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Hybrid rice produces a higher yield and emits less methane

Author

Listed:
  • Ping Liao

    (Ministry of Education and Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Agricultural University, Nanchang, P.R. China)

  • Yanni Sun

    (Ministry of Education and Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Agricultural University, Nanchang, P.R. China)

  • Yu Jiang

    (Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Ministry of Agriculture,)

  • Yongjun Zeng

    (Ministry of Education and Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Agricultural University, Nanchang, P.R. China)

  • Ziming Wu

    (Ministry of Education and Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Agricultural University, Nanchang, P.R. China)

  • Shan Huang

    (Ministry of Education and Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Agricultural University, Nanchang, P.R. China)

Abstract

Hybrid rice has a higher yield potential than inbred rice, but the difference in CH4 emissions between the two groups is still unclear, particularly regarding straw incorporation. In the present study, a pot experiment was conducted to examine the difference in CH4 emissions between inbred (Huanghuazhan) (IR) and hybrid (Rongyouhuazhan) (HR) rice cultivars, both with or without straw incorporation in subtropical China. The results showed that HR produced both greater grain yield and biomass than IR. In contrast, when compared with IR, HR reduced the cumulative CH4 emissions by an average of 18.6%. No significant interactions between rice cultivars and straw management on yield or CH4 emissions were found. HR significantly increased the abundance of methanogens and methanotrophs by 38.9% and 93.4% relative to IR, respectively, thereby reducing CH4 concentrations in the soil pore water. Therefore, we suggest that cultivar rice can produce a higher yield and better mitigate CH4 emissions when compared to inbred rice, regardless of the use of straw incorporation.

Suggested Citation

  • Ping Liao & Yanni Sun & Yu Jiang & Yongjun Zeng & Ziming Wu & Shan Huang, 2019. "Hybrid rice produces a higher yield and emits less methane," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 65(11), pages 549-555.
    • Handle: RePEc:caa:jnlpse:v:65:y:2019:i:11:id:330-2019-pse
    DOI: 10.17221/330/2019-PSE
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    References listed on IDEAS

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    1. Zhen LIU & Kai SUN & Bin ZHENG & Qingling DONG & Geng LI & Huifang HAN & Zengjia LI & Tangyuan NING, 2019. "Impacts of straw, biogas slurry, manure and mineral fertilizer applications on several biochemical properties and crop yield in a wheat-maize cropping system," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 65(1), pages 1-8.
    2. Ye Yuan & Xiaoqin Dai & Huimin Wang, 2019. "Fertilization effects on CH4, N2O and CO2 fluxes from a subtropical double rice cropping system," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 65(4), pages 189-197.
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