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栽植密度对小黑杨人工林幼龄材和成熟材生长量的影响(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2007年05期
Page:
44-48
Column:
研究论文
publishdate:
2007-05-20

Article Info:/Info

Title:
Effects of Planting Density on Growth Increment of Juvenile and Mature Wood in Populus×xiaohei
Article ID:
1000-2006(2007)05-0044-05
Author(s):
FEI Ben-hua WANG Xiao-qing* LIU Xing-e REN Hai-qing
Research Institute of Wood Industry, CAF, Beijing 100091, China
Keywords:
Populus×xiaohei Planting density Juvenile wood Mature wood
Classification number :
S721
DOI:
10.3969/j.jssn.1000-2006.2007.05.010
Document Code:
A
Abstract:
The effects of different planting densities (1000, 500, 250stem/hm2) on growth increment of juvenile and mature wood were studied in Populus×xiaohei. The result indicated that the juvenile period was about 12~13 years and there are no differences in juvenile wood growth rings at different planting densities. The effects of planting densities on widths and basal area of juvenile and mature wood were highly significant. An obvious tendency of increasing juvenile wood width and basal area with decreasing planting densities was seen. The highest mature wood growth increment was found at the planting density of 500stem/hm2. The percentage of juvenile wood area ranged from 74% to 83% depending on different planting densities. The highest juvenile wood proportion being at the lowest planting density. The growth rate of juvenile wood was about 10 times higher than that of mature wood. There were remarkable differences in the growth rate of both juvenile and mature wood at different planting densities. It’s concluded that planting densities showed various degrees of impact on the growth of juvenile and mature wood, and juvenile wood was more susceptible to planting density.

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Last Update: 2013-05-20