Selenium-rich bio-fertilizer with sustained release function and preparation method thereof

Abstract

The invention discloses selenium-rich bio-fertilizer with a sustained release function and a preparation method thereof. The selenium-rich bio-fertilizer comprises, by weight, 280-300 parts of fertilizer body, biological microbial agents, 18-20 parts of functional carrier and auxiliary materials, wherein the biological microbial agents comprise, by weight, 0.08-0.09 part of Bacillus thuringiensis,0.1-0.15 part of Paenibacillus polymyxa, 0.2-0.25 part of Azotobacter chroococcum, 0.05-0.07 part of Bacillus subtitles, 0.1-0.15 part of Lactobacillus acidophilus, 0.1-0.15 part of Lactobacillus bulgaricus and 0.1-0.15 part of Streptococcus thermophilus; the functional carrier is prepared by mixing zeolite, charcoal, diatomite, sepiolite and bentonite according to the mass ratio of 3:1:1:2:1; the auxiliary materials comprise, by weight, 0.1-0.2 part of polyglutamic acid, 5-6 parts of potato powder, 0.1-0.2 part of humic acid, 5-6 parts of volvariella volvacea, 4-5 parts of garlic, 8-10 partsof pleurotus ostreatus, 4-5 parts of puffball, 5-6 parts of auricularia auricular and 12-13 parts of selenium ore. The selenium-rich bio-fertilizer and the preparation method thereof have the advantages that aiming at the feature that the absorption efficiency of vegetables or fruits to inorganic selenium is low, the selenium ore is ground into powder and prepared into a solution and a culture medium to culture fermentation fungi so as to obtain the fertilizer which can be well absorbed by plants, and the selenium content of the planted vegetables and fruits is increased.

Description

technical field [0001] The invention relates to the technical field of biological fertilizers, more specifically, the invention relates to a selenium-enriched biological fertilizer with a slow-release function and a preparation method thereof. Background technique [0002] Selenium has antioxidant effects, can enhance human immunity, has the effect of antagonizing harmful heavy metals, and anti-cancer effects. China is a big selenium-deficient country, and medium and large cities in North China, Northeast China, and Northwest China are all selenium-deficient areas. How to supplement selenium correctly and effectively has become a major problem. [0003] The human body mainly obtains selenium from plant or animal food, among which, plant selenium content is high and easily absorbed by the human body, which is the best source of selenium supplementation. The selenium content of grains grown by conventional methods is limited, and special selenium-containing fertilizers must b...

AI Technical Summary

Problems solved by technology

[0004] At present, selenium-enriched rice, selenium-enriched dragon fruit, selenium-enriched tea and other products are common, but the absorption rate of inorganic selenium by plants such as rice, dragon fruit and tea trees is not high, far less than that of fermented strains or edible fungi. Absorption conversion rate of bacteria