Integrated assessment of water footprint and energy production efficiency in different rice-rape rotation systems
Integrated assessment of water footprint and energy production efficiency in different rice-rape rotation systems
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DOI：
10.1016/j.energy.2022.126535
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发表时间：
2022-12
期刊：
影响因子：
9
通讯作者：
Zhaoqiang Jin;Wanjie Liao;Yixue Mu;Yusheng Li;Lixiao Nie
中科院分区：
文献类型：
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作者：
Zhaoqiang Jin;Wanjie Liao;Yixue Mu;Yusheng Li;Lixiao Nie
水稻-油菜轮作是中国最重要的农业生产制度之一。对6种水稻-油菜轮作系统的水分足迹(WF)和能量生产效率(EPE)进行了研究。结果表明，湿法直播稻-油菜轮作制的年当量产量高于旱直播稻-油菜轮作制和插秧稻-油菜轮作制。然而，旱作直播油菜(DDR-DR)轮作系统的总能量输入和WF低于其他水稻-油菜轮作系统，而能量生产效率(EPE)高于其他水稻-油菜轮作系统。减少水稻-油菜轮作系统总能量投入的关键是减少稻季的水氮投入和耕作强度，减少油菜季的氮肥用量。综上所述，湿直播稻直播油菜(WDR-DR)轮作制适合在灌溉条件好、劳动力短缺的稻-油轮作产区推广，而DDR-DR轮作可能是灌溉条件较差、劳动力短缺的稻-油轮作产区的首选种植模式。
Rice-rape rotation is one of the most important agricultural production systems in China. Studies were conducted to assess the water footprint (WF) and energy production efficiency (EPE) of six rice-rape rotation systems. Results showed that the annual equivalent yield in the wet directly seeded rice-rape rotation system was higher than that in the dry directly seeded rice-rape and transplanted rice-rape rotation system. However, the total energy input, and WF in the dry directly seeded rice-directly seeded rape (DDR-DR) rotation system were lower than those in other rice-rape rotation systems, while the energy production efficiency (EPE) was higher than that in other rice-rape rotation systems. The key to reducing the total energy input in the rice-rape rotation system is to reduce water and nitrogen inputs and tillage intensity during rice season and the nitrogen fertilizer rate in rape season. In summary, the wet directly seeded rice-directly seeded rape (WDR-DR) rotation system is suitable for promotion in rice-rape rotation production areas with good irrigation conditions and labor shortages, while the DDR-DR rotation might be the preferred planting mode for rice-rape rotation production areas with poor irrigation conditions and labor shortages.