北京林业大学学报2012，Vol.34Issue(5)：25-30,6.
造林密度对白杨杂种无性系初期生长性状的影响
Effects of planting density on the early growth traits of white poplar hybrid clones
摘要
Abstract
To analyze the influence of planting density on growth properties of 5-year-old hybrid clones of Populus tomentosa,effects of seven planting densities( 2 500,1 667,1 111,833,625,500 and 417 trees / hm 2 ) on the growth and yield properties were studied by completely random block experiments located in Weixian County,Hebei Province of northern China. The results indicated that,the effects of planting density on the diameter at breast height( DBH) and individual stand volume were significant at 1% level 4 years later after planting,that on height growth was remarkable at 5% level only in the first year of afforesting,and that on stand volume per area was significant every year in first 5 years. Regression analysis showed that planting density significantly correlated with DBH,individual stand volume and tree height negatively,and significantly correlated with stand volume positively. The effect of density on current annual increment was related with density and growth properties. The planting density exceeding 1 111 trees / hm 2 could cause an early occurrence of maximum current annual increment and a short duration of rapid growth. Conversely,the low density could result in a late appearance of maximum current annual increment. According to the results, rapid growth period of short-rotation industrial plantation of clone S86 was first 2--4 years after planting.关键词
白杨/杂种无性系/造林密度/生长性状Key words
white poplar/hybrid clone/planting density/growth property分类
农业科技引用本文复制引用
王利宝,张志毅,康向阳,宋连君,尚富华..造林密度对白杨杂种无性系初期生长性状的影响[J].北京林业大学学报,2012,34(5):25-30,6.基金项目
基金项目：“十一五”国家科技支撑计划项目（2006BAD24804、2006BAD01A1502）. （）
