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Effects of Biochar Amendment on CO 2 Emissions from Paddy Fields under Water-Saving Irrigation

Author

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  • Shihong Yang

    (State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China
    College of Agricultural Engineering, Hohai University, Nanjing 210098, China)

  • Zewei Jiang

    (College of Agricultural Engineering, Hohai University, Nanjing 210098, China)

  • Xiao Sun

    (College of Agricultural Engineering, Hohai University, Nanjing 210098, China)

  • Jie Ding

    (College of Agricultural Engineering, Hohai University, Nanjing 210098, China)

  • Junzeng Xu

    (State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China
    College of Agricultural Engineering, Hohai University, Nanjing 210098, China)

Abstract

The role of carbon pool of biochar as a method of long-term C sequestration in global warming mitigation is unclear. A two-year field study was conducted to investigate the seasonal variations of CO 2 emissions from water-saving irrigation paddy fields in response to biochar amendment and irrigation patterns. Three biochar treatments under water-saving irrigation and one biochar treatment under flooding irrigation were studied, and the application rates were 0, 20, 40, and 40 t ha −1 and labeled as CI + NB (controlled irrigation and none biochar added), CI + MB (controlled irrigation and medium biochar added), CI + HB (controlled irrigation and high biochar added), and FI + HB (flood irrigation and high biochar added), respectively. Results showed that biochar application at medium rates (20 t ha −1 ) decreased CO 2 emissions by 1.64–8.83% in rice paddy fields under water-saving irrigation, compared with the non-amendment treatment. However, the CO 2 emissions from paddy fields increased by 4.39–5.43% in the CI + HB treatment, compared with CI + NB. Furthermore, the mean CO 2 emissions from paddy fields under water-saving irrigation decreased by 2.22% compared with flood irrigation under the same amount of biochar application (40 t ha −1 ). Biochar amendment increased rice yield and water use efficiency by 9.35–36.30% and 15.1–42.5%, respectively, when combined with water-saving irrigation. The CO 2 emissions were reduced in the CI + MB treatment, which then increased rice yield. The CO 2 emissions from paddy fields were positively correlated with temperature. The highest value of the temperature sensitivity coefficient (Q 10 ) was derived for the CI + MB treatment. The Q 10 was higher under water-saving irrigation compared with flooding irrigation.

Suggested Citation

  • Shihong Yang & Zewei Jiang & Xiao Sun & Jie Ding & Junzeng Xu, 2018. "Effects of Biochar Amendment on CO 2 Emissions from Paddy Fields under Water-Saving Irrigation," IJERPH, MDPI, vol. 15(11), pages 1-12, November.
    • Handle: RePEc:gam:jijerp:v:15:y:2018:i:11:p:2580-:d:183694
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    References listed on IDEAS

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    1. Chih-Chun Kung & Bruce A. McCarl & Chi-Chung Chen, 2014. "An Environmental and Economic Evaluation of Pyrolysis for Energy Generation in Taiwan with Endogenous Land Greenhouse Gases Emissions," IJERPH, MDPI, vol. 11(3), pages 1-19, March.
    2. Uwe A. Schneider & Pete Smith, 2008. "Greenhouse Gas Emission Mitigation and Emission Intensities in Agriculture," Working Papers FNU-164, Research unit Sustainability and Global Change, Hamburg University, revised Jul 2008.
    3. Li, Y. H., 2001. "Research and practice of water saving irrigation for rice in China," Conference Papers h027868, International Water Management Institute.
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    1. Dongyang Xiao & Haipeng Niu & Jin Guo & Suxia Zhao & Liangxin Fan, 2021. "Carbon Storage Change Analysis and Emission Reduction Suggestions under Land Use Transition: A Case Study of Henan Province, China," IJERPH, MDPI, vol. 18(4), pages 1-17, February.
    2. Xiaoqin Tian & Zhuo Li & Longchang Wang & Yifan Wang & Biao Li & Meichun Duan & Bangyan Liu, 2019. "Effects of Biochar Combined with Nitrogen Fertilizer Reduction on Rapeseed Yield and Soil Aggregate Stability in Upland of Purple Soils," IJERPH, MDPI, vol. 17(1), pages 1-17, December.
    3. Chen, Yu & Zhang, Jian-Hua & Chen, Mo-Xian & Zhu, Fu-Yuan & Song, Tao, 2023. "Optimizing water conservation and utilization with a regulated deficit irrigation strategy in woody crops: A review," Agricultural Water Management, Elsevier, vol. 289(C).
    4. Amar Ali Adam Hamad & Lixiao Ni & Hiba Shaghaleh & Elsayed Elsadek & Yousef Alhaj Hamoud, 2023. "Effect of Carbon Content in Wheat Straw Biochar on N 2 O and CO 2 Emissions and Pakchoi Productivity Under Different Soil Moisture Conditions," Sustainability, MDPI, vol. 15(6), pages 1-16, March.
    5. Yang Liu & Xiaoyu Liu & Ni Ren & Yanfang Feng & Lihong Xue & Linzhang Yang, 2019. "Effect of Pyrochar and Hydrochar on Water Evaporation in Clayey Soil under Greenhouse Cultivation," IJERPH, MDPI, vol. 16(14), pages 1-10, July.

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