29年生杉木林下植物多样性与密度的关系

Relationship between Undergrowth Species Diversity and Stand Density of 29-year-old Chinese fir Plantations

采用定位研究方法对福建南平峡阳29年生(20地位指数级)的一代杉木人工林林下植被多样性与林分密度的关系进行了研究,结果表明,杉木人工林林分密度对林下植物乔木层和灌木层的物种多样性有显著影响,但对草本层和藤本层的物种多样性没有显著影响 林分密度最低(900株·hm-2)的杉木林其林下植被乔木层和灌木层植物多样性显著高于最高林分密度(1500株·hm-2以上)

The relationship between undergrowth species diversity and stand density of 29-year-old,first-rotation (site index class 20) Chinese fir plantation in Xiayang state forest farm,Nanping,Fujian,China,were investigated by permanent plot sampling. Analysis of the results showed that stand density of the Chinese fir plantation had significant effects on the species diversities of shrub and tree layers of undergrowth communities, but had no significant effects on the herb and vine layers. Species diversities of tree and shrub layers of undergrowth of the Chinese fir plantation with the lowest stand density (900 stem·hm^(-2)) were significant higher than those with the highest stand density (over 1 500 stem·hm^(-2)).