摘要
依据塞罕坝华北落叶松放叶期和生长季７个晴天完整的野外分层实测资料，研究了光在林分优势木、平均木和被压木单株树冠中的衰减和吸收过程，比较了林分中不同类型林木的冠结构与光分布规律的关系。研究发现，光在不同类型林木单株树冠中的传递均呈负指数衰减过程，累积吸收率则呈幂函数递增。并就不同冠层对光吸收的贡献与树冠结构动态分析及抚育间伐修枝方面的关系进行了讨论。
Based on the measurement data of seven sunny days in the period of leafgrowth of Larix principisrupprechtii and in the growing season, the processes of light attenuation and light absorption in the tree crown of different types of individual trees(i.e. domiant tree, mean sampletree and dominated tree) were studied. The relationship between tree crown structure and light distribution law for the different types of forest trees were compared. The results showed a negative exponent attenuation of light transmitted through the crown of individual trees and a power function progressive increase of cumulative absorptivity. Furthermore, the relationships among contribution of different layers of tree crown to light absorption, dynamic analysis of tree crown structure and thinning as well as pruning were discussed.
出处
《河北林果研究》
1997年第2期99-107,共9页
Hebei Journal of Forestry and Orchard Research
基金
国家自然科学基金
关键词
华北落叶松
不同类型林木
冠结构
光分布
Larix principisrupprechtii, different types of forest trees
tree crown structure
light distribution
