广东省针阔混交林直径分布规律研究

基于2012年广东省森林资源连续清查样地和样木调查数据,分析广东省针阔混交林直径分布特征,应用Weibull分布函数分别按全林分、不同起源、不同龄组和不同林分密度对省域尺度的针阔混交林林木直径分布进行了拟合和卡方检验。结果表明,在SPSS和Matlab软件中拟合出的15个模型中有10个能够较好地由Weibull分布函数模拟,多模型较好地表达了起源、龄组、林分密度等主要林分因子的针阔混交林林木直径分布。但纯天然起源、人工植苗、幼龄林、中龄林、林分密度为1 000~1 500株/hm2和2 000~3 000株/hm2的针阔混交林林木直径分布模型因受人为干扰,Weibull拟合效果不理想,需进一步尝试其它抗干扰模型。

Study on the Diameter Distribution of Coniferous and Broadleaved Mixed Forest in Guangdong Province

The diameter distribution characteristics of coniferous and broadleaved mixed forest in Guang- dong province were analyzed based on the sample plots and trees survey data from the Guangdong continuous forest inventory achievements for 2012. Also Weibull distribution function and two checking methods had been used to fit and check the diameter distribution characteristics of coniferous and broadleaved at provincial scale from respects of the whole forest, different origins, different age groups, and different stand density. The results shows： 10 models of the 15 fitted models in SPSS and Matlab were well simulated by Weibull distribution function, multi models could be used to show the diameter distribution charac- teristics of coniferous and broadleaved with the principle stand factor of origins, age groups and stand density etc, which would supply a basis for fbrest management strategy and forestry macro decision-mak- ing. But the diameter distribution characteristics of coniferous and broadleaved mixed forest of natural origins, artificial planting, young and middle age groups, 1000 - 1500 and 2000 -3000 trees per hm2, weren＇ t well fitted by Weibull distribution function because of human disturbance, further research should be conducted by other anti-jamming models.