摘要
以山西朔州地区的人工林小黑杨为研究材料,研究不同栽植密度（2 m×5 m、4 m×5 m、4 m×10 m）对小黑杨边材、湿心材生长量的影响。结果表明：不同栽植密度间边材年轮数差异不显著,而湿心材年轮数差异显著;栽植密度对边材宽度影响不大,而对湿心材宽度影响达极显著水平;对边材面积和湿心材面积影响均达极显著水平。随着栽植密度的减小,小黑杨边材、湿心材宽度及面积均呈增加趋势,但湿心材增加得更快。湿心材比例为60%~68%,且随着栽植密度的减小而增大。总体而言,栽植密度对小黑杨边材、湿心材生长量有不同程度的影响,且对湿心材生长量影响较大。
The effects of different planting densities （2 m ×5 m,4 m × 5 m,4 m × 10 m） on increment of sapwood and wetwood of Populus × xiaohei were studied from Shuozhou Country, Shanxi Province. The results indicated that there were insignificant differences in the number of sapwood growth rings at various planting densities, while significant differences existed in the number of wetwood growth rings. The planting density showed little impact on sapwood width, while it had highly significant effects on wetwood width. For both sapwood and wetwood basal area, there were highly significant differences at various planting densities. A tendency of increasing sapwood and wetwood width as well as basal area with decreasing planting densities was found, and it was also noticed that the width and basal area of wetwood increased more intensively than that of sapwood. The wetwood proportion ranged from 60% to 68%, showing a negative relationship with the planting density. In general, the planting density showed various degrees of impact on growth of both sapwood and wetwood of Populus × xiaohei, and it showed more obvious effects on wetwood growth, comparatively.
出处
《林业科学研究》
CSCD
北大核心
2007年第4期490-494,共5页
Forest Research
基金
国家自然基金重点项目"利用遥感技术预测人工林木材性质和利用价值的研究"(30230420)资助
关键词
小黑杨
栽植密度
边材
湿心材
Populus × xiaohei
planting density
sapwood
wetwood
