Korean spruce(Picea koraiensis Nakai)has been included as a Chinese regenerationspecies since the 1960’s.In the 1970’s it became one of the four most important species in thenortheast forest region of China. Korean ...Korean spruce(Picea koraiensis Nakai)has been included as a Chinese regenerationspecies since the 1960’s.In the 1970’s it became one of the four most important species in thenortheast forest region of China. Korean spruce is a timber species with a wide range of adaptation,high survival rate,and few diseases or pests.Studies of 30—year trials show that the regeneration ofkorean spruce is successful and has a prospective future.展开更多
树高和胸径是森林调查中重要的测量因子,常用来计算材积、立地指数和其他与森林生长和收获、演替和碳汇相关的重要变量（Dorado et al.,2006）。树木胸径可以快速、方便且准确的测量，而树高的测量费时费力。在森林调查时，常常只测量...树高和胸径是森林调查中重要的测量因子,常用来计算材积、立地指数和其他与森林生长和收获、演替和碳汇相关的重要变量（Dorado et al.,2006）。树木胸径可以快速、方便且准确的测量，而树高的测量费时费力。在森林调查时，常常只测量部分树木的树高，缺失的树高则通过不同树种的树高曲线来预测（S6nehez—Gonzalez et al．，2007）。展开更多
文摘Korean spruce(Picea koraiensis Nakai)has been included as a Chinese regenerationspecies since the 1960’s.In the 1970’s it became one of the four most important species in thenortheast forest region of China. Korean spruce is a timber species with a wide range of adaptation,high survival rate,and few diseases or pests.Studies of 30—year trials show that the regeneration ofkorean spruce is successful and has a prospective future.
文摘树高和胸径是森林调查中重要的测量因子,常用来计算材积、立地指数和其他与森林生长和收获、演替和碳汇相关的重要变量（Dorado et al.,2006）。树木胸径可以快速、方便且准确的测量，而树高的测量费时费力。在森林调查时，常常只测量部分树木的树高，缺失的树高则通过不同树种的树高曲线来预测（S6nehez—Gonzalez et al．，2007）。
