| 日本落叶松人工林直径分布规律的研究 |
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| 引用本文： | 马友平,冯仲科,刘永清. 日本落叶松人工林直径分布规律的研究[J]. 林业资源管理, 2006, 0(5): 40-42,70 |
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| 作者姓名： | 马友平 冯仲科 刘永清 |
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| 作者单位： | 北京林业大学测绘与3S技术中心,北京,100083;湖北民族学院生物科学与技术学院,湖北,恩施,445000;北京林业大学测绘与3S技术中心,北京,100083;湖北民族学院生物科学与技术学院,湖北,恩施,445000 |
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| 摘 要： | 通过对20块标准地的调查,按立地指数将其分为好、中、差三类,分别按标准地和不同立地统计其径阶株数,分别用选中的两个分布,正态分布与weibull分布进行参数的拟合检验。检验结果表明:按标准地分析90%的服从正态分布,95%的服从weibull分布;按立地分析,立地质量好的两个分布均服从,差的均不服从,中等的仅服从weibull分布。
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| 关 键 词： | 日本落叶松人工林 正态分布 weibull分布 χ2检验 |
| 文章编号： | 1002-6622（2006）05-0040-03 |
| 收稿时间： | 2006-05-10 |
| 修稿时间： | 2006-05-102006-09-12 |
The Laws of Japanese Larch Plantation's Diameter Distribution |
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| MA Youping,FENG Zhongke,LU yunqing. The Laws of Japanese Larch Plantation's Diameter Distribution[J]. Forest Resources Management, 2006, 0(5): 40-42,70 |
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| Authors: | MA Youping FENG Zhongke LU yunqing |
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| Affiliation: | 1. Mapping and 3S Technology Center, Beijing Forestry University, Beijing 100083; 2, College of Biological Science and Technology, Hubei Institute for Nationalities, Enshi 445000, Hubei Province, China |
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| Abstract: | The diameter distribution of Japanese Larch plantation was studied in this paper.On the basis of the measurement of 20 standard plots,we divide it into 3 classes: good,medium and bad,make a statistic of trees of different diameter index exponents by standard plots and by different sites.Normal distribution and Weibull distribution are used for parameter modeling test.The results indicate that:(1) 90% of the laws of Japanese Larch plantation's diameter distribution follow Normal distribution;95% of the laws of Japanese Larch plantation's diameter follow Weibull distribution from standard plots aspect;(2) the diameter distribution laws of Japanese Larch plantation with good site conditions follow Normal distribution and Weibull distribution,but those with bad site conditions only follow Weibull distribution. |
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| Keywords: | Japanese Larch plantation normal distribution Weibull distribution test |
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