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为研究树木的抗旱机制，文中对长白落叶松、樟子松、红皮云杉、油松和水曲柳的抗旱性进行了探讨。结果表明，自然失水不同时期，各树种的水分参数不同，其变化速率也不同。各时期均以水曲柳和落叶松失水速率最大，红皮云杉次之，樟子松和油松失水速率最小；与之相关的各树种其它水分参数变化由快到慢的顺序也如此。落叶松和水曲柳的质膜相对透性较小，樟子松和红皮云杉较大，油松质膜相对透性居中；脱水对各树种叶绿素代谢的影响由强到弱依次为水曲柳、红皮云杉／油松、樟子松和落叶松。落叶松与樟子松的抗旱机制不同，落叶松属于忍耐脱水耐旱树种，而樟子松属于延迟脱水耐旱树种，水曲柳与落叶松相似，油松与樟子松相似，红皮云杉抗旱机制属中间类型。
In order to study the drought resistance mechanism of trees, the paper discussed the drought resistance of Larix olgensis, Pinus sylvestris var. Mongolica, Picea koraiensis, Pinus tabulaeformis and Fraxinus mandshurica. The results showed that, at different periods of natural water loss, the water parameters of different species were different, and the rate of change was also different. In each period, the water loss rate of Fraxinus mandshurica and Larix gmelinii was the highest, the spruce was the second, and the water loss rate of Pinus sylvestris var. Mongolica and Pinus tabulaeformis was the smallest. The order of the other water parameters changed from fast to slow in this way. The relative permeability of Larch and Fraxinus mandshurica were less, the Pinus sylvestris var. Mongolica and P. rubescens were larger, and the relative permeability of P. tabulaeformis plasma membrane was middle. The effect of dehydration on the chlorophyll metabolism of each tree species was water Manliu, red spruce / Pinus, Pinus sylvestris and larch. Larch and Pinus sylvestris different drought resistance mechanism, the larch belongs to the endurance dehydration and drought-resistant tree species, and Pinus sylvestris belongs to delayed dehydration and drought-resistant tree species similar to the Larix, Pinus tabulaeformis and Pinus sylvestris similar to the red cloud Cedar drought resistance mechanism is an intermediate type.