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随着水资源的日益紧缺，研究作物的优化灌溉制度、实施有限水分亏缺灌溉已成为节约用水的重要课题，尤其是对一些新型种植方式和灌水技术条件下的作物优化灌溉制度进行研究，更具有重要意义。根据甘肃省民勤绿洲白兰瓜覆膜种植的情况，采用动态规划方法对膜上沟灌白兰瓜的优化灌溉制度进行了研究，以促进这种新型灌水技术和高效经济作物的发展。经比较分析确定 ４５０ ｍ~３／ｈｍ~２为民勤灌区膜上沟灌的最佳灌水定额。
With the increasing shortage of water resources, it is an important issue to study the optimized irrigation system of crops and to implement limited water deficit irrigation. In particular, some new planting methods and crop irrigation systems under irrigation technology conditions are more studied It is of great significance. According to the planted planting of Bai Langua in Minqin oasis in Gansu Province, the dynamic programming method was used to study the optimal irrigation regime of Bai Langua with membrane ditch irrigation in order to promote the development of this new irrigation technology and efficient cash crop. The comparative analysis shows that 450 m ~ 3 / hm ~ 2 is the best irrigation quota for the film mulch irrigation in Minqin irrigation area.