【作者】 徐成立； 翟洪波； 李吉跃； 魏晓霞；

【Author】 Xu Chengli( Menglu- an Forestry Management Bureau, Hebei Province, Chengde 068450, P. R. China) ; Zhai Hongbo( Academy of Forest Inventory and Planning, State Forestry Administration) ; Li Jiyue( Beijing Forestry University) ; Wei Xiaoxia( Academy of Forest Inventory and Planning, State Forestry Administration)

【机构】 河北省孟滦林管局； 国家林业局调查规划设计院； 北京林业大学；

【摘要】 针对北京西部山区的油松栓皮栎混交林.提出了确定林分合理密度的步骤:(1)求算出林分在一般年份的生长季标准比导率;(2)求算出林分在生长季内可用于树木蒸腾的降水量;(3)模拟树木胸径处边材面积随年龄的生长进程;(4)由生长季可用降水量、生长季标准比导率和不同年龄林分标准木胸径处的边材面积,推出在特定降雨环境下林分的合理密度。给出了油松栓皮栎混交林在20—31 a内的合理密度表。更多还原

【Abstract】 The calculation steps on reasonable density of Pinus tabulaeformis and Quercus variabilis mixed stands in the western mountainous region of Peking are as follows: first, calculating the standard specific conductivity of growing season in ordinary year; second, calculating the available rainfall for tree transpiration in growing season; third, stimulating the growth process of the sapwood area for breast height diameter with age; finally, reckoning the reasonable density of stand under a given rainfall environment based on available rainfall and standard specific conductivity of growing season, as well as the sapwood area of standard tree at breast height diameter for different ages. A table for reasonable densities of Pinus tabulaeformis and Quercus variabilis mixed stands from 20 to 31 years old was given.更多还原