Slow-release liquid compound fertilizer

Abstract

The invention provides slow-release liquid compound fertilizer, and belongs to the technical field of compound fertilizer preparation. The slow-release liquid compound fertilizer is prepared from, by weight, 15-65 parts of phosphatic fertilizer, 10-50 parts of calcium fertilizer, 15-60 parts of nitrogenous fertilizer, 1-5 parts of magnesium fertilizer, 1-5 parts of potash fertilizer, 40-200 parts of slow-release fertilizer, 5-10 parts of biological agents, 1-3 parts of emulsifying agents, 2-6 parts of thickening agents, 0.5-5 parts of cosolvent, 1-3 parts of stabilizers and 60-160 parts of water. The slow-release liquid compound fertilizer is rich in nutrition and reasonable in match, particularly the biological agents are added to have the efficient coordinating effect, efficient utilization of the slow-release fertilizer is ensured, and the slow-release liquid compound fertilizer is more suitable for large-area fertilizer application.

Description

technical field [0001] The invention relates to a slow-release liquid compound fertilizer, which belongs to the technical field of compound fertilizer preparation. Background technique [0002] Slow release fertilizer (slow release fertilizer) is a fertilizer manufactured by physical, chemical and biochemical methods that can slowly release nutrients in the fertilizer in the soil and significantly prolong the effectiveness of crops. There is no quantitative regulation on the slow release period and slow release amount. Controlled release fertilizer (controlled release fertilizer) is a coated compound fertilizer and coated urea that uses a polymer coating, which can quantitatively control the amount and release period of nutrients released in the fertilizer, so that the nutrient supply is consistent with the fertilizer requirements of crops in each growth period. The United States was the first country to propose and conduct research on the concept of slow / controlled release ...

AI Technical Summary

Problems solved by technology

[0004] Most of the existing slow-release fertilizers are solid fertilizers, mainly due to the poor stability of liquid fertilizers after coating, so it is difficult to meet the standards in production

However, due to the great convenience of liquid fertilizers, such as more uniform fertilization and large-scale mechanized fertilization, some scholars have developed slow-release liquid compound fertilizers, such as CN201410642231.2, which introduces a slow-release suspension liquid compound fertilizer and its preparation Method and method of use, it uses the ratio of slow-release fertilizer and non-slow-release fertilizer, and uses thickener and emulsifier to increase stability, thereby solving the technical problem of using trace elements and humic acid in conjunction with fertilizers, but it still has Considerable limitations, such as lower fertilizer efficiency, etc.