摘要
在细叶桉造林试验中,设计了7种密度,结果表明,在造林的当年,高密度林分能较早形成林分环境,有利于早期生长,而后来其个体间较早开始进行营养空间的竞争,部分个体生长受到抑制。随着时间的推移,高密度林分不利于冠径的发展。相应地低密度林分呈现出径生长较快的趋势,并且这种趋势随着树木长大而愈来愈明显。单株材积随密度的变化趋势与径的变化规律相一致。林分的蓄积量更大程度地受株数的作用,密度越大,蓄积量越大。建议细叶桉小径材和纸浆材的造林密度为2500株/hm2。
spacing treatments were selected according to the diversified results from spacing experiments in references for this experiment. Experimental results show that high density spacing benefited tree growth in early stage of plantation establishment because it was good for weed control. This effect was reduced with time. Low density spacing increased diameter of trees dramatically. The stand volume was affected more by tree density than diameter of individual tree. The best spacing suggested by the study is 2500 trees per hectare for pulp wood or pole production plantation.
出处
《生态环境》
CSCD
2003年第4期446-448,共3页
Ecology and Environmnet
基金
国家"九五"科技攻关项目(96-011-01-03)
