5种常绿阔叶树幼苗的抗旱性比较

为了发展节水型园林及为干旱地区绿化提供理论依据，采用盆栽控水的方法，研究了不同干旱胁迫对大叶桂樱Prunus zippeliana．石栎Lithocarpus gla6er．樟树Cinnamomum camphora，木荷Schima superba和红叶石楠红罗宾Photinia glabra×P.fraseri‘Red Robin’5种常绿阔叶树幼苗为试材，采用盆栽控水的方法，研究干旱胁迫对幼苗地上部形态和生理指标的影响，比较5种树的抗旱性。结果表明，干旱胁迫对5种树幼苗的影响有差异，随着土壤含水量的下降，5种树幼苗地上部形态均发生相应改变，叶片相对水分亏缺增大，失水率减小，相对电导率和脯氨酸质量分数上升，且变化幅度因树种和胁迫时间而异。综合这些指标进行分析，同时结合隶属函数法对其抗旱性进行比较，结果为：樟树〈木荷〈石栎〈红叶石楠红罗宾〈大叶桂樱。

Drought resistance in seedlings of five evergreen broadleaf tree species

In order to develop "water saving garden" and provide a theoretical basis to the green of arid areas. The experiment was conducted with 5 species tree seedlings of evergreen broad-leaved(Prunus zippeliana, Lithocarpus glaber, Cinnamomum camphora, Schima superba, and Photinia glabra × P. fraseri days, 20 days, 30 days and 35 days in pots in order to compare their drought resistant ability. Characteristics and physiological indicators of five tree species were studied with different drought stresses. Results showed that when soil water content for the five evergreen tree species decreased, the leaf relative water deficit increased, the water loss rate decreased, cell membrane permeation increased, and proline content increased. Also the range of different tree species and stress times were not the same. Through comprehensive analysis of these indexes of 5 seedlings, it was concluded that the drought resistant ability of these 5 species decreased in order:C. camphora