摘要
应用ＰＶ技术对榆树等１１个喀斯特森林树种的耐旱性进行初步研究，结果表明：ＰＶ曲线所获的水分状况参数能直接或间接地反映植物的耐旱能力。以ＰＶ曲线所获水分状况参数为基础数据，用极点排序法和主成分分析法对喀斯特森林树种的耐旱性强弱进行分类评价，将榆树等１１个树种分为耐旱性弱、耐旱性中等和耐旱性强三大植物群，同时说明了用数量分析法对植物生态生理特性进行分类评价是可行的。
The drougth-tolerances of 11 species of trees in Karst forest were studied with PV technique.The results showed that water parameters showed on PV curves could reflect the drought-tolerance of plants directly or indirectly. Based on the data of water parameters showed on PV curves, the drought-tolerances of trees were classified into 3 groups: weak, medium and strong by polar ordination and the principal component analysis. It is suggested that the quantitative analysis is effective in classifing the ecological and plysiological characters of plants.
关键词
树种
耐旱性
渗透势
水分状况参数
PV曲线
drought-tolerance
PV technique
osmotic pressure
water parameters
