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Soil Microbial Community Structure Dynamics Shape the Rhizosphere Priming Effect Patterns in the Paddy Soil by Hao Cui; Pengfei Chen; Chao He; Zhenhui Jiang; Rui Lan; Jingping Yang is a Environmental Science article available to read on EtoBox.

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Microbial community structure plays a crucial part in soil organic carbon (SOC) decomposition and variation of rhizosphere priming effects (RPEs) during plant growth. However, it is still uncertain how bacterial community structure regulates RPEs in soil and how RPE patterns respond to plant growth. Therefore, we conducted an experiment to examine the RPE response to plant growth and nitrogen (N) addition (0 (N0), 150 (N150), and 300 (N300) kg N ha) using the C natural abundance method in a C soil (paddy soil) - C plant (maize, Zea mays L.) system; we then explored the underlying biotic mechanisms using 16S rRNA sequencing techniques. Networks were constructed to identify keystone taxa and to analyze the correlations between network functional modules of bacterial community and C decomposition. The results indicated that negative and positive RPEs occurred on Day 30 and Day 75 after maize planting, respectively. Bacterial community structure significantly changed and tended to shift from r-strategists toward K-strategists with changing labile C: N stoichiometry and soil pH during plant growth stages. The different network modules of bacterial community were aggregated in response t

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Author

Hao Cui; Pengfei Chen; Chao He; Zhenhui Jiang; Rui Lan; Jingping Yang

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Environmental Science (Physical Sciences)