Multifunctional soil improved sustained-release environment-friendly fertilizer and preparation method thereof

A soil improvement and multi-functional technology, applied in fertilization devices, fertilizer mixtures, applications, etc., can solve problems such as soil acidification, achieve scientific and reasonable nutrient distribution ratio, reduce nitrogen fertilizer leaching loss, and stabilize the effect
CN102531794AActive Publication Date: 2012-07-04范永强
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
范永强
Publication Date
2012-07-04

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Abstract

The invention relates to a multifunctional soil improved sustained-release environment-friendly fertilizer and a preparation method thereof. The sustained-release environment-friendly fertilizer is prepared from the following raw materials in part by weight through adopting the dry extruding and pelleting technology: 16 to 25 parts of urea, 17 to 19 parts of monoammonium phosphate, 25 to 35 parts of potassium sulfate or potassium chloride, 8 to 12 parts of calcium cyanamide and 18 to 30 parts of filler. According to crop production in China and the current situation of soil, scientific proportion is realized, adaptability of the raw materials is high, the adding amount of urea is less than 20 percent, and drying and cooling procedures are not required during preparation. The multifunctional soil improved sustained-release environment-friendly fertilizer has a stable effect and high utilization ratio of nutrients, and can improve soil, promote growth of crops and improve yield and quality of the crops.
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Description

technical field

[0001] The invention relates to a slow-release fertilizer, in particular to a soil-improving slow-release environment-friendly fertilizer and a preparation method thereof. Background technique

[0002] At present, the total output of compound fertilizer in my country (2010) is about 53 million tons, an increase of about 7% over the previous year. It is expected that the output of compound fertilizer in my country will still maintain a certain growth rate in 2011, and the growth rate will accelerate, which is expected to exceed 8%. The internationally recognized safe upper limit of chemical fertilizer application is 225 kg / ha (pure nutrients, the same below), but currently the average amount of agricultural chemical fertilizer applied per unit area in my country has reached 434.3 kg / ha, which is 1.93 times the safe upper limit. The utilization rate of nitrogen fertilizer in our country is about 27.5%, which is less than half of that of developed countries and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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