火灾后兴安落叶松长短枝变化及其对生存的影响

研究了兴安落叶松的长短枝习性及火灾对其影响．结果表明，短枝在春季发叶迅速，而长枝的生长对兴安落叶松的枝条及树冠结构的形成起决定性作用，且在１个长枝上能形成１０．５个短枝．中度火烧使兴安落叶松的树冠及枝条受到很大伤害，火烧可刺激１级侧枝上３７％的短枝芽变成长枝，加速了火烧后兴安落叶松树冠结构的恢复，火后第３年兴安落叶松的短枝总量达到火前水平的９８．４６％．

Translation of short and long shoots after burning and its effect on survival of Larix gmelinii

Studies on the characteristics of short and long shoots of Larix gmelinii and the effect of burning on them show that short shoot grows rapidly in early spring, and the growth of long shoot plays a key role in constructing the structure of branches and crown of Larix gmelinii. A long shoot can produce 10. 5 short ones in the next year. Medium fire can give a serious injury on the branches and crown of Larix gmelinii. After burning, 37% short shoot buds on the first class swig are turned into long shoots, which accelerates the branches and crown structure. In the 3rd year after burning, the total number of short shoots is 98. 46% of that before burning.