火干扰对西伯利亚落叶松保留木胸径生长的影响

以树轮年代学年轮指数为指标，采用突变分析和对比分析的方法，分析了火干扰对新疆喀纳斯泰加林主要组成树种西伯利亚落叶松胸径生长的影响。结果表明，西伯利亚落叶松受到火干扰后如果得以保留，其胸径生长过程会发生显著变化，主要表现为存在一个明显的胸径加速生长期。说明火干扰对西伯利亚落叶松不只有破坏作用的一面，而且对其保留木还有促进生长的生态作用。

The Influence of Fire Disturbance on the D.B.H. Growth of Remained Woods of Larix sibirica Ldb.

The natural fire is one of the most important natural disturbances in Taiga forests and has great influence on the biological individual growth and development in those communities. According to the indicators of dendrochronology-ring index, this paper uses methods of mutation analysis and comparative analysis to comprehend the influence of fire disturbance on diameters at breast height D. B. H. growth of the remained woods of Larix sibirica Ldb. that is the principal composition in Taiga forests at Kanas in Xin- jiang. The results showed that if some woods of L. sibirica Ldb. were remained after a fire disturbance, the growth of diameter growth process would significantly change and a clear accelerating growth period would come. In a summary, fire disturbance not only create destructive impact on L. sibirica Ldb. , but promote the growth of diameter growth of the remained woods.