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本文通过对侧柏等11个树种的多个水分生理指标的测定,用主分量分析法将各树种划分为3个生态生理群:灌木旱生群、针叶较旱生群和阔叶中生群。用综合评审法将其依抗旱性大小进行排序:侧柏、甘蒙柽柳、野枸杞、柠条、油松、白榆、文冠果、臭椿、旱柳、河北杨、刺槐。认为:以主分量分析进行的类群划分在造林中具有实际应用价值。应用综合评审法对树种间抗旱性进行比较,方法简便易行。
Based on the determination of several hydrophytic indexes of eleven species such as arborvitae, the tree species were divided into three ecophysiological groups by principal component analysis: shrubs, softwoods and broad-leaved meadows. It was sorted according to drought resistance size by comprehensive assessment: Platycladus orientalis, Glycyrrhiza ussuriensis, Lycium barbarum, Caragana korshinskii, Pinus tabulaeformis, Ulmus pumila, Avena sativus, Ailanthus altissima, Salix matsudana, Hebei poplar and black locust. It is considered that the taxonomic grouping based on principal component analysis has practical value in afforestation. Application of comprehensive assessment of drought resistance among species comparison, the method is simple and easy.