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- W3013265966 abstract "Abstract Returning crop residues is a possible practice for balancing soil carbon (C) loss. The turnover rate of organic C from crop residues to soil C is dependent on soil microbial community dynamics. However, the relationship between any temporal changes in the soil microbial community after crop straw inputs and the dynamics of straw-C distribution in the soil organic carbon (SOC) pool remains unclear. The present study investigated the allocation of straw-C into soil dissolved organic carbon (DOC), microbial biomass carbon (MBC), particulate organic carbon (POC) and mineral-associated organic carbon (MaOC) using stable isotope probing, as well as the temporal changes in the soil bacterial and fungal communities using high-throughput sequencing. After the first 180 days of straw decomposition, approximately 3.93% and 19.82% of straw-C was transformed into soil MaOC and POC, respectively, while 0.02% and 2.25% of straw-C was transformed into soil DOC and MBC, respectively. The temporal change of the soil microbial community was positively correlated with the dynamics of straw-C distribution to SOC (R > 0.5, P < 0.05). The copiotrophic bacteria (e.g., Streptomyces , Massilia and Sphingobacterium ), cellulolytic bacteria and fungi (e.g., Dyella and Fusarium , Talaromyces) , acidophilic bacteria (e.g., Edaphobacter and unclassified Acidobacteriaceae ), denitrifying and N-fixing microbes (e.g., Burkholderia-Paraburkholderia , Paraphaeosphaeria and Bradyrhizobium) , and fungi unclassified Sordariomycetes were significantly correlated with straw-C distribution to specific SOC fractions ( P < 0.05), which explained more than 90% of the variation of straw-C allocation into soils. Copiotrophic, certain cellulolytic and denitrifying microbes had positively correlated with DOC- and MaOC-derived from straw, and other cellulolytic fungi (e.g., Talaromyces ) and specific bacteria (e.g. Bradyrhizobium ) were positively correlated with POC-derived from straw. Our results highlight that the temporal change of soil microbial community structure well reflects the conversion and distribution process of straw-C to SOC fractions." @default.
- W3013265966 created "2020-04-03" @default.
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- W3013265966 date "2020-03-26" @default.
- W3013265966 modified "2023-09-27" @default.
- W3013265966 title "Linking soil microbial community dynamics to straw-carbon distribution in soil organic carbon" @default.
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- W3013265966 doi "https://doi.org/10.1038/s41598-020-62198-2" @default.
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