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HERO ID
6968479
Reference Type
Journal Article
Title
Microbial community assembly and metabolic function during wheat straw decomposition under different nitrogen fertilization treatments
Author(s)
Zhong, Y; Liu, Jin; Jia, X; Shangguan, Z; Wang, R; Yan, W; ,
Year
2020
Is Peer Reviewed?
Yes
Journal
Biology and Fertility of Soils
ISSN:
0178-2762
EISSN:
1432-0789
Publisher
SPRINGER
Location
NEW YORK
Page Numbers
697-710
DOI
10.1007/s00374-020-01438-z
Web of Science Id
WOS:000517700800001
Abstract
In-depth microbial community characterization, a community-level metabolic function analysis, and biogeochemical assessments of residues were performed to understand the principles governing microbial community assembly in wheat straw during decomposition with different N fertilization rates in soil. We identified a suite of decomposition-associated bacterial and fungal groups in straw that contribute to C and N cycling. The decomposition-associated microbial community in straw is likely mainly derived from the original straw, and the bacterial and fungal communities showed different patterns along with the decomposition. Overall, the microbial community composition and function were not substantially affected by the N fertilization rate, but N fertilization significantly increased the straw microbial assembly speed and had significant effects on the abundances of certain taxa and C- and N-related genes, leading to different decomposition rates of straw under different N fertilization rates. Furthermore, the straw quality, especially dissolved organic C (DOC) and lignin, accounted for most observed effects on microbial community development and decomposition. The results provide new insight into the roles of the microbial community in straw during crop residue decomposition for nutrient cycling in farmland ecosystems.
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