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Characteristics of maize residue decomposition and succession in the bacterial community during decomposition in Northeast China

引用

Journal of Integrative Agriculture 2021年第12期20卷 3289-3298页

作者： ZHAO Shi-cheng Ignacio ACIAMPITTI QIU Shao-jun XU Xin-peng HE Ping Key Laboratory of Plant Nutrition and Fertilizer Ministry of Agriculture and Rural Affairs/lnstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081P.R.China Department of Agronomy Kansas State UniversityManhattanKS 66506USA

Microbes are decomposers of crop residues,and climatic factors and residue composition are known to influence microbial growth and community composition,which in turn regulate residue ***,the succession of the bacterial community during residue decomposition in Northeast China is not well *** clarify the property of bacterial community succession and the corresponding factors regulating this succession,bags containing maize residue were buried in soil in Northeast China in October,and then at different intervals over the next 2 years,samples were analyzed for residue mass and bacterial community *** residue burial in the soil,the cumulative residue mass loss rates were 18,69,and 77%after 5,12,and 24 months,*** release of residue nitrogen,phosphorus,and carbon followed a similar pattern as mass loss,but 79%of residue potassium was released after only 1 *** abundance,richness,and community diversity of bacteria in the residue increased rapidly and peaked after 9 or 20 *** decomposition was mainly influenced by temperature and chemical composition in the early stage,and was influenced by chemical composition in the later *** Actinobacteria,Bacteroidetes,and Firmicutes dominated the bacterial community composition in residue in the early stage,and the abundances of phyla Chloroflexi,Acidobacteria,and Saccharibacteria gradually increased in the later stage of *** conclusion,maize residue decomposition in soil was greatly influenced by temperature and residue composition in Northeast China,and the bacterial community shifted from dominance of copiotrophic populations in the early stage to an increase in oligotrophic populations in the later stage.

关键词： crop residue decomposition bacteria microbial community succession nutrient release climate condition

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