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Contribution of root respiration to soil respiration in a rape (Brassica campestris L.) field in Southwest China

Author

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  • Q. Hao

    (Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), College of Resources and Environment, Southwest University, Chongqing, P.R. China)

  • C. Jiang

    (Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), College of Resources and Environment, Southwest University, Chongqing, P.R. China)

Abstract

This study aimed to separate the respective contributions of root and microbial respiration to soil respiration in a rape field in Southwest China. The soil respiration was measured with a closed chamber technique and a regression method was used to apportion root and microbial respiration. Microbial and root respiration ranged from 70.67 to 183.77 mg CO2/m2/h and 21.99 to 193.09 mg CO2/m2/h, averaged 127.16 and 116.66 mg CO2/m2/h during the rape growing season, respectively. Root respiration coefficient ranged from 0.41 to 5.39 mg C-CO2/g C/h and was negatively correlated with root/shoot ratio, aboveground and belowground biomass, but positively correlated with root N content. The contribution of root respiration to soil respiration averaged 44.2%, ranging from 14.5% to 62.62%.

Suggested Citation

  • Q. Hao & C. Jiang, 2014. "Contribution of root respiration to soil respiration in a rape (Brassica campestris L.) field in Southwest China," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 60(1), pages 8-14.
    • Handle: RePEc:caa:jnlpse:v:60:y:2014:i:1:id:425-2013-pse
    DOI: 10.17221/425/2013-PSE
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    References listed on IDEAS

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    1. Peter Högberg & Anders Nordgren & Nina Buchmann & Andrew F. S. Taylor & Alf Ekblad & Mona N. Högberg & Gert Nyberg & Mikaell Ottosson-Löfvenius & David J. Read, 2001. "Large-scale forest girdling shows that current photosynthesis drives soil respiration," Nature, Nature, vol. 411(6839), pages 789-792, June.
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