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| Effects of Rice Cultivars on CH4 and N2O Emissions from Rice Fields |
| Received:March 23, 2015 |
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| KeyWord:rice cultivar;CH4;N2O;rice grain yield;water-saving and drought-resistant rice cultivar |
| Author Name | Affiliation | E-mail | | SUN Hui-feng | Eco-Environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
Shanghai Engineering Research Center of Low-carbon Agriculture, Shanghai 201415, China | | | ZHOU Sheng | Eco-Environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
Shanghai Engineering Research Center of Low-carbon Agriculture, Shanghai 201415, China | zhous@263.net | | CHEN Gui-fa | Eco-Environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
Shanghai Engineering Research Center of Low-carbon Agriculture, Shanghai 201415, China | | | FU Zi-shi | Eco-Environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
Shanghai Engineering Research Center of Low-carbon Agriculture, Shanghai 201415, China | | | LIU Guo-lan | Shanghai Agrobiological Gene Center, Shanghai 201106, China | | | SONG Xiang-fu | Eco-Environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
Shanghai Engineering Research Center of Low-carbon Agriculture, Shanghai 201415, China | |
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| Abstract: |
| Rice cultivation is an important source of methane(CH4) and nitrous oxide(N2O), major components of greenhouse gases(GHG). Different rice cultivars may have different GHG emission potentials. In this study, 16 rice cultivars that are currently widely planted in Taihu Lake region were selected to evaluate their CH4 and N2O emissions. Results showed that a significant positive linear relationship was observed between rice grain yield and seasonal cumulative CH4 emissions. Under conventional irrigation conditions, seasonal cumulative CH4 and N2O emissions and grain yield were higher for japonica cultivars than for indica ones. In comparison with conventional rice cultivars, hybrid rice cultivars showed higher seasonal cumulative CH4 emissions and grain yield, but lower N2O emissions. Cultivars with high yield and low GHG emissions were Zaoyuxiangjing and Xiushui 134 of conventional japonica cultivars, Huayou 14, Qiuyoujinfeng, and Yongyou 9 of hybrid japonica cultivars, and Hanyou 113 and Tianyouhuazhan of hybrid indica cultivars. Furthermore, Zaoyuxiangjing, Hanyou 8 and Hanyou 113 were drought-resistant and would perform better than others under water shortage environments. |
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