密云水库油松人工林的林分密度与生长因子  

Determining stand density from growth indicators for young Pinus tabulaeformis in the Miyun Reservoir,Beijing

作　　者：李晓宏[1] 高甲荣[1] 张金瑞[1] 杨麒麟[1] 

机构地区：[1]北京林业大学水土保持学院教育部水土保持与荒漠化防治重点实验室,北京100083

出　　处：《浙江林学院学报》2010年第6期821-825,共5页Journal of Zhejiang Forestry College

基　　金："十一五"国家科学技术支撑计划项目(2006BAD03A02)

摘　　要：林分密度是林分生长特征因子的主要控制因素。研究其影响规律及确定适宜密度,对培育和管理林分都具有重要意义。2007年,选择林龄10,15,20,25a且立地条件相似的6种林分密度(1050,1850,2355,3825,5133,5533株·hm-2)下的油松Pinus tabulaeformis人工林为研究对象,采用样地调查方法,对不同密度下油松人工林分的生长指标进行调查。结果表明:①林分密度与平均胸径和材积具有极显著的负相关性,与树高呈显著的负相关性,与林分蓄积量呈不显著的负相关;②从整体看,林龄对林分各生长指标都存在正相关,但不影响林分生长指标的总趋势;③从林木的长势情况和林地生产力方面考虑,林分合理密度应控制在1800～2300株·hm-2。To determine a reasonable density for cultivating and managing forests,stand density,an important element for controlling growth characteristics and for determining the impact on growth laws,was studied.Young Pinus tabulaeformis with six stand densities （1 050,1 850,2 355,3 825,5 133,and 5 533 stems·hm-2） and stand ages of 10,15,20,and 25 years with the same growing conditions in the Miyun Reservoir of Beijing were measured.Results showed that density had a strong negative relationship to diameter at breast height （DBH）（r=-0.757,P0.01） and volume of timber （r=-0.618,P0.01）,had a negative relationship to height （r=-0.479,P0.05）,and had no negative relationship to stock volume.Overall,there were positive relationships between forest age and growth indicators （P0.01）.According to growth indicators and plant production,a stand density of 1 800-2 300 stems·hm-2 was suggested.

关 键 词：森林经理学 林分密度 生长指标 材积 蓄积量 密云水库 

分 类 号：S757.3[农业科学—森林经理学]