中文摘要：

探讨了不同供水条件下气象因素对侧柏和刺槐叶水势的影响以及它们的定量关系。结果表明：气温是树木叶水势最主要的影响因子。侧柏在水分充足时，气象因子对水势的影响顺序是气温〉光照强度〉空气相对湿度；水分不足时，气温〉空气相对湿度〉光照强度。在任何土壤含水量条件下，气象因子对刺槐叶水势的影响顺序均表现为气温〉光照强度〉空气相对湿度。

英文摘要：

Relationships between meteorological factors and leaf water potential of Platycladus orientalis and Robinia pseudoacacia under different water regimes were studied. The results showed that air temperature was the main impact-factor. The order was air temperature〉 intensity of illumination 〉air relative humidity when the water was adequate for P. orientalis. However, when soll was lack of water, the order was air temperature 〉 air relative humidity 〉 intensity of illumination. For R. pseudoacacia under any water regime, the orderwas air temperature〉 intensity of illumination 〉air relative humidity.