为了探索依据水面蒸发量确定灌溉定额的可行性,在防雨棚下测坑中进行了夏玉米灌溉试验。结果表明,从总耗水量看,畦灌略高于沟灌,而沟灌又略高于滴灌,但差别不是很大。畦灌条件下植株发育快,滴灌次之,沟灌最慢。畦灌和滴灌下产量均以中等灌溉定额处理最高,而沟灌下产量以最大灌溉定额处理最高。总体上,滴灌条件下水分利用效率高于其他2种灌溉方式。干旱条件下,畦灌下以E601蒸发皿蒸发量(PE)作为夏玉米灌溉定额,每次灌水60mm;滴灌下以2/3PE作为灌溉定额为宜,灌水定额为20mm。 In order to explore the feasibility of determining the irrigation quota according to the evaporation of the water surface, the summer maize irrigation experiment was conducted under the rain shelter. The results showed that, from the total water consumption, 畦 irrigation slightly higher than furrow irrigation, furrow irrigation and slightly higher than drip irrigation, but the difference is not great. Under irrigation conditions, plants developed fast, followed by drip irrigation and slowest furrow irrigation. Under irrigation and drip irrigation, the yield of middle irrigation was the highest, while that under furrow irrigation was the highest under the maximum irrigation quota. In general, water use efficiency under drip irrigation was higher than the other two irrigation methods. Under drought conditions, E601 pan evaporation (PE) was used as the summer corn irrigation quota under irrigation with 60mm irrigation. The drip irrigation with 2/3 PE as the irrigation quota was suitable and the irrigation quota was 20mm.