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| 林分密度和立地对油松人工林生长的影响 | |
| 引用本文： | 公宁宁,马履一,贾黎明,段劼. 林分密度和立地对油松人工林生长的影响[J]. 辽宁林业科技, 2010, 0(2): 11-14 |
| 作者姓名： | 公宁宁 马履一 贾黎明 段劼 |
| 作者单位： | 北京林业大学省部共建森林培育与保护教育部重点实验室,北京,100083 |
| 基金项目： | 国家林业局“948”项目(2005-04-02);;北京市教育委员会学科与研究生教育项目;;2003北京市重点项目(2003-018-L18);;北京林业大学科技创新计划(BLJD200904) |
| 摘 要： | 以北京山区25块油松人工林样地为研究对象,调查了40年生油松人工林在不同林分密度和立地条件下的生长状况,建立了林分密度与平均胸径、平均树高、平均冠幅和单木材积之间的回归方程,相关指数都在0.9以上;以样地平均优势木的解析材料确定40年生优势木树高,按单项立地因子实际分布区间分组,进行方差分析、差异显著性检验、多重比较。结果表明:随着林分密度的增大,平均胸径、平均树高、平均冠幅、单木材积逐渐减小;北京山区40年生油松人工林密度应控制在1 500株/hm2以下;明确了北京山区油松人工林生长与立地因子的关系,初步确定了油松人工林适宜的立地条件为:低山、阴坡、有效土层厚度(A+B层)45cm以上。 |
| 关 键 词： | 油松人工林 林分密度 立地因子 生长 |
Effects of different densities and site conditions on growth of Pinus tabulaeformis plantations in Beijing |
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| GONG Ning-ning,MA Lv-yi,JIA Li-ming,DUAN Jie. Effects of different densities and site conditions on growth of Pinus tabulaeformis plantations in Beijing[J]. Liaoning Forestry Science and Technology, 2010, 0(2): 11-14 | |
| Authors: | GONG Ning-ning MA Lv-yi JIA Li-ming DUAN Jie |
| Affiliation: | The Key Laboratory for Silviculture and Conservation of Ministry of Education/a>;Beijing Forestry University/a>;Beijing 100083/a>;China |
| Abstract: | Based on the data investigated from 25 sample plots in mountainous areas in Beijing,the effects of different densities and site conditions on the growth of Pinus tabulaeformis plantations were analyzed.The regression equations were established between stand density and average DBH,tree height and crown width and single-tree volume,the relevant coefficients were all above 0.9.The dominant height of 40-year-old plantations was determined in line with the analytic data of the average dominant trees.The actual ... |
| Keywords: | Pinus tabulaeformis plantation density of stand site condition growth |
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