| 油松幼龄林竞争指标的初步研究 |
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| 引用本文： | 杨澄 黄汉民. 油松幼龄林竞争指标的初步研究[J]. 陕西林业科技, 1996, 0(3): 32-36 |
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| 作者姓名： | 杨澄 黄汉民 |
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| 作者单位： | [1]西北林学院 [2]铜川市城区农技服务中心 |
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| 摘 要： | 通过对油松幼林１０种竞争指标的定性分析，将其划分为：林木个体与群体平均比率、树冠形状、营养空间利用状况三个类；讨论了各指标在营林生产中的实用意义。运用主分量分析，验证了分类的正确性，研究指出，相对胸径、投影比率、生长空间指数，是在林木竞争中起较大作用的指标。
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| 关 键 词： | 油松 幼龄林 竞争指标 主分量分析 飞播林 |
PRELIMINARY STUDY ON THE COMPETITIVE INDEX IN YOUNG PINUS TABULAEFORMIS FOREST |
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| Yang Cheng, Zhang Xinyou. PRELIMINARY STUDY ON THE COMPETITIVE INDEX IN YOUNG PINUS TABULAEFORMIS FOREST[J]. Shaanxi Forest Science and Technology, 1996, 0(3): 32-36 |
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| Authors: | Yang Cheng Zhang Xinyou |
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| Abstract: | Through the qualitative analysis 10 comeptitive indexes in the young Pinus tabulaeformis forest are divided into 3 groups as: the mean ratio of individual to the population, crown shape, the available trophic space. The significance of these indexes on forest management is discussed. The result of PCA analysis shown that the classification is correct. The GST, the branch stretching, the trunk roundness and the ratio of lignt to tree crown are important in the process of trees competition. |
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| Keywords: | Pinus tabulaeformis Young forest Competitive indexes PCA analysis Air seeding |
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