Special slow-release fertilizer for cotton and preparation method thereof

Abstract

The invention discloses a slow-release fertilizer special for cotton and a preparation method thereof. The slow-release fertilizer special for the cotton is prepared from the following raw materials: by weight, 12-15 parts of urea, 12-15 parts of ammonium chloride, 6-9 parts of potassium chloride, 5-8 parts of monoammonium phosphate, 1-2 parts of copper sulfate, 1-2 parts of sodium selenite, 1-2 parts of ferrous sulfate, 2-3 parts of quicklime, 5-6 parts of meerschaum, 2-3 parts of calcium carbonate, 1-2 parts of melia root bark powder, 1-2 parts of drug residue ash, 0.01-0.02 part of compound sodium nitrophenolate, 2-3 parts of brown sugar and 1-2 parts of waste engine oil. In the slow-release fertilizer special for the cotton, through a bonding effect of the brown sugar, the copper sulfate, the sodium selenite and the ferrous sulfate are mixed, so that when the fertilizer releases, balance fertilizer efficiency can be guaranteed. The waste engine oil can coats all the fertilizer components so as to play a slow release effect. The quicklime can improve heavy metal pollution of soil, can combine heavy metals to deactivate the heavy metals, and can improve growth environment and conditions of the cotton. Because of reasonable allocation and slow release of nutrient elements such as nitrogen, phosphorus, potassium and various trace elements, the nutrient elements such as the nitrogen, the phosphorus, the potassium and the various trace elements are beneficial for growth of the cotton. The cotton yield can be increased by 20% to 25%, and diseases and insect pests during cotton growing periods can be decreased.

Description

Technical field [0001] The invention relates to a compound fertilizer, in particular to a slow-release fertilizer special for cotton and a preparation method thereof. Background technique [0002] Special fertilizer is a physical and chemical technology product of balanced fertilization technology. It is an important condition for cultivating soil fertility and promoting continuous increase in agricultural production. It has the advantages of strong pertinence and regionality, high fertilizer utilization, convenient application, multiple functions, and high technical content. However, the existing The special fertilizer for cotton cannot be released slowly, resulting in uneven release of fertility during the growth period of cotton, which cannot meet the needs of cotton growth. Summary of the invention [0003] The purpose of the present invention is to provide a special fertilizer for cotton, various fertilizer elements can be released slowly, can continuously meet the growth nee...

AI Technical Summary

Problems solved by technology

[0002] Special fertilizers are physical and chemical technology products of balanced fertilization technology, and are an important condition for cultivating soil fertility and promoting sustainable agricultural production. Special fertilizers for cotton cannot be released slowly, resulting in uneven fertility release during the cotton growth period, which cannot meet the needs of cotton growth