[1]邵锦锋,魏柏松.湿地松林抚育间伐与修枝技术[J].南京林业大学学报(自然科学版),2005,29(05):069-72.[doi:10.3969/j.jssn.1000-2006.2005.05.017]
 SHAO Jin-feng,WEI Bai-song.Techniques of Thinning and Pruning in Plantations of Pinus ellottii[J].Journal of Nanjing Forestry University(Natural Science Edition),2005,29(05):069-72.[doi:10.3969/j.jssn.1000-2006.2005.05.017]
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湿地松林抚育间伐与修枝技术
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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05期
页码:
069-72
栏目:
研究论文
出版日期:
2005-05-20

文章信息/Info

Title:
Techniques of Thinning and Pruning in Plantations of Pinus ellottii
文章编号:
1000-2006(2005)05-0069-04
作者:
邵锦锋1魏柏松2
1. 江西省林业厅, 江西 南昌 330046; 2. 江西省林业科学研究院, 江西 南昌 330033
Author(s):
SHAO Jin-feng1 WEI Bai-song2
1. Forestry Department of Jiangxi, Nanchang 330046, China; 2. Jiangxi Forestry Science Academy, Nanchang 330033
关键词:
湿地松林 抚育间伐 修枝
Keywords:
Plantations of Pinus ellottii Thinning Pruning
分类号:
S718
DOI:
10.3969/j.jssn.1000-2006.2005.05.017
文献标志码:
A
摘要:
<正>利用电子顺磁共振(ESR)技术对竹材热处理至900℃的炭化机理进行了研究。结果表明:(1)600℃左右是竹材炭化的一个非常重要的热处理温度。低于600℃时,为竹材炭化的热解阶段;高于600℃时,为竹材炭化的过渡阶段,并且产生非常显著的硅效应。(2)竹材的热分解历程主要表现为自由基反应。(3)竹炭中的水分和炭化气氛对自旋中心的性质和弛豫机制都产生了比较明显的影响,并且在不同的炭化阶段产生的影响不同。
Abstract:
Based on the investigation and experimental trials for thinning and pruning on same site, planting densities and stand age, the first time for thinning and pruning of Pinus ellottii plantation was at 7~8 years old. While standard degree of closing of the plantation reacl-Ted 0.85, current annual increment of DBH started to decline, and the intensity of thinning should not exceed 30%. The second time of thinning should be based on the silvicultural purpose and management intensity, usually intensity of thinning should not exceed 35%, and thinning interval was about 5~6 years. If the culture aims are for the large diameter of construction commercial forest, the third thinning should be carried out, and 600~680 tree/hm2 should be reserved for harvest. Pruning should be practiced after thinning, and intensity of pruning is 1/3 of tree height for the first time, while 1/2 of tree height is for the second time. The pruning interval is about 3~5 years, and pruning times are the best from early spring to deep autumn.

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[1]管惠文,董希斌*,张 甜,等.间伐强度对大兴安岭落叶松天然次生林水文性能的影响[J].南京林业大学学报(自然科学版),2018,42(06):068.[doi:10.3969/j.issn.1000-2006.201712004]
 GUAN Huiwen,DONG Xibin*,ZHANG Tian,et al.Effects of thinning on hydrological properties of the natural secondary Larix gmelinii forest in the Daxing’an Mountains[J].Journal of Nanjing Forestry University(Natural Science Edition),2018,42(05):068.[doi:10.3969/j.issn.1000-2006.201712004]

更新日期/Last Update: 2013-05-20