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在箭杆杨成林农田防护林带中、进行了不同灌溉量处理下林木的水势、蒸腾速率、气孔阻抗和气温与叶温差的整个生长季内各月的日变化测定，以及林木材积量测定。结果表明，不灌溉的对照水势、蒸腾速率、气温与叶温差最低，气孔阻抗最高，体内水分状况和材积生长量同属最差。60mm灌溉量次之。90、120、150mm灌溉量的体内水分状况较60mm略好，它们之间只有轻微的差别，基本相同，但材积生长量却增加不显著。从体内水分状况和材积生长量分析，兼顾节水问题，提出了60mm为合理灌溉量的数量指标。
The daily variation of water potential, transpiration rate, stomatal impedance and air temperature and leaf temperature difference under different irrigation volume were measured in each month in Yangchenglin farmland shelterbelt. The results showed that the control water potential, transpiration rate, temperature and leaf temperature difference were the lowest, and the stomatal impedance was the highest. The water status and volume growth were the worst. 60mm irrigation took second place. 90,120,150 mm irrigation volume of body water conditions slightly better than 60mm, there is only a slight difference between them, basically the same, but the volume growth was increased insignificantly. According to the analysis of the moisture status and volume growth in the body and the problem of water saving, a quantitative index of 60mm irrigation volume was put forward.