Nitrogen stable-release compound additive and application thereof

Abstract

The invention discloses a nitrogen stable-release compound additive and application thereof. The nitrogen stable-release compound additive is composed of cyanamide compound, bentonite, clinoptilolite and citrate-soluble silico-calcium powder. The nitrogen stable-release compound additive containing secondary elements and microelements can enhance the nitrogen utilization ratio of the nitrogen fertilizer, reduce the gas state loss and leaching loss of the nitrogen fertilizer, reduce the loss and waste of excessive elements and enhance the return rate of the fertilizer. The long-acting slow-release compound (mixed) fertilizer prepared by mixing the nitrogen stable-release compound additive and nitrogen compound (mixed) fertilizer has the advantages of high nitrogen utilization ratio and long fertilizer efficiency, enables the fertilizer supply rate to be basically consistent with the fertilizer demand law of crops, can satisfy the demands of the crops for the whole growing season without supplementing fertilizer after application of base fertilizer once, saves the fertilizer, lowers the cost, enhances the yield, and improves the quality.

Description

technical field [0001] The invention relates to a nitrogen stable release combined additive, in particular to a nitrogen stable release combined additive for producing slow-release and long-acting compound fertilizers. Background technique [0002] my country is the world's largest chemical fertilizer consumption and production country, and its production and application are increasing year by year, especially in some economically developed coastal areas. The expensive rural labor costs make people abandon the tradition of using organic fertilizers and rely on a large amount of chemical fertilizers. put in. According to statistics, my country's total consumption of chemical fertilizers is about 46 million tons, of which nitrogen fertilizer consumption is about 23 million tons. China's chemical fertilizer production accounts for more than 1 / 5 of the world's total chemical fertilizer production, ranking first in the world. [0003] In recent years, although the proportion of c...

AI Technical Summary

Problems solved by technology

However, the nitrogen stabilizing additives used in the production of compound fertilizers in the prior art have problems such as single function, unsatisfactory effect, high price, increased input cost, and impact on the soil ecological environment.

[0004] In addition, although there is no requirement for trace elements in the existing compound fertilizer production standards, compound fertilizer manufacturers seldom add trace elements due to cost considerations. Physiological diseases due to lack of nutrients appear, which become the limiting factor that limits the increase in yield