摘要
对杉木河国有林场南北坡向的马尾松人工林,采用正态分布、Weibull分布、Logistic分布、Gamma分布和Lognormal分布5种分布函数,进行直径分布的拟合与验证研究。结果表明:1)样地马尾松平均胸径为17.93 cm,南坡的平均胸径略大于北坡;2)南坡马尾松的直径分布存在普遍的左偏和离散现象,说明其拥有优越的生长空间结构,相比之下北坡则略显不足;3)大部分样地均符合正态分布拟合曲线,尤其是北坡样地,与正态分布的拟合效果显著,而南坡样地的马尾松人工林与Weibull分布的契合度更高,两者之间存在一定的差异。
The normal distribution, Weibull distribution, Logistic distribution, Gamma distribution and Log- normal distribution of the Pinus massoniana plantation in the north and south slope of Shamuhe forest farm were studied by fitting and validating the diameter distribution. The results showed that ： 1 ） The average DBH size of the 8 Pinus massoniana plantations was 17.93 cm, and the average diameter of the southern slope was slightly larger than that of the northern slope. 2） The diameter distribution of Pinus massoniana in the southern slope was common. 3） Most of the plots were in accordance with the normal distribution curve, especially the northern slope, and the fitting effect of the normal distribution in the northern slope was significant, and the fitting effect of the Weibull distribution in the southern slope plot was higher, and there was some difference between north and south slope.
出处
《中南林业调查规划》
2017年第3期37-41,53,共6页
Central South Forest Inventory and Planning
关键词
马尾松人工林
南北坡
直径分布
分布函数
Pinus massoniana plantation
north and south slope
diameter distribution
distribution function
