以鄂西红豆(Ormosia hosiei Hemsl. et Wils)、红叶石楠‘红罗宾’(Photinia×fraseri ‘Red Robin’)、木荷(Schima superba)、榉树(Zelkova schneideriana)、苏柳172(Salix × jiangsuensis cv. ‘J172’)、紫叶李‘好莱坞’(Prunus cerasifera ‘Hollywood’)6个树种为研究对象进行干旱胁迫盆栽试验，比较各树种光合特性对干旱胁迫的响应差异。结果表明，干旱胁迫10 d内6树种光合特性对干旱的响应差异明显，紫叶李‘好莱坞’和苏柳172对干旱胁迫较为敏感，干旱胁迫10 d后光合水平显著下降，气孔限制为主要因素。榉树在处理第4天光合的下降由气孔限制引起，但第10天测定结果显示恢复正常。而鄂西红豆、木荷、红叶石楠‘红罗宾’在10 d胁迫期间未受气孔限制。比较正常灌溉水平下3个时点各树种的Ci／Ca平均值，干旱胁迫10 d内抗旱性表现从强到弱排序为：鄂西红豆、木荷、榉树、红叶石楠‘红罗宾’、苏柳172、紫叶李‘好莱坞’。

Six tree species(Ormosia hosiei Hemsl. et Wils, Photinia×fraseri ‘Red Robin’, Schima superba, Zelkova schneideriana, Salix×jiangsuensis cv. ‘J172’， Prunus cerasifera ‘Hollywood’) were conducted to compare the difference of photosynthetic characteristic and drought resistance. Results showed that there were great differences of photosynthetic characteristics of these six tree species during 10 d drought stress period. Photosynthesis of Prunus cerasifera ‘Hollywood’ and Salix jiangsuensis cv. ‘J172’ were much more sensitive to drought stress, of which there were significant decline of photosynthesis after 10 d drought stress due to stomatal limitation. In Zelkova schneideriana, stomatal limitation appeared after 4 d drought stress, however, the photosynthesis level return to normal level in the 10th day. In contrast, there was no stomatal limitation in Ormosia hosiei Hemsl. et Wils, Photinia fraseri ‘Red Robin’ and Schima superba during drought stress period. According to the Ci and Ca ratio of six tree species of normal irrigation during the 10 d period, the drought resistant ability arranged in descending order was Ormosia hosiei Hemsl. et Wils, Schima superba, Zelkova schneideriana, Photinia fraseri ‘Red Robin’, Salix jiangsuensis cv. ‘J172’, Prunus cerasifera ‘Hollywood’.