The growth process of Chinese fir trees under the pattern of reserving broad leaved tree species in Chinese fir plantation and in pure Chinese fir stand(control) were studied. The results showed that comparing with th...The growth process of Chinese fir trees under the pattern of reserving broad leaved tree species in Chinese fir plantation and in pure Chinese fir stand(control) were studied. The results showed that comparing with the control, the tree height, D.B.H and tree volume increment of Chinese fir under the pattern was a little slower in the early seven years and higher at 8～22 5 year old. After 22 5 year old the increment declined hardly (though total increment was higher than the control). All these reflected the effect of tree competition and soil fertility development on the tree growth of Chinese fir. In order to cultivate large timber under the pattern, the relationship of Chinese fir and broad leaved tree species must be adjusted in time and the broad leaved trees existed in the same forest canopy with Chinese fir must be cut over at about 20 year old.展开更多
赛黑桦（Betula schmidtii）,又称辽东桦,散孔材;木质厚重、坚硬,传统上用来制作车轴、木锤、擀面杖、算盘珠等（戚继忠等,2009;Akcehob et al.,2006）,主要生长在我国东北东部与朝鲜接壤地区,与该地区相邻的朝鲜南部和俄罗斯南部海滨...赛黑桦（Betula schmidtii）,又称辽东桦,散孔材;木质厚重、坚硬,传统上用来制作车轴、木锤、擀面杖、算盘珠等（戚继忠等,2009;Akcehob et al.,2006）,主要生长在我国东北东部与朝鲜接壤地区,与该地区相邻的朝鲜南部和俄罗斯南部海滨一带（锡霍特山脉南端）亦有分布,成年立木高约20m,树干直径约70cm,寿命约300-350年（Nechaeva,1972;RedBookoftheUSSR，1984；Korkishko，1992）。展开更多
文摘The growth process of Chinese fir trees under the pattern of reserving broad leaved tree species in Chinese fir plantation and in pure Chinese fir stand(control) were studied. The results showed that comparing with the control, the tree height, D.B.H and tree volume increment of Chinese fir under the pattern was a little slower in the early seven years and higher at 8～22 5 year old. After 22 5 year old the increment declined hardly (though total increment was higher than the control). All these reflected the effect of tree competition and soil fertility development on the tree growth of Chinese fir. In order to cultivate large timber under the pattern, the relationship of Chinese fir and broad leaved tree species must be adjusted in time and the broad leaved trees existed in the same forest canopy with Chinese fir must be cut over at about 20 year old.
文摘赛黑桦（Betula schmidtii）,又称辽东桦,散孔材;木质厚重、坚硬,传统上用来制作车轴、木锤、擀面杖、算盘珠等（戚继忠等,2009;Akcehob et al.,2006）,主要生长在我国东北东部与朝鲜接壤地区,与该地区相邻的朝鲜南部和俄罗斯南部海滨一带（锡霍特山脉南端）亦有分布,成年立木高约20m,树干直径约70cm,寿命约300-350年（Nechaeva,1972;RedBookoftheUSSR，1984；Korkishko，1992）。
