[1]童雀菊,张述垠.抚育间伐对北美短叶松的生长及材质的影响[J].南京林业大学学报(自然科学版),2005,29(06):073-76.[doi:10.3969/j.jssn.1000-2006.2005.06.018]
 TONG Que-ju,ZHANG Shu-yin.Effects of Precommercial Thinning on Tree Growth and Stem Quality in Jack Pine Stands[J].Journal of Nanjing Forestry University(Natural Science Edition),2005,29(06):073-76.[doi:10.3969/j.jssn.1000-2006.2005.06.018]
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抚育间伐对北美短叶松的生长及材质的影响
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《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

卷:
29
期数:
2005年06期
页码:
073-76
栏目:
研究论文
出版日期:
2005-10-20

文章信息/Info

Title:
Effects of Precommercial Thinning on Tree Growth and Stem Quality in Jack Pine Stands
文章编号:
1000-2006(2005)06-0073-04
作者:
童雀菊1张述垠2
1. 南京林业大学木材工业学院, 江苏 南京 210037; 2. 加拿大国家林产品研究所Forintek东部实验室, 加拿大 魁北克 G1P4R4
Author(s):
TONG Que-ju1 ZHANG Shu-yin2
1. College of Wood Science and Technology Nanjing Forestry University, Nanjing 210037, China; 2. Forintek Canada Corp., 319 rue Franquet, Quebec G1P 4R4, Canada
关键词:
抚育间伐 北美短叶松 树木生长 树干质量 疏伐强度
Keywords:
Precommercial thinning Jack pine Tree growth Stem quality Thinning intensity
分类号:
S782; TS653
DOI:
10.3969/j.jssn.1000-2006.2005.06.018
文献标志码:
A
摘要:
<正>采用动态热机械分析对-130~130℃范围内不同含水率的竹材动态力学性能进行了研究。结果表明:在-130~130℃的范围内,湿热作用下的竹材动态力学性能表现为负效应,湿热作用使储能模量降低,玻璃态转变点也随着含水率的增加而降低。竹材在含水率为10%和34%时的玻璃化转变点及损耗因子分别为30.5℃、0.02和10.61℃、0.04。
Abstract:
The impact of precommercial thinning (PCT) on tree growth and stem quality in jack pine was examined. The study was based on a PCT trial established in 1966 in New Brunswick, Canada. Three thinning intensities, 1.22 m×1. 22 m (A), 1. 52 m×1.52 m (B), 2.13 m×2.13 m (C), and a control stand were studied and a total of 154 sample trees were collected from the trial. Mortality in jack pine stands decreased from 67.6% to 32.7% with increasing PCT intensity from A to C. With increasing thinning intensity, tree diameter, merchantable stem heights and volumes, stem taper, branch diameter, and total lumber volume recovery per tree increased. Yet, only the most intensive thinning intensity (C) showed a significant effect on total tree height and crown development. PCT increased clear stem length, yet had no significant effect on wood density.

相似文献/References:

[1]周林,马以秀,张宏忠,等.水杉人工林抚育间伐效果比较及其经济效益分析[J].南京林业大学学报(自然科学版),1997,21(02):093.[doi:10.3969/j.jssn.1000-2006.1997.02.021]
 Zhou Lin Ma Yixiou Zhang Hongzhong Jiang Jiangang(Forestry and Pasture Bureau of Jianhu County of Jiangsu Province Jianhu 700)Zhu Guosheng.IMPACTS OF THINNING ON THE VOLUME INCREMENT AND REVENUES REVENUES OF METASEQUOIA GLYPTOSTROBOIDES PLANTATIONS[J].Journal of Nanjing Forestry University(Natural Science Edition),1997,21(06):093.[doi:10.3969/j.jssn.1000-2006.1997.02.021]

更新日期/Last Update: 2013-05-20