Comparing bacterial dynamics for the conversion of organics and humus components during manure composting from different sources

Frontiers in Microbiology

Microbiology

Yan Li¹  Renyue Wei²  Yuan Chang³  Ruoqi Li³  Jun Li³  Yuquan Wei³  Kaiyun Zhou³  Yabin Zhan⁴ 

[1] Central Laboratory, Haikou Affiliated Hospital of Central South University Xiangya School of Medicine, Haikou, China;Haikou City Key Laboratory of Clinical Medicine, Haikou, China;Key Laboratory of Tropical Biological Resources, Ministry of Education, Key Laboratory for Marine Drugs of Haikou, Hainan University, Haikou, China;College of Life Science, Northeast Agricultural University, Harbin, China;College of Resources and Environmental Science, Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, China;Organic Recycling Institute (Suzhou) of China Agricultural University, Suzhou, China;College of Resources and Environmental Science, Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, China;Organic Recycling Institute (Suzhou) of China Agricultural University, Suzhou, China;Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan, Hubei, China;

关键词: manure composting;    organic components degradation;    humification index;    bacterial community;    humus carbon and nitrogen;   

DOI  :  10.3389/fmicb.2023.1281633

 received in 2023-08-22, accepted in 2023-09-15,  发布年份 2023

来源: Frontiers

【 摘 要 】

The study aimed to compare the differences in organic fractions transformation, humus components and bacterial community dynamics during manure composting from different sources, and to identify the key biotic and abiotic factors driving the humification process. Five types of manure [pig manure (PM), cow dung (CD), sheep manure (SM), chicken manure (CM), and duck manure (DM)] were used as raw materials for 30 days composting. The results showed the obvious difference of organic fractions decomposition with more cellulose degradation in CD and SM composting and more hemicellulose degradation in PM and CM composting. Composting of PM and CD contained significantly higher humus fractions than the other composts. Fluorescence spectra indicated that SM composting tended to form structurally stable humic acid fractions, while CM and DM tended to form structurally complex fulvic acid fractions. Pearson correlation analysis showed that humification process of composts in category A (PM, CD) with higher humification degree than category B (SM, CM, and DM) was positively correlated with lignin and hemicellulose degradation. Bioinformatics analysis found that Lysinibacillus promoted the degradation of hemicellulose and the conversion of fulvic to humic acid in the composts of category A, and in category B, Thermobifida, Lactobacillus, and Ureibacillus were key genera for humic acid formation. Network analysis indicated that bacterial interaction patterns had obvious differences in composting with different humus and humification levels.

【 授权许可】

Unknown   
Copyright © 2023 Li, Li, Chang, Li, Zhou, Zhan, Wei and Wei.