在林分生长模型研究中,选择描述林分直径分布的函数至关重要。以雷州半岛白骨壤种群为研究对象,对其开展直径调查,所得数据以偏度、峰度为指标,并运用正态分布、Weibull分布和Gamma分布等3种概率密度函数进行参数拟合检验,分析白骨壤种群的直径分布特征。研究结果表明:雷州半岛白骨壤种群以中小径阶居多,其偏度和峰度均大于0,直径分布曲线为左偏态,分布曲线比较陡峭,呈尖峰态;正态分布和Weibull分布的拟合效果较差,而Gamma分布则具有较好的拟合效果;通过建立Gamma分布参数预估方程,可预测林分各个径阶的株数及其动态变化。通过对雷州半岛白骨壤种群直径分布规律的调查研究,以期为雷州半岛白骨壤群落的经营管理以及利用提供一定的参考。
In the stand growth model,selection of the stand diameter distribution functions is crucial.In this paper the diameter of Avicennia Marina in Leizhou Peninsula was used as the research object.The resulting data skewness and kurtosis were used as indicators,and three kinds of probability density function parameters of normal distribution,Weibull distribution and Gamma distribution were used for fit testing and analysis of the Avicennia Marina diameter distribution characteristics.The results showed that the Avicennia marina population is distributed in small and midium diameters in Leizhou Peninsula and the skewness and kurtosis are greater than 0,diameter distribution curve is left skewness,distribution curve is steep,showing peak state.Normal distribution and Weibull distribution fitting effect is poor,and Gamma distribution is fitted with good results.Through the establishment of Gamma distribution parameter estimation equation each diameter class and its dynamics can bepredicted.The result provides reference for the management and utilization of Avicennia marina community in Leizhou Peninsula.
[1]韩维栋,黄剑坚,蔡俊欣.白骨壤果实的营养成分及含量[J].林业科技,2007,32(3):51-52.
[2]陈伟,钟才荣.红树林植物白骨壤的育苗技术[J].热带林业,2006,34(4):26-27.
[3]孟宪宇.测树学[M].2版.北京:中国林业出版社,1996:66-98.
[4]吴承祯,洪伟.林分直径结构新模型研究[J].西南林学院学报,1999,19(2):90-95.
[5]韩东锋,钱拴提,孙丙寅,等.油松飞播林直径结构规律研究[J].西北林学院学报,2008,23(5):182-187.
[6]孟宪宇.使用Weibull 函数对树高分布和直径分布的研究[J].北京林学院学报,1988(1):40-48.
[7]姜磊,陆元昌,廖声熙,等.滇中高原云南松林分直径结构研究[J].林业科学研究,2008,21(1):126-130.
[8]Mctagne J P,Bailey R A .Compatible basal and diameter distribution models for thinned lobolly bine plantations in sonta CatarinaBrazil[J].Forest Science,1987,33(1):43-51.
[9]周元满,黄剑坚,聂页,等.特呈岛天然红海榄地径分布规律研究[J].西南大学学报:自然科学版,2013,35(3):52-57
[10]张雄清,雷渊才.北京山区天然栎林直径分布的研究[J].西北林学院学报,2009,24(6):1-5.
[11]陈昌雄,陈平留,刘健,等.闽北天然次生林林木直径分布规律的研究[J].福建林学院学报,1996,16(2):122-125.
[12]洪伟,吴承祯.马尾松人工林经营模式及其应用[M].北京:中国林业出版社,1999:132-135.
[13]刘金福,江希钿,黄增,等.闽东柳杉人工林直径分布的研究[J].林业勘察设计,1997(1):30-35.
[14]韩维栋,高秀梅.雷州半岛红树林生态系统及其保护策略[M].广州:华南理工大学出版社,2009:1-20.
[15]谢小魁,苏东凯,刘正纲,等.长白山原始阔叶红松林径级结构模拟[J].生物学杂志,2010,29(8):1477-1481.
[16]Nelson T C.Diameter distribution and growth of loblollypine [J].For.Sci.,1964,10(1):105-114.
[17]陈华豪,丁思统,蔡贤如,等.林业应用数理统计[M].大连:大连海运学院出版社,1988.
[18]盖钧镒.试验统计方法[M].北京:中国农业出版社,2000:130-143.
