沙漠绿洲区不同灌水方式条件下玉米灌溉制度研究

Scheduling Irrigation for Maize under Different Irrigation Methods in Minqin Oasis

在石羊河流域干旱缺水的民勤县连续进行了 4年田间试验 ,研究了大田地膜玉米畦灌、常规沟灌、交替隔沟灌溉和宽垄沟灌 4种灌水方式下的灌溉定额及其对产量和水分利用的影响 ,拟定了不同灌水方式下的灌溉制度 ,得出交替隔沟灌溉方式下灌水 7次 ,次灌水定额为 30 0 m3/hm2 ,灌水时间为拔节期、大喇叭口期、抽雄期、抽穗期、灌浆始、灌浆中、乳熟期的灌溉制度为该地区推荐采用的最优方案。

A field experiment was carried out in 4 years to determine optimal irrigation schedule for maize mulched with plastic film under different irrigation methods, such as border irrigation, conventional furrow irrigation, controlled root divided alternative furrow irrigation (CRAFI) and wide ridge furrow irrigation, in Minqin Oasis of Shiyanghe basin. The effects of irrigation methods and irrigation schedules on yield and water use efficiency of maize were also discussed and analyzed. The best results occurred in the areas irrigated with CRAFI method and with schedule of irrigating 7 times, with irrigation quote of 300 m 3/hm 2 at stage of shooting, big bulge, heading, tasseling, early filling, middle filling and late filling respectively.