Selenium-rich chitosan nutritional microbial fertilizer and preparation method thereof

Abstract

The invention relates to a selenium-rich chitosan nutritional microbial fertilizer. The selenium-rich chitosan nutritional microbial fertilizer is prepared from the following raw materials: sodium selenite, chitosan hydrolysate, compound trace elements, monopotassium phosphate, urea, peptone, yeast powder, NaCl, NaOH, NaNO3, NaCl, NH4Cl, K2HPO4, a beef extract, glucose, starch, calcium carbonate, amino acid, potassium nitrate, ferrous sulfate, magnesium sulfate, trisodium citrate, biochemical enzymes and a mixed bacterium liquid. Due to addition of the chitosan, the viable count of a microbial agent can be kept; the efficacy of the chitosan for keeping the viable count is put into an effective play; due to addition of the chitosan, the amount of bacteria of the microbial agent can reach 20,000,000,000 / mL; due to addition of the chitosan to a bacterial manure, the yield of commercial crops can also be increased by 10%-15%; and the nutritional microbial fertilizer has the efficacies of keeping moisture and slowly releasing fertilizer efficiency.

Description

technical field [0001] The invention relates to a selenium-enriched nutritional microbial fertilizer, in particular to a selenium-enriched chitosan nutritional microbial fertilizer and a preparation method thereof, belonging to the technical field of biological fertilizers. Background technique [0002] my country is a big selenium-deficient country. The census proves that more than 70% of the soil in our country is seriously deficient in selenium, and the selenium content in more than 95% of the grain and livestock and poultry meat in our country is less than 50 μg / kg, which belongs to a large selenium-deficient country. The per capita selenium intake in my country is only about 39 μg per day, which is less than 80% of the minimum adult requirement of 50 μg / day for success, and is far from the healthy requirement of 100-200 μg / day; it is farther away from the safe upper limit of 800 μg. In my country, except for a few areas, 90% of the population needs to use bioengineerin...

AI Technical Summary

Problems solved by technology

But selenium exists in the form of inorganic selenium salt in this selenium-enriched preparation, and the biological activity of inorganic selenium salt is low, does not have antioxidation, and human body is very little to the absorption rate of inorganic selenium salt, and excessive consumption has certain toxicity to human body, has increased the harm to human body. Hazardous

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