Compound bio-fertilizer containing toosendanin and its preparation method

Abstract

A biological compound fertilizer containing nimbin, using Aspergillus awamori, Coccidioides mollii, Bacillus subtilis and Geotrichum candidum as strains, the strains are cultured and enlarged to make a mixed bacterial agent according to 3:1:3:2; According to the weight ratio, the mixed bacterial agent is mixed with organic compound, urea and phosphate rock powder, and then neem tree seed powder is added to prepare the biological compound fertilizer containing neemin. The biocomposite fertilizer containing neemin prepared according to the present invention can inhibit nitrification, can significantly improve the utilization rate of nitrogen fertilizer, can reduce the loss rate of urea by 50%, and reduce the loss rate of ammonium nitrogen fertilizer or nitrogen fertilizer containing ammonia by 25%; and It has a certain function of avoiding rodents and killing insects, and at the same time activates soil nutrients, improves crop quality, promotes plant growth, and increases crop yield by an average of 25.7%. The formula is reasonable, the process is simple, and the quality is stable, and it is a new biological compound fertilizer containing neemin.

Description

technical field [0001] The invention belongs to biological fertilizers, in particular to a biological compound fertilizer containing neemin and a preparation method of the fertilizer. Background technique [0002] Urea is the largest amount of nitrogen fertilizer in Asia and even the world, accounting for more than 85% of nitrogen fertilizer production. However, after nitrogen fertilizer is applied, it is easily decomposed into ammonia under the action of urease. A part of ammonia volatilizes in a gaseous state, especially in soils with high pH, ​​and its loss rate is as high as 50% or more; a part of ammonia is oxidized by nitrifying bacteria into nitrate nitrogen, which will be lost by leaching and denitrification. The utilization rate of nitrogen fertilizer is usually only 40% to 45%, or even lower. For this reason, N carriers and nitrification inhibitors for crop nitrogen fertilizers are being developed all over the world to improve nitrogen fertilizer use efficiency. ...

AI Technical Summary

Problems solved by technology

There is a record of using neem seeds to extract neem in foreign countries. Due to the low content of neem, the extraction process is more complicated, the production cost is higher, and the residue after extracting neem can not be fully utilized.

After retrieval, there is no report on the use of neem to directly produce nitrification inhibitors in my country, and there is no relevant report on the use of neem seeds to produce bio-fertilizers.