Selenium-rich biological agent for improving activity of microbes in soil and preparation method of selenium-rich biological agent

Abstract

The invention relates to a selenium-rich biological agent for improving the activity of microbes in soil. The selenium-rich biological agent comprises the following raw materials: 8-15 parts of sodium selenite, 5-15 parts of compound trace elements, 8-20 parts of monopotassium phosphate, 10-25 parts of urea, 8-20 parts of peptone, 4-10 parts of yeast powder, 8-20 parts of NaCl, 8-15 parts of NaOH, 4-10 parts of NaNO3, 10-25 parts of NaCl, 4-10 parts of NH4Cl, 8-20 parts of K2HPO4, 4-10 parts of a beef extract, 10-25 parts of glucose, 10-25 parts of starch, 8-20 parts of calcium carbonate, 10-25 parts of amino acid, 2-6 parts of potassium nitrate, 2-6 parts of ferrous sulfate, 10-25 parts of magnesium sulfate, 25-40 parts of trisodium citrate, 10-25 parts of enzymes and 800-896 parts of excess activated sludge. The selenium-rich biological agent adopts excess activated sludge produced by treatment of domestic sewage, so that not only is the fermentation speed of the selenium-rich biological agent increased, but also the particle diameters of selenium nano-particles are more uniform, and absorption of the selenium-rich biological agent by plants is benefitted.

Description

technical field [0001] The invention relates to a selenium-enriched nutritional microbial preparation, in particular to a selenium-enriched biological preparation for improving microbial activity in soil and a preparation method, 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 us...

AI Technical Summary

Problems solved by technology

[0007] Sludge is a by-product of sewage treatment, usually accounting for 0.3%-0.5% (volume) of sewage or about 1%-2% (quality) of sewage treatment. Generally, the sludge produced by urban sewage treatment plants is about About 0.5% of the volume of treated water, such a large amount of sludge, if not properly disposed of, will become a serious environmental pollution problem

However, the current situation in our country is that the vast majority of sludge is directly discarded, landfilled, or abused by farmers on farmland without treatment, causing secondary pollution to the environment. Therefore, it will be of great importance to find effective sludge treatment and disposal methods. economic and environmental connotations