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湿地松林抚育间伐与修枝技术(PDF)

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

Issue:
2005年05期
Page:
69-72
Column:
研究论文
publishdate:
2005-05-20

Article Info:/Info

Title:
Techniques of Thinning and Pruning in Plantations of Pinus ellottii
Article ID:
1000-2006(2005)05-0069-04
Author(s):
SHAO Jin-feng1 WEI Bai-song2
1. Forestry Department of Jiangxi, Nanchang 330046, China; 2. Jiangxi Forestry Science Academy, Nanchang 330033
Keywords:
Plantations of Pinus ellottii Thinning Pruning
Classification number :
S718
DOI:
10.3969/j.jssn.1000-2006.2005.05.017
Document Code:
A
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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Last Update: 2013-05-20