【摘要】 优化漳卫河平原冬小麦-夏玉米轮作体系的灌溉制度,对进一步深入研究水资源严重短缺的河南省可持续农业的发展具有一定的示范意义。本研究以经过参数率定与模拟验证的SWAT为工具,设置了1种充分灌溉和9种非充分灌溉情形,拟合得到冬小麦和夏玉米的Jensen模型水分生产函数,在此基础上,以不考虑氮磷胁迫的历史灌溉情景为基本情形,设置了3种优化灌溉方案。模拟结果表明:与基本情景相比,轮作体系粮食稳产,平均节约灌溉用水16.13%,水分利用率平均提高3.05%;与相应时段的年鉴统计值和模拟的历史情景下的产量相比,最优情景下全区轮作体系粮食平均增产30.76%和6.47%;与模拟的历史情景相比,优化情景下轮作体系的水分利用率平均提高23.94%。更多还原

【Abstract】 Optimizing the irrigation schedule of winter wheat-summer maize rotation system in Zhangwei river plain has a great significant implication in studying agricultural sustainable development of Henan province which suffered serious shortage of water resources.Based on a calibrated model-SWAT,we set up one full irrigation and nine deficit irrigations to simulate sensitivity index of Jensen model of winter wheat and summer maize.We assumed the historical scenario which under non-stress of N and P as the basic scenario,then three irrigation scenarios were set to optimize it.The results showed in comparison with the base scenario,the yield of rotation system can keep stable,16.13% of the mean irrigation water can be saved and the mean WUE increased by 3.05% under the optimum irrigation regime.Compared with yearbook and historical scenario,the mean yield of rotation system increased by 30.76% and 6.47%,and the mean WUE of rotation system increased by 23.94%.更多还原