Tillage practices and straw-returning methods affect topsoil bacterial community and organic C under a rice-wheat cropping system in central China.

ABSTRACT: The objective of this study was to investigate how the relationships between bacterial communities and organic C (SOC) in topsoil (0-5 cm) are affected by tillage practices [conventional intensive tillage (CT) or no-tillage (NT)] and straw-returning methods [crop straw returning (S) or removal (NS)] under a rice-wheat rotation in central China. Soil bacterial communities were determined by high-throughput sequencing technology. After two cycles of annual rice-wheat rotation, compared with CT treatments, NT treatments generally had significantly more bacterial genera and monounsaturated fatty acids/saturated fatty acids (MUFA/STFA), but a decreased gram-positive bacteria/gram-negative bacteria ratio (G(+)/G(-)). S treatments had significantly more bacterial genera and MUFA/STFA, but had dec

SUBMITTER: Guo L 

PROVIDER: S-EPMC5017303 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature