Environmental friendly sustained-release long-acting compound fertilizer and method of preparing the same

Abstract

The invention discloses an environment-friendly slow-releasing long-standing compound fertilizer which belongs to polyelement compound fertilizer and a production method thereof. The fertilizer comprises the following raw material ingredient (by parts by weight): 10-40 parts of powdered rock phosphate, 10-40 parts of potassium feldspar, 15-40 parts of coal gangue, 10-20 parts of magnesite powder,10-30 parts of nitrogenous fertilizer, 8-18 parts of swell soil, 1-3 parts of kieselguhr and 0.3-1 part of trace element; the powdered rock phosphate, the coal gangue and proper amount of coke are roasted for 8-16 hours at 500-800 DEG C, cooled, crushes and screened by a 60-mesh sieve. The invention provides an environment-friendly energy-saving fertilizer capable of improving soil with comprehensive effective fertilizer composition, slow releasing and high fertilizer utilization ratio. Meanwhile, the environment-friendly slow-releasing long-standing compound fertilizer is suitable for various soils and growth of various crops and the preparation method thereof is provided. The problems of low fertilizer utilization ratio, environment pollution, hardening soil, high production cost and the like in the prior art are solved.

Description

technical field [0001] The invention is an environment-friendly slow-release long-acting compound fertilizer and a production method thereof. It belongs to multivariate compound fertilizer. In particular, the invention relates to an environment-friendly slow-release long-acting compound fertilizer produced by directly using phosphate rock, potassium feldspar, coal gangue and magnesite powder as raw material components and a preparation method thereof. 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. In recent years, the disadvantages caused by the large and disorderly use of chemical fertilizers have become obvious. For example: low fertilizer utilization rate caused by fast decomposition; pollu...

AI Technical Summary

Problems solved by technology

For example: low fertilizer utilization rate caused by fast decomposition; pollution caused by the release of decomposition products to the atmosphere and water bodies; soil compaction, damage to the soil ecological environment for crop growth, etc.

[0003] In the prior art, people adopt technical schemes such as adding nitrogen fertilizer slow-release agents to play a certain role in slowing down the release of nitrogen fertilizer and improving the utilization rate of nitrogen fertilizer. Manufacture of multivariate fertilizers; only limited to the slow release of nitrogen fertilizers, with little synergistic effect on the slow release of other fertilizer components; powerless to environmental protection and soil improvement

And it is expensive, which increases the manufacturing cost of fertilizer and the cost of agricultural production

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