摘要
根据立地指数的不同将长白落叶松林地分为7个立地等级（立地Ⅰ～Ⅶ），结合其营林技术规程选择造林密度为2500株／hm^2、3300株／hm^2和4400株／hm^2等不同类型的长白落叶松人工林分作为评估对象。在前人研究的基础上计算该不同类型林分在各林龄阶段的平均树高，利用相关模型推算相应林龄阶段的林分平均胸径和林分平均单株材积。建立长白落叶松人工林分的密度定量管理模型，根据此模型确定不同立地等级不同初植密度长白落叶松人工林分在理想状态下的间伐时间、间伐强度和木材收获量，为其营林生产和科研提供参考。
The Larix olgensis var. changpaiensis planting sites were divided into 7 grades from Ⅰ to Ⅶ according to the site index, the stand of different planting density including 2 500 trees/hm^2, 3 300 trees/hm^2 and 4 400 trees/ hm^2 were chosen as the targets for evaluation. On the basis of relevant study results, the average tree height of different stands at different ages was calculated, the average DBH and individual volume were calculated as well. The control mode of stand density was established. According to the mode, thinning time, thinning intensity and timber output of Larix olgensis var. changpaiensis plantation of different ages under different site conditions were figured out.
出处
《西部林业科学》
CAS
2006年第3期87-92,共6页
Journal of West China Forestry Science
关键词
长白落叶松
人工林
龄期
木材产量评估
Larix olgensis vat. changpaiensis
plantation
age
timber output evaluation
