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南方红豆杉修枝经营措施优化及评价(PDF/HTML)

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

Issue:
2017年01期
Page:
117-122
Column:
研究论文
publishdate:
2017-01-31

Article Info:/Info

Title:
Optimization of pruning operation method for Taxus wallichina var. mairei
Article ID:
1000-2006(2017)01-0117-06
Author(s):
OU Jiande1 WU Zhizhuang2
1.Mingxi County Forestry Bureau of Fujian Province, Sanming 365200, China;
2. Zhejiang Provincial Key Laboratory of High Efficient Processing of Bamboo, China National Bamboo Research Center, Hangzhou 310012, China
Keywords:
Taxus wallichina var. mairei pruning intensity interval principal component analysis pruning effect speed evaluation method
Classification number :
S711; S757
DOI:
10.3969/j.issn.1000-2006.2017.01.018
Document Code:
A
Abstract:
【Objective】In order to accelerate tree growths and improve lumber quality, a new pruning optimization and evaluation method(maximizing speed of comprehensive pruning effect)was proposed.【Method】Based on the pruning field experiments, this method created a pruning effect evaluation index system by changing pruning effect speed and significance analysis. Then a mathematical model with comprehensive scores of pruning effect speed was developed using the principal component analysis(PCA). Finally the optimized pruning measures were obtained by using the comparison of comprehensive scores of the pruning measurement and validation. As a result, the pruning measurement optimization was achieved. A pruning intensity test of Taxus wallichina var. mairei was carried out in Mingxi, Fujian Province to verify the effectiveness of the method, which preliminarily realized the optimization of pruning intensity and interval combination. 【Result】The pruning intensity and interval combination significantly affected the tree growth and trunk shape traits, and it is necessary to optimize the pruning operation methods. The pruning optimum combination of Taxus wallichina var. mairei were 0.3 pruning intensity and four-year interval period by using maximizing speed of comprehensive pruning effect method. The optimum combination of pruning effect rate on the volume and breast height form was 4.11% per year and 0.48% per year, respectively. The volume of pruning optimum combination significantly increased by 15.94%, and the breast height form significantly increased by 2.04%, illustrating that the pruning optimum combination effectively accelerated tree growth and improved lumber quality.【Conclusion】The new pruning optimization and evaluation method(maximizing speed of comprehensive pruning effect)had strong operation and high accuracy, it can greatly accelerate tree growth of forests and improve lumber quality.

References

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Last Update: 2017-01-30