天然次生林火干扰史的重建方法

采用多证据综合分析法重建近20a火烧迹地火干扰历史。通过样地调查,对照分析样地内林木龄级结构(火前年龄峰及残存树的结构、火后年龄峰及更新状况)及乔、灌、草数量、盖度等植被特征。结合各样地树木火疤年轮、火疤木成疤时的树龄、粗木质残体状况、可燃物积累量、树木熏黑高度、熏黑木数量等现存死活物状况,得出包括火烧年份、火烧程度、火烧次数等在内的样地火干扰历史。

Reconstruction Method for Fire History of Natural Secondary Forests

A study was conducted to construct the fire history of natural secondary forests for the past 20 years. The age class structure of trees in the burned forest (age-peak before the fire, structure of survived trees, age-peak after the fire, and regeneration of young trees), and the quantity and coverage of trees, shrubs and herbs were analysed according to the investigation results of the sampling plots. The fire disturbance history of the sampling plots, including year of fire-occurring, burn severity, and burn frequency, were obtained by means of growth ring of fire scar of burned trees, tree age as fire scar formed, coarse woody debris, accumulating quantity of fuels, burned tree height, and quantity of burned trees.