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| Evaluating water management plan of winter wheat in waterlogging conditions based on entropy weighted TOPSIS model |
| MIAO Zimei1, LI Jingchun1*, CHEN Dong2 |
| 1.School of Agricultural Equipment Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Huai′an Water Investigation, Design and Research Co. Ltd., Huai′an, Jiangsu 223005, China |
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Abstract In order to select the unified water level control scheme based on resources, environments and benefits, different irrigation and drainage schemes were developed to simulate the waterlogging stress of winter wheat at different growth stages. Entropy weight method and TOPSIS model were orga-nically combined, and four indicators were selected from three aspects, of high yield of winter wheat, efficient utilization of water resources, and reduction of non-point source pollution, to build a winter wheat water level management evaluation system. The weight of each index was determined by entropy weight method, and 13 different water level management schemes were calculated by using TOPSIS model. The theoretical fit Si of each treatment was obtained, and the effects of waterlogging stress on the water level management schemes were evaluated. According to the calculation results of the model, winter wheat was most affected by waterlogging at the milk-200 mm(3 d)(5 d-800 mm), resulting in a significant decrease in yield. At the tillering stage of-50 mm(1 d)(5 d-200 mm), the winter wheat yield, water saving and emission reduction can be achieved. The results accord with experimental law and are of certain practical value.
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Received: 24 October 2017
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