| Cite this article: | 刘毅,徐宏斌,曾令海,等.华北平原种植制度节水高效多目标综合评价[J].灌溉排水学报,0,():-. |
| Liu Yi,Xu Hongbin,Zeng Linghai,et al.华北平原种植制度节水高效多目标综合评价[J].灌溉排水学报,0,():-. |
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| Multi-Objective Comprehensive Evaluation of Cropping Systems for Water-Saving and High Efficiency in The North China Plain |
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Liu Yi1, Xu Hongbin2, Zeng Linghai2, Dai Jing2, Dong Xinliang3, Sun Hongyong3, Wang Jintao3
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1.Agricultural Science Institute of Nandagang management zone;2.The Fourth Hydrogeological Engineering Geological Brigade of the Geological and Mineral Exploration and Development Bureau of Hebei Province;3.Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, The Chinese Academy of Sciences
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| Abstract: |
| 【Background】The overexploitation of groundwater in the North China Plain (NCP) has triggered serious ecological problems.【Objective】To alleviate the problem of groundwater overexploitation, the irrigation and planting systems in NCP should be adjusted and optimized 【Method】Multiple combinations of evaluation indices, such as GY (grain yield)-GO (groundwater overexploitation amount)-ET (evapotranspiration)-WUE (water use efficiency), GY-GO-BGG (blue water + green water + grey water)-WF (water footprint), GY-GO-BLN (beneficial water uses fraction, water losses fraction, non-beneficial water uses fraction)-WP (water productivity), as well as multiple weighting methods including the Analytic Hierarchy Process, Entropy Weight Method, and Random Forest, were adopted to comprehensively evaluate different irrigation and planting systems. Experiments on different irrigation and planting systems were carried out at the Nanpi Ecological Agriculture Experimental Station of the Chinese Academy of Sciences. The experimental treatments included two irrigation systems, namely, critical period irrigation (CI) and minimum irrigation (MI), and four planting systems, namely, winter wheat-summer maize double cropping in a year (DWM), winter wheat-summer maize-spring maize triple cropping in two years (WMM), winter wheat single cropping in a year (WW), and spring maize single cropping in a year (SM).【Result】The results showed that MI-WMM ranked first under different combinations of evaluation indices and weighting methods. Its annual average GY was 10,291.9 kg hm?2, GO was 0.3 mm, ET was 518.9 mm, WUE was 1.98 kg m?3, BGG was 671.8 mm, WF was 0.653 m3 kg?1, the beneficial water uses fraction was 85.80%, the water losses fraction was 3.88%, the non-beneficial water uses fraction was 14.20%, and WP was 1.78 kg m?3. 【Conclusion】 MI-WMM is the current optimal combination of irrigation and planting system, which can achieve a balance among grain production, groundwater exploitation reduction, water use, and water production performance. At the same time, measures such as choosing high-yield and stress-resistant varieties, optimizing the sowing date, density, and fertilization amount of crops, and using a machine for maize grain harvesting to improve production efficiency should be implemented to increase farmers" enthusiasm for fallow and crop rotation. Meanwhile, based on the ecological healthy groundwater depth and the main needs of the development stage, the priority goals should be clarified, and the planting systems should be dynamically adjusted by comprehensively considering and balancing production and ecological indicators. |
| Key words: Wheat and maize;groundwater Overexploitation;Water consumption;Water use efficiency;Water footprint |
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