摘要
运用ＰＶ技术制作了黔中喀斯特森林２１个常见树种的ＰＶ曲线，分析了由ＰＶ曲线导出的８个水分状况参数的生态意义。用聚类分析和ＰＣＡ对２１个树种的水分状况参数进行了归类，阐明这些树种对水分亏缺适应的途径、类型上的分异，并用座标综合评定法对２１个树种的耐旱性进行了评定。同时讨论了ＰＶ技术在树木水分生态研究中的应用。
The Pressure-Volume curves of 21 main tree species in Karst forest have made by using the method of PV-technique and the ecological effect of water state parameters from PV-curves were analysed. Twenty-one tree species were divided into five ecological groups according to the simlarity and difference of 8 water state parameters by means of agglomerative classification and PCA. The classification result showed the differences among these ecological groups on the path and the mode of water deficit adaption. The drought resistances of 21 tree species were evaluated using coordinate combined evaluation method. The advance of using PV-technique on tree water ecological researches were discussed in this paper too.
基金
国家"八.五"科技攻关课题
关键词
喀斯特森林
水分状况
耐旱性
树种
选择
karst forest pressure-volume curves water state parameters drought resistance
