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Soil Bacterial Diversity and Potential Functions Are Regulated by Long-Term Conservation Tillage and Straw Mulching

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Relation http://oar.icrisat.org/11516/
https://doi.org/10.3390/microorganisms8060836
doi:10.3390/microorganisms8060836
 
Title Soil Bacterial Diversity and Potential Functions Are Regulated by Long-Term Conservation Tillage and Straw Mulching
 
Creator Liu, C
Li, L
Xie, J
Coulter, J A
Zhang, R
Luo, Z
Cai, L
Wang, L
Gopalakrishnan, S
 
Subject Soil Science
Water Conservation
 
Description Soil physiochemical properties are regulated by cropping practices, but little is known
about how tillage influences soil microbial community diversity and functions. Here, we assessed
soil bacterial community assembly and functional profiles in relation to tillage. Soils, collected in
2018 from a 17‐year field experiment in northwestern China, were analyzed using high‐throughput
sequencing and the PICRUSt approach. The taxonomic diversity of bacterial communities was
dominated primarily by the phyla Proteobacteria (32–56%), Bacteroidetes (12–33%), and Actinobacteria
(17–27%). Alpha diversity (Chao1, Shannon, Simpson, and operational taxonomic unit (OTU)
richness) was highest under no‐tillage with crop residue removed (NT). Crop residue retention on
the soil surface (NTS) or incorporated into soil (TS) promoted the abundance of Proteobacteria by 16
to 74% as compared to conventional tillage (T). Tillage practices mainly affected the pathways of
soil metabolism, genetic information processing, and environmental information processing. Soil
organic C and NH4–N were the principal contributors to the diversity and composition of soil
microbiota, whereas soil pH, total nitrogen, total P, and moisture had little effect. Our results
suggest that long‐term conservation practices with no‐tillage and crop residue retention shape soil
bacterial community composition through modifying soil physicochemical properties and
promoting the metabolic function of soil microbiomes.
 
Publisher MDPI
 
Date 2020-06
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11516/1/Liu%20et%20al.%2C%202020%20published%202%20June%202020.pdf
Liu, C and Li, L and Xie, J and Coulter, J A and Zhang, R and Luo, Z and Cai, L and Wang, L and Gopalakrishnan, S (2020) Soil Bacterial Diversity and Potential Functions Are Regulated by Long-Term Conservation Tillage and Straw Mulching. Microorganisms (TSI), 8 (836). pp. 1-16. ISSN 2076-2607