摘要
为了解辽东大伙房水库库区天然针阔次生林内林分空间结构的优劣,本研究以角尺度、大小比数、混交度和林分空间结构指数这4个结构参数作为切入点,对天然针阔次生林上坡位和下坡位的林分空间结构特征进行了调查。结果表明:上坡位的林木水平分布格局表现为随机分布,下坡位表现为轻微的聚集分布,从两种坡位中林木的大小分化程度来看,下坡位偏亚优势状态,上坡位偏中庸状态;上坡位混交度为0.29,下坡位混交度为0.56,上坡位林分呈弱度混交,下坡位为中度混交,下坡位混交程度较上坡位好;下坡位林分的林分空间结构指数为68.04,上坡位为54.81,林分整体结构较上坡位更稳定。通过4种林分空间结构参数的分析,得出天然针阔次生林下坡位的林分空间结构较上坡位稳定,本研究结果可为该区林分空间结构调整提供一定的依据。
To understand the merit of spatial Dahuofang Reservoir area, eastern Liaoning, structure of coniferous-broadleaf secondary forests in we measured four structure parameters, i.e., angu- the characteristics of stand spatial structure in upper slope and lower slope. The results showed that the horizontal distribution of the forest in the upper slope was randomly distributed, while that in the lower slope was characterized by a slight clustering distribution. In terms of individual plant size in the two positions, a subdominant state was found in the lower slope, while moderate neutral state was found in upper slope. The mixing degree was 0.29 and 0.56 for the upper and lower slope respectively, with the latter one being better. The spatial structure index was 54.81 and 68.04 for the upper and lower slope, respectively, so the integral structure in the lower slope was better. Our results suggested that the forest spatial structure in the lower slope was better than that in the upper slope, which provided a basis for managing the forest structure in this area.
作者
弓文艳
陈丽华
余新晓
郑学良
张雪琪
GONG Wen-yan;CHEN Li-hua;YU Xin-xiao;ZHENG Xue-liang;ZHANG Xue-qi(Beijing Forestry University,Beijing 100000,China)
出处
《生态学杂志》
CAS
CSCD
北大核心
2018年第11期3255-3261,共7页
Chinese Journal of Ecology
基金
林业生态科技工程子课题"三北地区防护林体系结构定向调控技术研究与示范"(2015BAD07B03)资助
关键词
天然针阔次生林
角尺度
混交度
大小比数
林分空间结构指数
natural mixed coniferous-broadleaf secondary forest
angle index
mingling degree
neighborhood comparison
stand spatial structure index.