| 长白落叶松商品林林木竞争指标的研究 |
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| 引用本文： | 孙亚峰,王金国,尹立辉,张黎明.长白落叶松商品林林木竞争指标的研究[J].吉林林业科技,2004,33(1):41-45. |
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| 作者姓名： | 孙亚峰 王金国 尹立辉 张黎明 |
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| 作者单位： | 1. 吉林省林业调查规划院,吉林,延边,133000
2. 东北林业大学,黑龙江,哈尔滨,150040 |
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| 摘 要： | 本文以长白落叶松人工林林木为研究对象,选取了竞争压力指数和简单竞争指数等5种竞争指标,建立了胸径、树高和冠长与各竞争指标间的关系。通过对比,可以看出胸径与竞争指标CI、RCI、RC1、RC2间的关系比较密切,并且呈一定规律性变化,即上述指标随胸径的增大而呈指数方式减小。鉴于这种关系,选取了5个具有“J”形的线型经验方程,对胸径与各竞争指标之间的相关关系进行了建模。建模结果显示,胸径和竞争指标CI、RCI、RC1、RC2间的关系用双曲线和幂函数方程拟合较为适宜。
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| 关 键 词： | 长白落叶松 商品林 林木 人工林 竞争指标 胸径 |
| 文章编号： | 1005-7129(2004)01-0041-05 |
| 修稿时间： | 2003年11月18 |
Study on trees competition indexes to Larix olgensis commercial forests |
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| SUN Ya-feng,WANG Jin-guo,YIN Li-hui,ZHANG Li-ming.Study on trees competition indexes to Larix olgensis commercial forests[J].Jilin Forestry Scicnce and Technology,2004,33(1):41-45. |
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| Authors: | SUN Ya-feng WANG Jin-guo YIN Li-hui ZHANG Li-ming |
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| Institution: | SUN Ya-feng~1,WANG Jin-guo~1,YIN Li-hui~2,ZHANG Li-ming~1 |
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| Abstract: | Taking the trees in Larix olgensis commercial forests as the object of study, the relations of diameter at breast height (DBH), tree height and crown length among five competition indexes were established. Based on a contrast analysis, it concluded that there were close relations between DBH and the indexes (CIRCIRC1RC2), namely, a regular change appears in the indexes, which reduced with increasing of DBH. And then, modeling results by 5 linear empirical equations with "J" shape indicated that hyperbola and power function are suitable for fitting above-mentioned relations. |
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| Keywords: | Larix olgensis competition index diameter at breast height |
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