彭曼-蒙太斯法制定阿克苏红枣根渗灌灌溉制度

[目的]为控制土壤水分、提高水分生产率和实现节水与高效提供科学依据.[方法]利用彭曼-蒙太斯法对2年的气象资料间接计算出阿克苏地区全生育期红枣日平均耗水量,并分析其变化规律.[结果]试验区红枣树耗水规律:3月初～5月中旬日耗水量保持在2～4 mm,从5月下旬～8月下旬日耗水量增加到4～6 mm,从8月下旬～10月中旬日耗水量又下降到2～3 mm.[结论]确定根渗灌红枣适宜的灌溉制度为:灌溉定额5 865 m3/hm2,灌水定额为255 m3/hm2,整个生育期灌水21次.

Building A Root-irrigation by Schedule for Akesu Red-Jujube Based on the Equation of Penman-Monteith

【Objective】To provide a scientific basis for controlling soil moisture content,improving moisture content efficiency,and realizing water-saving and high-efficiency.【Method】In this paper,the evaporation of red-jujube in the Akesu irrigation area was indirectly gained from weather information of two years based on the equation of Penman-Monteith,and the laws of change has been analysed.【Result】The water consumption pattern of the red jujube trees in the test area was obtained from the analysis:from the beginning of March till mid-May the daily consumption amount of water maintains between 2-4 mm,from the end of May till the end of August the daily consumption amount of water increased 4-6 mm,from the end of August till mid-October the daily consumption amount of water descended to 2-3 mm.【Conclusion】For root-irrigation by infiltration,the suitable irrigation schedule is the follwing:the irrigation quota is 5 865 m3/hm2,the irrigation water quota is 255 m3/hm2,and 23 times of irrigation during the whole growth period.