摘要
在自然干旱胁迫条件下,对5年生油松、岷江柏、刺槐、榆树4个树种的生理生化指标分别在旱季和雨季进行测定,分析讨论了干旱胁迫下,各树种生理生化指标的变化规律及其相关关系。根据4个树种在干旱胁迫条件下各指标的表现,利用主成分分析法对4个树种的抗旱性进行综合评价。抗旱性综合评价结果表明:4个树种的抗旱能力以刺槐的抗旱性最强,油松的抗旱性最差。其排名顺序为:榆树>刺槐>油松>岷江柏。
Under natural arid condition, the physiological data of 4 tree species, i.e., Pinus atbualefor- mi, Ulmus pumila, Robinia pseudoacac, and Ulmus pumila, which were all 5-year-old, were determined in dry and raining season, respectively. The variation and relationship of the physiological data under drought stress were discussed to perfect the drought theory of plant. Then the method of principal compo- nent analysis was used to analyze the physiological data in order to evaluate the ability of drought resis- tance of the 4 native tree species. The results showed that the drought resistance levels of the 4 native tree species were as follows： Robinia pseudoacac〉Ulmus pumila〉Ulmus pumila〉Pinus atbualeformi.
出处
《贵州林业科技》
2012年第4期1-6,共6页
Guizhou Forestry Science and Technology
基金
"十一五"国家科技支撑计划重大项目(2006BAC01A11)
四川农业大学森林培育重点学科建设项目
关键词
干旱河谷
乡土树种
抗旱性
主成分分析
Arid valleys
Native tree species
Drought-resistance
Principal component analysis
