冀北山地落叶松林分结构优化技术研究

Study on spatial structure optimization of Larix forest in northern Hebei

为了研究华北落叶松人工纯林的空间结构特征,从林分树种组成、直径分布特征以及垂直结构特征3方面对河北省北沟林场的华北落叶松林进行了分析。结果表明:该林分中落叶松为绝对优势树种,树种结构单一;落叶松人工林的直径大致符合正态分布情况,林下更新较差,处于不良的发育阶段;树高分布呈现双峰分布情况,落叶松上层分层较为明显。以林分树种组成,直径及树高分布为依据,提出林分结构调整的几种方法,使林分结构更加接近最优状态。

In order to study the spatial structure characteristics of Larix principis - rupprechtii, the larch forest of Beigou Forest Farm in Hebei Province was analyzed from the characteristics of forest species, diameter distribution and vertical structure. The re- suits showed that the larch was the dominant tree species, and the tree species had a single structure. The diameter of Larix gmelinii plantation was in accordance with the normal distribution, the freshness of the forest was poor, and the tree height distribution showed bimodal distribution Situation, larch upper layer is more obvious. Based on the composition of tree species, diameter and tree height distribution, several methods of forest structure adjustment were put forward, which made the stand structure closer to the optimal state.