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Autotrophic and heterotrophic components of soil respiration caused by rhizosphere priming effects in a plantation

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  • Wenchen SONG

    (College of Forestry, Beijing Forestry University, Beijing, P.R. China)

  • Xiaojuan TONG

    (College of Forestry, Beijing Forestry University, Beijing, P.R. China)

  • Jinsong ZHANG

    (Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, P.R. China)

  • Ping MENG

    (Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, P.R. China)

  • Jun LI

    (Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, P.R. China)

Abstract

Root-exudate inputs can stimulate the decomposition of soil organic carbon by priming microbial activity, but its ecological significance is still not fully understood. This study evaluated autotrophic respiration and heterotrophic respiration driven by roots using the 13C natural abundance method in a Robinia pseudoacacia plantation. The results showed that the priming effect existed in deep soil of the plantation. The proportions of autotrophic respiration and heterotrophic respiration deriving from priming effect to total soil respiration varied with soil depth. Rhizomicrobial respiration (RMR) accounted for about 15% of the total soil respiration, and the rate of priming decomposition of soil organic matter (PSOM) was only about 5% of the total soil respiration. RMR was significantly positively correlated with PSOM. Heterotrophic respiration derived by the priming effect was too weak to have a positive impact on atmospheric CO2.

Suggested Citation

  • Wenchen SONG & Xiaojuan TONG & Jinsong ZHANG & Ping MENG & Jun LI, 2017. "Autotrophic and heterotrophic components of soil respiration caused by rhizosphere priming effects in a plantation," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 63(7), pages 295-299.
    • Handle: RePEc:caa:jnlpse:v:63:y:2017:i:7:id:233-2017-pse
    DOI: 10.17221/233/2017-PSE
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    References listed on IDEAS

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    1. Andrew C Parnell & Richard Inger & Stuart Bearhop & Andrew L Jackson, 2010. "Source Partitioning Using Stable Isotopes: Coping with Too Much Variation," PLOS ONE, Public Library of Science, vol. 5(3), pages 1-5, March.
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    Cited by:

    1. Xinming Jiang & Xu Yan & Shuyan Liu & Lili Fu & Xiaomei Gao & Dongyan Huang, 2024. "Nitrogen Addition Decreased Respiration and Heterotrophic Respiration but Increased Autotrophic Respiration in a Cabbage ( Brassica pekinensis Rupr) Experiment in the Northeast Plains," Agriculture, MDPI, vol. 14(4), pages 1-14, April.

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