Effects of Planting Density on Growth of New Clones in Populus tomentosa

编号 zgly0000301812

文献类型 期刊论文

文献题名 Effects of Planting Density on Growth of New Clones in Populus tomentosa

学科分类 220.99;林学其他学科

作者 ZhangZihui  ZhangZhiyit  LinShanzhi  LiXinguo 

作者单位 CollegeofBiologicalSciencesandBiotechnology 

母体文献 中国林学: 英文版 

年卷期 2003,5(2)

页码 23-29

年份 2003 

分类号 S792.117 

关键词 毛白杨  无性系  造林密度  胸径生长  枝条重量 

文摘内容 Effects of seven planting densities on the growth and tree form of nine 5-year-old new clones in Populus tomentosa were studied. The plantations, arranged with completely random block design, were located in Wuzhi County, Henan Province.Results indicated that effects of planting density on the diameter at breast height (DBH), individual volume and growing stock increment of all new clones in P. tomentosa were significant at the 1% level of probability, effects of planting density on the tree height increment of new clones B2 and B31 and on the live branches height (LBH) increment of new clones B5 and B30 were significant at the 5% level of probability, while the interaction between planting density and clone was not significant at the 5% level of probability. It was concluded that the degree of differences among new clones within the same planting density was different with different planting densities and traits. For short rotation industrial timber, clones B 1, B3, B4, B5, B7, B9, B31 were suitable with the density of 1 000-2 500 trees per hectare, while for bigger diameter timber, clones B1, B3, B4, B7, B9, B31 could be used with the planting density of 660-833 trees per hectare. Clonal repeatability was also different in different planting densities。