘俊松
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional cotton fertilization is not only a large amount, high cost, and heavy labor, but also excessive application of inorganic fertilizers will cause soil compaction, fertilizer loss, environmental pollution and cotton quality decline and other adverse effects
At the same time, excessive use of single chemical fertilizers can easily lead to nutritional imbalance, growth and lodging of cotton

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: A method for preparing a cotton-specific controlled-release compound fertilizer with high nitrogen, phosphorus, and potassium content, which includes the following steps:

[0030]1). Preparation of coated urea 100: (a) Select granular urea with a diameter of 3-4mm, put it into a fluidized bed, and heat to 70°C; (b) According to the weight percentage of the coated urea 100 to 100 Is 12, and the weight percentage of urea in 100 coated urea is 88. Select coating 100 and urea; to prepare coating 100: According to the weight percentage of each component, the weight percentage of coating 100 is: clay mineral: 57, biodegradable resin: 42. Active agent: 1 Select clay minerals, biodegradable resins and active agents; dissolve the biodegradable resin in a mixed solution of tetrachloromethane and tetrachloroethane each accounting for 1 / 2 of the weight. The weight ratio of biodegradable resin and active agent: mixed solution = 9:90. Add clay minerals and active agent and hea...

Embodiment 2

[0036] Embodiment 2: A method for preparing a cotton-specific controlled-release compound fertilizer with high nitrogen, phosphorus, and potassium content, which includes the following steps:

[0037] 1). Preparation of coated urea 100: (a) Select granular urea with a diameter of 3-4mm, put it into a fluidized bed, and heat it to 60°C; (b) According to the weight percentage of the coated urea 100 It is 10, the weight percentage of urea in the coated urea 100 is 90, and the coating 100 and urea are selected; to prepare the coating 100: according to the weight percentage of each component of the coating 100, it is: clay mineral: 56, biodegradable resin: 43. Active agent: 1 Select clay minerals, biodegradable resins and active agents; dissolve the biodegradable resin in a mixed solution of tetrachloromethane and tetrachloroethane each accounting for 1 / 2 of the weight. The weight ratio of biodegradable resin and active agent: mixed solution = 6:90. Add clay minerals and active agent a...

Embodiment 3

[0042] Example 3: A method for preparing a cotton-specific controlled-release compound fertilizer with high nitrogen, phosphorus, and potassium content, which includes the following steps:

[0043] 1). Preparation of coated urea 100: (a) Select granular urea with a diameter of 3-4mm, put it into a fluidized bed, and heat to 80°C; (b) According to the weight percentage of the coated urea 100 in the coating 100 Is 14, the weight percentage of the coated urea 100 occupied by urea is 86, and the coating 100 and urea are selected; the preparation of the coating 100: according to the weight percentage of each component of the coating 100: clay mineral: 60, biodegradable resin: 39. Active agent: 1 Select clay minerals, biodegradable resins and active agents; dissolve the biodegradable resin in a mixed solution of tetrachloromethane and tetrachloroethane each accounting for 1 / 2 of the weight, and the mixed solution shall be The weight ratio of biodegradable resin and active agent:mixed so...

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Abstract

The present invention relates to a special-purpose control release complex fertilizer and its preparation method. It is characterized by that it is made up by using (by wt%) 15-16% of coating urea 100, 15-16% of coating urea S100, 31-33% of ammonium phosphate and 36-38% of coating potassium chloride. It not only can meet requirements for cotton growth, but also can raise cotton fibre quality.

Description

Technical field [0001] The invention relates to a special controlled-release compound fertilizer for cotton and a preparation method thereof. Background technique [0002] The combined application of nitrogen, phosphorus and potassium fertilizers in cotton field fertilization is an important measure for early maturity, high quality and high yield of cotton. Cotton has different nutritional requirements according to its developmental characteristics. According to reports, the absorption peaks of nitrogen, phosphorus and potassium are generally between flowering and boll release, accounting for about 50-70% of the total absorption. The absorption ratio of nitrogen, phosphorus, and potassium during the growth period of cotton is roughly 1:0.3:1.0. [0003] Traditional cotton fertilization not only requires large amounts, high costs, and heavy labor, but also a large amount of inorganic fertilizers can cause soil compaction, fertilizer loss, environmental pollution, and poor cotton q...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05G3/08C05C9/00C05B7/00C05D1/02C05G3/90
Inventor 刘俊松
Owner 刘俊松
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