白桦天然林林分结构与空间分布格局特征分析  

Analysis of stand structure and spatial distribution pattern characteristics of natural Betula platyphylla Sukaczev forest

作　　者：徐冰 付立华 张菲 张岩 XU Bing;FU Lihua;ZHANG Fei;ZHANG Yan(Saihanba Mechanical Forest Farm of Hebei,Weichang 068466,China)

机构地区：[1]河北省塞罕坝机械林场,河北围场068466

出　　处：《安徽农学通报》2025年第6期55-58,共4页Anhui Agricultural Science Bulletin

基　　金：河北省林业和草原科技推广示范项目“天然次生林结构化经营技术示范推广”(冀TG〔2021〕013号)。

摘　　要：本文基于天然次生林结构化经营技术,对白桦天然林进行抚育间伐,同时在林冠下栽植华北落叶松和云杉,测定试验地经营前后的直径分布、乔灌草盖度和角尺度,以此分析试验地林分结构和空间分布格局。结果表明,经营后的试验地林分大径级林木占比增加,促进了林分结构的完整性和稳定性,同时增加了林分的生产力;经营后试验地林分的灌木层、草本层盖度均有所增加,林分垂直层结构较完整,属于复杂结构;经营后试验地的角尺度约0.50,林分空间分布格局呈随机分布。综上,使用天然次生林结构化经营技术在一定程度上促进了林分的稳定性以及林分空间结构的分配,提高了林分的生产力。本研究为白桦天然次生林的经营提供参考。Based on the structured management technology of natural secondary forest,the natural forest of Betula platyphylla Sukaczev was tended and thinned,and Larix gmelinii and Picea asperata under the canopy were planted.The diameter distribution,cover of trees and grasses,and angular scale of the experimental plots were measured before and after management,so as to analyze the stand structure and spatial distribution pattern.The results showed that,after management,the proportion of large-diameter trees increased,which promoted the integrity and stability of the stand structure,and increased the productivity of the stand;after management,the coverage of shrub layer and herbaceous layer of the experimental stand increased,and the vertical layer structure of the stand was complete and belonged to complex structure;after management,the angular scale of the experimental land was about 0.50,and the spatial distribution pattern of the stand was random.In conclusion,the structural management of natural secondary forest can promote the stability of stand and the distribution of stand spatial structure to a certain extent,and improve the productivity of stand.This study provides references for the management of natural Betula platyphylla Sukaczev secondary forest.

关 键 词：林分结构 白桦 空间分布格局 角尺度 

分 类 号：S718[农业科学—林学]