红安县紫云寨林场枫香次生林林分结构特征分析

structure characteristics of Liquidambar formosana secondary Forests in ziyunzhai Forest Farm in Hong》an county

摘要:

以枫香次生林为研究对象 , 通过标准地作业了解湖北大别山 区枫香林分结构特征 , 为合理经营提供科学依据 。在 有代表性林分中设置标准地 , 并进行常规标准地作业 , 在此基础上进行林分结构特征进行分析 。结果表明:红安县紫云寨林场 枫香次生林物种组成较为丰富 , 共有 17科 24属 27个树种 。在上林层中 , 枫香是主要树种;在中林层中 , 枫香、杉木、杜仲及朴 树是主要树种 , 中林层基本包含整个森林类型树种 。上林层、中林层和下林层的平均胸径分别为 19. 48~21. 71、10. 16~ 11. 06、6. 61~7. 69cm。上林层是林分总体蓄积量的主要贡献层次 , 占总体蓄积量的 50. 55%~82. 87% 。上林层径级分布主 要呈不规则多峰曲线 , 中林层的径级主要集中分布在 6~12cm , 下林层径级分布呈倒“J”形分布 。只要停止 自然及人为的干 扰 , 森林就能在自然力的作用进行顺行演替。

Abstract:

TaKing Liquidambar formosana secondary Forests as research object , analyzed its structure characteristics in the Dabie Mountain area oFHubei province , in order to provide a scientiFic basis For rational management. standard plots were set up in representative stands , and conventional standard plots were carried out. on this basis , the structural charac- teristics oFstands were analyzed. The results showed that the secondary Forest species composition was relatively rich , there were in total oF17Families , 24genera and 27tree species . In the upper Forest layer , L. formosana was the main tree species . In the middle Forest layer , L. formosana , cunninghamia lanceolata , Eucommia ulmoides and celtis sinensis were main tree species , and the middle Forest layer basically contains the whole Forest type tree species . The average DBH oF the upper , middle and lower layers were 19. 48~21. 71, 10. 16~11. 06, 6. 61~7. 69cm respectively. The upper Forest layer was the main contribution level oFthe total stand stocK, accounting For 50. 55%~82. 87% oFthe total stand stocK. The diameter class distribution oFthe upper Forest layer was mainly irregular multi-peaKcurve , the diameter class oFthe middle Forest layer was mainly concentrated in the range oF6~12cm , and the diameter class distribution oFthe lower Forest lay- er was inverted“J”distribution in ziyunzhai Forest Farm in Hong》an county. As long as natural and man-made disturb- ances were stopped , the Forest could carry on a sequential succession under the action oFnatural Forces .