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A Full-Scale Optimization of a Crop Spatial Planting Structure and its Associated Effects

Engineering 2023年第9期28卷 139-152页

作者： Qi Liu Jun Niu Taisheng Du Shaozhong Kang Center for Agricultural Water Research in China China Agricultural UniversityBeijing 100083China State Key Laboratory of Efficient Utilization of Agricultural Water Resources Beijing 100083China National Field Scientific Observation and Research Station on Efficient Water Use of Oasis Agriculture in Wuwei of Gansu Province Wuwei 733000China Key Laboratory of Agricultural Water Saving of the Ministry of Water Resources Beijing 100083China

Driven by the concept of agricultural sustainable development,crop planting structure optimization(CPSO)has become an effective measure to reduce regional crop water demand,ensure food security,and protect the ***,traditional optimization of crop planting structures often ignores the impact on regional food supply–demand relations and interprovincial food ***,using a system analysis concept and taking virtual water output as the connecting point,this study proposes a theoretical CPSO framework based on a multi-aspect and full-scale evaluation index *** this end,a water footprint(WF)simulation module denoted as soil and water assessment tool–water footprint(SWAT-WF)is constructed to simulate the amount and components of regional crop WFs.A multi-objective spatial CPSO model with the objectives of maximizing the regional economic water productivity(EWP),minimizing the blue water dependency(BWFrate),and minimizing the grey water footprint(GWFgrey)is established to achieve an optimal planting *** various benefits,a fullscale evaluation index system based on region,province,and country scales is *** an entropy weight technique for order preference by similarity to an ideal solution(TOPSIS)comprehensive evaluation model,the optimal plan is selected from a variety of CPSO *** proposed framework is then verified through a case study of the upper–middle reaches of the Heihe River Basin in Gansu province,*** combining the theory of virtual water trading with system analysis,the optimal planting structure is *** sacrificing reasonable regional economic benefits,the optimization of the planting structure significantly improves the regional water resource benefits and ecological benefits at different scales.

关键词： Planting structure optimization Full-scale evaluation index system Water footprint SWAT-WF module interprovincial food trade Entropy weight TOPSIS

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