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针对黄土高原半干旱集雨补灌区气候特征和水资源现状。以玉米为试材,研究了不同水分组合处理对玉米产量的影响。结果表明:集雨补灌3次处理产量为2353.61~3845.62 kg/hm2,增产效果为44.07%~72.01%。在同样补灌水量及灌水次数的情况下,把灌浆期增加的灌水定额转移到拔节期更有利于提高玉米增产效果和集雨补灌效率。将灌浆期多补充7.5 mm的水量调配给拔节期后,使得补灌效率增加2.05 kg/m3。对于灌水2次的处理,将同样的水量补在拔节期后,使得增产效果和补灌效率都有不同程度的提高,增产效果提高12.93%~21.89%,补灌效率提高3.41~4.21 kg/m3。
A Study on Climatic Characteristics and Water Resources Status of Semi - arid Rainwater Harvesting Irrigation Region on the Loess Plateau. Taking corn as test material, the effects of different water treatments on corn yield were studied. The results showed that the yield of three treatments of catchment irrigation was 2353.61 ~ 3845.62 kg / hm2, and the yield increase was 44.07% ~ 72.01%. With the same amount of irrigation water and the number of irrigation, the increase of irrigation quota during the filling stage is more conducive to increasing corn yield and efficiency of catchment and irrigation. After the filling period of 7.5 mm was added to the jointing stage, the filling efficiency increased by 2.05 kg / m3. For the treatment of 2 times of irrigation, after the same amount of water was added to the jointing stage, both yield enhancement and filling efficiency were improved to some extent, the yield increase was increased by 12.93% ~ 21.89% and the filling efficiency was increased by 3.41 ~ 4.21 kg / m3 .