摘要
以灌溉日期和灌溉水量为决策变量,结合豫东地区多年降水资料和玉米在各生育期耗水量等条件,实现多年作物产量的均值最大、方差最小以及玉米生育期总灌水量最小的目标优化。结果表明在拔节期至抽雄期、抽雄期至灌浆期进行两次灌水,灌水定额分别为85和75 mm,可以使相对产量达到98.2%,并且方差数量级达到10^(-5),证明优化后的灌溉制度在当地有较强的适应性。
In this paper, irrigating date and irrigation quantity are used as decision variables, combined with the multi-year precipitation data and the water consumption of maize in the growth period, the optimization is conducted with the optimal target of the maximum average value and the minimum variance of multi-year crop yield and the minimum total irrigation amount in maize growth period. The resuhs show that： under the condition of two irrigation times and the irrigation amount of 85 mm and 75 mm at jointing stage to tasselling stage, from tasselling stage to grain filling stage, respectively, the relative yield can reach 98.2% and the variance order can reach 10-5, which proves that the optimized irrigation schedule has strong adaptability in the study area.
出处
《节水灌溉》
北大核心
2017年第11期38-41,共4页
Water Saving Irrigation
关键词
夏玉米
灌溉制度
多年降水
多目标优化
summer maize
irrigation schedules
multi-year precipitation
multi-objective optimization
