Saccharomycetes plays an important role in the elimination of organochlorine pesticides. At present, a variety of degradation strains have been isolated. Using HCH as the sole carbon source, three strains of Bacillus, Achromobacter and Pseudomonas were obtained successively. The degradation rates of total HCH were 59.6%, 56.9% and 56% respectively, and the degradation rates of HCH were 55.9%, 57.6% and 56.9% respectively. Some experts screened a strain of oligotrophic Monas D1 from DDT contaminated soil, and its degradation rate of DDT degradation for 10 days was 69%. The research shows that using saccharomycetes technology to repair polluted soil is an effective method. Saccharomycetes is rich in resources, diverse metabolic pathways and relatively mature operation methods, which makes it have great potential to repair multiple polluted soil. Saccharomycetes degradation is an important way to eliminate herbicide pollution. Its main reactions include dehalogenation, dealkylation, hydrolysis, oxidation, cyclohydroxylation and cracking, nitro reduction and conjugation. The microbial degradation characteristics of acetochlor in black soil environment were studied. The results showed that the activity of saccharomycetes was the main factor affecting the degradation of acetochlor, and bacteria had stronger degradation ability than fungi; Fungi have stronger tolerance to acetochlor. In the whole culture process after acetochlor application, the amount of phospholipid fatty acids, the soil fungal marker, is always lower than the control, indicating that the inhibition of Acetochlor on fungi may be long-term and irreversible. In addition, herbicides such as acetochlor have a great impact on soil saccharomycetes such as Rhizobium and arbuscular mycorrhizal fungi, which may inhibit the formation of mycorrhizal and nodule.
Saccharomycetes can improve the physical and chemical properties of soil
Compared with the application of organic fertilizer and chemical fertilizer, the use of enzyme bacterial fertilizer has improved the physical properties such as soil bulk density, water and void in the cultivated layer, which is generally manifested in the decrease of soil bulk density and the increase of porosity.
Saccharomycetes can improve soil activity
The soil enzyme activity of saccharomycetes was significantly higher than that of chemical fertilizer, and the soil enzyme activity increased with the increase of saccharomycetes dosage
Saccharomycetes is the metabolite of biocontrol bacteria in soil. It is rich in indoleacetic acid, gibberellin, cytokinin, nucleotide and other nutrients, which is conducive to the growth of plant roots and aboveground parts.
Saccharomycetes can improve the number of capillary roots and the ability of roots to absorb nutrients, promote plant growth, and significantly improve the ability of crops to resist drought and cold, take root, raise seedlings, protect flowers and fruits, promote fruit expansion and improve crop quality.
Post time: Dec-03-2021