摘要
近10—20年来人工纯林火灾问题日趋严重,笔者于1985年4月至1987年5月,在鸡西市恒山区小恒山林场和汤源县黑金河林场进行外业调查和室内试验。研究结果,红松、樟子松林树木均易遭受火灾危害,其中红松更为敏感,在同龄相同的火烧条件下,红松比樟子松受害严重,年龄小的个体抗火性弱,受害严重,年龄大则相反。上山火坡上树木受害严重,下山火坡下部树木受害严重,受害树木的萌发和展叶明显落后于正常树木,而且萌发出的叶子颜色较浅,叶子厚度与高生长亦均低于正常树木,但是,火烧后的树木萌发出来的叶子的叶绿素含量越高,细胞膜透性越大。为研究树种的火生态特性及保护方面提供理论依据。
The plantations of korean pine (Pinus koraiensis) and mongolian scots pine(Pinussylvestris var. mongolica) mainly are pure stands. Fires are gradually causing problems in these plantation and being paid much more attention rccently. Study on the influence of fire on trees and the adaptation to fire, therefore, is of great important to probe the fire ccological propcrties and the protection ways of the two species. The results are as fol. lows: Both of the spccies are easily damaged by fire, but korean pine is more susccptible. In the same fire, korcan pine is damaged morc seriously than mongolian scots pine al-though they havc the same size. Young individuals have low fire resistant capacity and can be damaged scriously, and older ones havc strong fire resistance and can be damaged lightly. Up-hill lire makes a serious damage to the trees distributed in up-slopes with the reason of higher lire intensity. Down-hill fire makes a serious damage to the trees distributed in down-slopes with the reason of higher fire severity. The larger of dc' cambium area in the tree bark, the carlier of tree growth alter firc. During the early growth stage, the damaged tree bark will spill over much resin. The height of running resin is higher than that of dead cambium. Damaged trees sprout and grow more slowly and the length of leaves is shorter than these normal trees. The chorophyll content of serious damaged trees is much higher than that of normal trees. The chorophyll content of dying trees is 64.29％ higher than that of the contrast ones. Cell membrane penetrability of damaged trees is also higher than that of normal trees.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1992年第2期43-48,共6页
Journal of Northeast Forestry University
关键词
红松
樟子松
叶绿素
林火
Firc
Korcan pinc
Mongolian scots pinc
Chorophyll
