Chitosan oligosaccharides improve soil function

Chitosan oligosaccharides improve soil function

The type of soil microbial population has a significant impact on soil quality and crop growth. Studying the characteristics of the impact of chitosan oligosaccharides on soil microbial populations is helpful for the correct, efficient, and safe use of chitosan oligosaccharides. The experiment utilized an artificial climate chamber for soil cultivation, applying a 60mg • L-1 chitosan solution to the soil and using water (CK) as a control treatment. After 7 days of cultivation, samples were taken and high-throughput sequencing technology was used to analyze the structure and diversity distribution characteristics of soil biological communities

Compared with the CK group, the oligosaccharides treated group accounted for over 86% of the total bacterial population, including Proteobacteria (26.61%~31.03%), Acidobacteria (14.58%~22.97%), Actinobacteria (14.25%~16.84%), Chloroflexia (7.13%~8.30%), and Bacteroidetes (6.84%~7.18%). After treatment with oligosaccharides, the phyla Proteobacteria, Actinobacteria, and Zygomycota increased by 15%, 17%, and 19%, respectively; The relative abundance of soil fungi increased by 295% after treatment with chitosan oligosaccharides, and the soil fungal community structure was significantly improved after treatment with chitosan oligosaccharides.

This study found that oligosaccharides have the highest impact on the abundance of Proteobacteria, Actinobacteria, and Acidobacteria, which contribute to the accumulation of soil nutrients. Actinobacteria play an important role in soil carbon and nitrogen cycling, and can produce spores with strong stress resistance. They also have functions such as phosphorus and potassium solubilization. As the soil environmental carbon content increases, it is also beneficial for the abundance of Actinobacteria to increase.

The research results indicate that chitosan oligosaccharide treatment can significantly increase the abundance of MND1, Bacillus, Nitrospira, Actinomyces, Zygomycota, Sphingomonas, Streptococcus, and Streptomyces. Aspergillus flavus, as a phosphorus solubilizing microorganism, effectively increases the supply of available phosphorus in soil. The use of chitosan oligosaccharides can increase its relative abundance by 199%

Chitosan oligosaccharide treatment can promote the growth of various beneficial bacterial communities that are beneficial to soil nutrients.

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