摘要
通过农田水位的调节,制定了不同排灌方案,模拟了水稻不同生育期旱涝交替胁迫的状况。运用熵权法计算了产量、生长、水资源利用3大方面10项指标的权重,TOPSIS法计算了各个解与理想解的相对贴合度,从而评价了各个排灌方案受到旱涝交替胁迫的影响。根据模型计算结果得出,先旱后涝对水稻生育的影响大于先涝后旱的影响.并且旱涝交替胁迫在拔节孕穗期对水稻生育影响程度最大,在后两个生育期的影响依次减弱。结果符合试验规律,有一定实践价值。
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.
作者
曹睿哲
俞双恩
高世凯
郭蓉
王梅
张逸迪
王姣
CAO Rui-zhe YU Shuang-en GAO Shi-kai GUO Rong WANG Mei ZHANG Yi-di WANG Jiao(Key Laboratory of High-efficient Irrigation and Drainage and Agricultural Water and Soil Environment in South China, Ministry of Education, Hohai University, Nanjing 210098, China College of Water Conservancy and Hydropower, Hohai University, Nanjing 210098, China)
出处
《中国农村水利水电》
北大核心
2017年第3期45-49,共5页
China Rural Water and Hydropower
基金
国家自然科学基金项目"农田水位调控下水稻旱涝交替胁迫机理
稻田氮磷流失规律及节水控污灌排模式"(51479063)
关键词
权重计算
客观赋权法
熵权法
TOPSIS法
旱涝交替胁迫
控制灌排
weighting calculation
objective weighting method
entropy method
TOPSIS method
alternating stress of drought and waterlogging
controlled irrigation and drainage
