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日本落叶松人工林直径分布规律的研究

作  者:
马友平;冯仲科;刘永清
单  位:
北京林业大学测绘与3S技术中心;湖北民族学院生物科学与技术学院
关键词:
日本落叶松人工林;正态分布;weibull分布;χ2检验
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。
译  名:
The Laws of Japanese Larch Plantation's Diameter Distribution
作  者:
MA Youping~(1,2),FENG Zhongke~1,LU yunqing~2(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)
关键词:
Japanese Larch plantation,normal distribution,Weibull distribution,test
摘  要:
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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