In order to simulate rice growth under alternating stress of drought and waterlogging,different irrigation plans are formulated by regulating farmland water. The weights of 3 categories and 10 indexes are calculated by entropy weight method. TOPSIS method is used to calculate the relative fit,and the irrigation plans affected by drought alternating stress is calculated. According to the calculated results of the model,the effect of waterlogging after droughts on rice growth is greater than the droughts after waterlogging. The jointing and booting stages are greatly influenced by alternating stress of drought and waterlogging,and the other two growth periods are weakened in turn. Results accord with the experimental rules and it has a certain practical value.
Key words
weighting calculation /
objective weighting method /
entropy method /
TOPSIS method /
alternating stress of drought and waterlogging /
controlled irrigation and drainage
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