Slow-release nitrogenous fertilizer of containing middle quantity and trace elements

Abstract

This invention discloses a sustained-release nitrogen fertilizer containing secondary and trace elements. The sustained-release nitrogen fertilizer is composed of: urea 10-96 parts, ammonium sulfate 0.1-78.8 parts, attapulgite powder 0-8 parts, ammonium chloride 0.1-78.8 parts, magnesium sulfate 0.05-2.0 parts, borax 0.01-1 part, copper sulfate 0.01-0.2 part, manganese sulfate 0.01-0.6 part, ferrous sulfate 0.01-1 part, zinc sulfate 0.01-1 part, acetohydroxamic acid 0.01-0.02 part, composite amino acids 0.01-1 part, and dicyandiamide 0.01-0.2 part. The sustained-release nitrogen fertilizer is prepared by: mixing the above components, adding into a disc granulator, spraying an appropriate amount of water, granulating and drying. The sustained-release nitrogen fertilizer has such advantages as long effective period and high effective utilization rate (above 45%). Crops applied with the sustained-release nitrogen fertilizer have such advantages as high stress resistance and high yield.

Description

technical field [0001] The invention relates to a slow-release nitrogen fertilizer containing medium and trace elements, which belongs to the field of chemical industry. Background technique [0002] With the reform of my country's agricultural planting structure, the amount of nitrogen fertilizer is increasing year by year. However, the utilization rate of conventional nitrogen fertilizers is only 25% to 35%, and the remaining part of nitrogen flows into the air and groundwater, causing great pollution to the atmosphere and water resources. The topdressing of a single nitrogen fertilizer makes the nutrition of crops seriously unbalanced, and the deficiencies that affect crop yield and quality are becoming more and more obvious. However, at present, there is no high-quality nitrogen fertilizer that can improve the utilization rate of nitrogen fertilizer, reduce environmental pollution, and promote the nutritional balance of crops, improve crop stress resistance, increase yi...

AI Technical Summary

Problems solved by technology

The utilization rate of conventional nitrogen fertilizers is only 25% to 35%, and the rest of the nitrogen flows into the air and groundwater, causing great pollution to the atmosphere and water resources.

The topdressing of a single nitrogen fertilizer makes the nutrition of crops seriously unbalanced, and the deficiency disease that affects crop yield and quality becomes more and more obvious

However, at present, there is no high-quality nitrogen fertilizer that can improve the utilization rate of nitrogen fertilizer, reduce environmental pollution, and promote the nutritional balance of crops, improve crop stress resistance, increase yield, and improve the quality of agricultural products.