| 南方双季稻区不同复种方式对稻田综合温室效应的影响 |
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| 引用本文： | 伍思平,眭锋,肖小军,张俊,吴自明,曾勇军,黄山.南方双季稻区不同复种方式对稻田综合温室效应的影响[J].核农学报,2020,34(2):376-382. |
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| 作者姓名： | 伍思平 眭锋 肖小军 张俊 吴自明 曾勇军 黄山 |
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| 作者单位： | 1江西农业大学教育部/江西省作物生理生态与遗传育种重点实验室,江西 南昌 330045; 2江西省红壤研究所/国家红壤改良工程技术研究中心/农业农村部江西耕地保育科学观测实验站,江西 南昌 331717; 3中国农业科学院作物科学研究所,北京 100081 |
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| 基金项目： | 江西省重点研发项目;公益性行业(农业)科研专项;国家重点研发计划 |
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| 摘 要： | 为明确南方双季稻区不同复种方式对稻田综合温室效应和温室气体排放强度的影响,试验设置油菜-一季中稻(R-MR)、冬季绿肥(紫云英)-早稻-晚稻(GM-ER-LR)、冬闲-早稻-晚稻(WF-ER-LR)3个处理,采用静态暗箱-气相色谱法监测周年温室气体排放,探明不同复种方式对周年作物产量、稻田全球增温潜势(GWP)、籽粒能量产出(GEY)和全球增温潜势强度(GWPI)的影响。结果表明,与R-MR相比,GM-ER-LR和WF-ER-LR显著增加了CH4累积排放量(分别提高1.27倍和1.18倍),显著降低了N2O累积排放总量(分别降低34.1%和49.4%),GM-ER-LR和WF-ER-LR的CH4和N2O累积排放量无显著差异。与R-MR相比,GM-ER-LR和 WF-ER-LR显著提高了周年GEY(分别提高28.6%和27.0%)。在100年时间尺度上,GM-ER-LR和WF-ER-LR的稻田GWP分别是R-MR的1.27倍和1.18倍,GWPI分别较R-MR提高100%和50%。因此,GM-ER-LR和WF-ER-LR有利于提高作物产量,但会增加稻田综合温室效应和温室气体排放强度。鉴于双季稻区中稻面积有增大的趋势,综合环境效益和经济效益,油菜-一季中稻减排增效效果更好。
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| 关 键 词： | 复种方式 双季稻 排放通量 综合温室效应 全球增温潜势强度 |
| 收稿时间： | 2019-01-07 |
Effects of Different Multiple Cropping Pattern on the Global Warming Potential in Southern Double Cropping Rice Fields |
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| WU Siping,SUI Feng,XIAO Xiaojun,ZHANG Jun,WU Ziming,ZENG Yongjun,HUANG Shan.Effects of Different Multiple Cropping Pattern on the Global Warming Potential in Southern Double Cropping Rice Fields[J].Acta Agriculturae Nucleatae Sinica,2020,34(2):376-382. |
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| Authors: | WU Siping SUI Feng XIAO Xiaojun ZHANG Jun WU Ziming ZENG Yongjun HUANG Shan |
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| Abstract: | To examine effect of different multiple cropping pattern on the global warming potential and greenhouse gas intensity in the double cropping rice fields, the experiment was set up to rapeseed-middle rice rotation (R-MR), green manure (milk vetch)-early rice-late rice rotation (GM-ER-LR), and winter fallow-early rice-late rice rotation (WF-ER-LR). The different cropping patterns for annual crop yield rice field global warming potential(GWP), grain energy yield(GEY) and global warming potential(GWPI) were identified by the static opaque chamber -gas chromatography method. The results showed that compared to R-MR, the CH4 emissions of GM-ER-LR and WF-ER-LR significantly increased by 1.27 and 1.18 times, respectively, whereas N2O emissions were significantly reduced by 34.1% and 49.4%, respectively. No significant differences were found in CH4 and N2O emissions between GM-ER-LR and WF-ER-LR. Compared with R-MR, the grain energy yield significantly increased by28.6% and 27.0%in GM-ER-LR and WF-ER-LR, respectively. The global warming potential was 1.27 and 1.18 folds higher in GM-ER-LR and WF-ER-LR than in R-MR. The global warming potential intensity increased by 100% in GM-ER-LR and 50% in WF-ER-LR than in R-MR. Therefore, GM-ER-LR and WF-ER-LR were beneficial to enhance crop yield, but increased the global warming potential and greenhouse gas intensity. Thus, this study suggested that the rapeseed-middle rice rotation system could not only reduce greenhouse gas emissions but achieve higher environmental and economic benefits. |
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| Keywords: | multiple cropping pattern double rice-cropping system greenhouse gases flux global warming potential global warming potential intensity |
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