在人工气候室和温室条件下,控制不同土壤水势梯度,从叶解剖构造及叶的运动和脱落等方面研究了1～3年生油松、侧柏、栓皮栎、元宝枫、刺槐、白蜡、紫穗槐、沙棘和黄栌的耐旱特性.结果表明,针叶树的叶解剖构造比阔叶树更有利于防止水分的丧失,其中油松又优于侧柏.在干旱条件下,叶子的运动和脱落与叶水势临界值有关,而且,在不同的干旱阶段,树木叶子的主要运动形式是不同的. Under the condition of artificial climate chamber and greenhouse, the gradient of soil water potential was controlled. The anatomical structure of leaves and leaf movement and detachment were studied in this paper. Pinus tabulaeformis, Platycladus orientalis, Quercus variabilis, Acer truncatum, Robinia pseudoacacia, The results showed that the leaf anatomy of conifers was better than that of broad-leaved trees in preventing the loss of water, and the pine was superior to the arborvitae. Under drought conditions, leaf movement and fall and leaves The critical value of the water potential is related to, and, at different stages of drought, the main forms of movement of tree leaves are different.