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长白落叶松人工林密度表的编制及应用(PDF)

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

Issue:
2012年06期
Page:
69-75
Column:
研究论文
publishdate:
2012-12-05

Article Info:/Info

Title:
Compilation and application of reasonable density table for plantations of Larix olgensis Herry.
Author(s):
MA Wei SUN Yujun*
The Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing 100083,China
Keywords:
Larix olgensis Herry. plantation reasonable density thinning diameter distribution volume
Classification number :
S79138;S7585
DOI:
10.3969/j.jssn.1000-2006.2012.06.014
Document Code:
A
Abstract:
Based on 60 different aged dominant tree data in Larix olgensis Herry. plantations, saturated density model was built, and then complied the reasonable density table by diameter series. According to the table, we chose 26 plots which had similar values with reasonable densities of different age stages as test samples. Investigation and statistical results of mean values of diameter increment, diameter distribution and volume in the 26 plots were used to analyze and access the process and effect of thinning. Results showed that stand density declines with the increment of diameter, and an exponential functions of N=3 847345 1e-0082D was available for estimating reasonable density. The reasonable density table showed the optimum densities of age series between 06-08 cover closure. Average stand density before thinning of 26 sampling plot was 2 883 trees/hm2, and average stand densities after 3 times thinning were respectively 2 000, 1 400, and 1 000 trees/hm2. In mature forest, the density was 600 trees/hm2, crown competition factor (CCF) was 41633, the whole volume was 24212 m3/hm2, and the ratio of bigdiameter log was 5926 %.

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Last Update: 2012-11-30