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利用宁夏扬黄新灌区地膜玉米试验地土壤水分观测资料，对地膜玉米的水量平衡进行了动态分析，并运用FAO－PM方程计算分析了该地区地膜玉米生育期间的蒸散量及地膜玉米的耗水规律，由此对该地区地膜玉米的灌溉制度进行了初步分析。结果表明，该地区地膜玉米生育期内的耗水量除受作物本身生物学特性的影响外，主要依赖于灌溉量的大小，要保证玉米的正常生长发育，全生育期一般需灌水5－6次，灌水量在3450－3900m3／hm2。
The water balance of plastic mulched maize was dynamically analyzed based on the soil moisture data of plastic film mulched corn in Ningxia-Yangzhuang New Irrigation Area. The evapotranspiration and water consumption of plastic mulched corn were calculated and analyzed by using the FAO-PM equation The law, which made a preliminary analysis of the irrigation system of maize in this area. The results showed that the water consumption during the growth period of maize mulched in the area was mainly dependent on the amount of irrigation, except for the biological characteristics of the crop itself. To ensure the normal growth and development of maize, the whole growth period was generally 5-6 times , The amount of irrigation in 3450-3900m3 / hm2.