Controlled-release compound fertilizer

Abstract

The invention relates to a controlled-release compound fertilizer, which consists of the following components in parts by weight: 10-30 parts of a phosphogypsum-fly ash slow-release compound, 20-40 parts of a slow-release nitrogen fertilizer containing a urease inhibitor and a digesting bacteria inhibitor, 15-30 parts of a mixed potassium fertilizer and 2-4 parts of a trace element compound. In the invention, the phosphogypsum-fly ash slow-release compound is adopted, so that slow release of fertilizer nutrients is realized, the utilization ratio of the fertilizer is increased, pollution is eliminated, the environment is protected, resources are saved, and production cost is lowered; and the stable digesting bacteria inhibitor is used, so that the nitration and denitrification reaction rates are effectively lowered, leaching loss of the nitrogen fertilizer and release of the nitrogen fertilizer in the form of NO and NO2 gas are reduced, and the utilization ratio of the fertilizer is increased.

Description

technical field [0001] The invention relates to a controlled release compound fertilizer. Background technique [0002] Chemical fertilizers provide the necessary nutrients for the growth of crops, play a vital role in the yield and quality of agricultural products, occupy a large share in the investment in the agricultural industry, and tend to have adverse effects on the soil environment and the natural environment. Therefore, the combination of nutrients is scientific and reasonable to match the growth needs of plants; the nutrients are released slowly to adapt to the absorption rate of nutrients by plants; the rate of fertilizer degradation and nitrification is slowed down to reduce fertilizer leaching and NO, N0 2 , NH 3 The gas form enters the atmosphere, thereby improving the utilization rate of fertilizers; chemical fertilizers and their manufacturing methods that are beneficial to the protection of soil resources and the natural environment are expected by people. ...

AI Technical Summary

Problems solved by technology

[0003] The slow-release fertilizers in the prior art rely on single-layer or multi-layer coatings, or simply add inhibitors to control the release rate of chemical fertilizer nutrients, and the slow-release effect is not ideal; there are incomplete nutrients and fertilizer components. The adjustment is unreasonable, and the manufacturing process is complicated and the cost is high; there are many problems such as pollution to the soil and the natural environment