摘要
为了给海南省低质低效次生林分的改造经营提供科学、合理的参考依据,利用正态分布、对数正态分布、Weibull分布、Γ分布4种分布函数分别对阿陀岭的4种加勒比松林分的直径分布规律进行了分析研究。结果表明:(1)4种林分的直径分布曲线均为左偏态,林木株数均偏向中小径阶;(2)加勒比松与台湾相思混交林和加勒比松与海南柃混交林用Weibull分布函数拟合的效果更好,加勒比松与浙江润楠混交林用Γ分布函数拟合的效果比较理想,加勒比松纯林用Weibull分布和Γ分布函数拟合效果接近,无显著差异。说明Weibull分布对4种林分的适应性和灵活性最强,正态分布最差,Γ分布和对数正态分布居中。
In order to provide scientific and reasonable reference for low-quality and low-benefit forest in Hainan Province,the author studied diameter distribution regularities of 4 types of Pinus caribaea stand based on 4 probability density function：normal distribution,lognormal distribution,Weibull distribution and gamma distribution.The results showed that：（1） 4 kinds of stand diameter distribution curves were left skewness.The majorities of Pinus caribaea plants were medium and small diameter at breast height trees;（2） Weibull distribution function had better fitting effect for diameter distribution of Pinus caribaea and Acacia Taiwan mixed forest,gamma distribution had better fitting effect for diameter distribution of Pinus caribaea and Hainan muricata mixed forest,and Weibull distribution and gamma distribution had similar fitting effect for diameter distribution of Pinus caribaea pure forest.That was to say,for 4 stands Weibull distribution was the best,normal distribution was the worst,gamma distribution and lognormal distribution was general taking account of adaptability and flexibility.
出处
《中国农学通报》
CSCD
2012年第22期16-21,共6页
Chinese Agricultural Science Bulletin
基金
中央财政林业科技推广资金项目"海南低质低效次生林高效培育技术示范"(琼林[2010]172号)
湖南省"十一五"重点学科建设计划资助项目"森林经理学科"(2006-028-0015)
关键词
海南省
加勒比松
直径分布
Hainan Province
Pinus caribaea
diameter distribution
