登入
選單
返回
Google圖書搜尋
The Effects of Precommercial Thinning on the Growth and Yield of Lodgepole Pine
Wayne David Johnstone
F. Van Thienen
其他書名
25-year Results
出版
Ministry of Forests & Range
, 2011
URL
http://books.google.com.hk/books?id=5QVbywAACAAJ&hl=&source=gbs_api
註釋
The effects of precommercial thinning 56-year-old lodgepole pine (Pinus contorta Dougl. var. latifolia Engelm.) are reported 25 growing seasons after treatment. Four post-thinning stand densities of 500, 1000, 1500, and 2000 trees per hectare, plus unthinned controls, were established on plots in central British Columbia. Both individual-tree and per-hectare data were analyzed. With the exceptions of mean height and periodic height growth, thinning had a statistically significant effect on all of the characteristics examined. Although this report provides only short-term information on the effects of thinning on the growth and yield of lodgepole pine, it does indicate the need to optimize individual-tree growth rates with levels of growing stock to maximize yield per unit area.