基于杉楠近自然改造后的杉木直径分布模型研究  

Developing Diameter Distribution Model of Chinese Fir Plantations after Close-to-nature Silviculture Mixed with Phoebe bournei

作　　者：江怡航 刘振华[3] 胡宇欣 潘红林 陈涵玥 张建国[1] 张雄清[1,2] JIANG Yi-hang;LIU Zhen-hua;HU Yu-xin;PAN Hong-lin;CHEN Han-yue;ZHANG Jian-guo;ZHANG Xiong-qing(State Key Laboratory of Efficient Production of Forest Resource,Key Laboratory of Tree Breeding and Cultivation of National Forestry and Grassland Administration,Research Institute of Forestry,CAF,Beijing 100091,China;Collaborative Innovation Center of Sustainable Forestry in Southern China,Nanjing Forestry University,Nanjing 210037,Jiangsu,China;Hunan Academy of Forestry,Changsha 410000,Hunan China)

机构地区：[1]林木资源高效生产全国重点实验室,国家林业和草原局林木培育重点实验室,中国林业科学研究院林业研究所,北京100091 [2]南京林业大学南方现代林业协同创新中心,江苏南京210037 [3]湖南省林业科学院,湖南长沙410000

出　　处：《林业科学研究》2024年第5期85-93,共9页Forest Research

基　　金：十四五国家重点研发计划课题(2021YFD2201304)。

摘　　要：[目的]杉木闽楠近自然改造模式是当前我国杉木人工林近自然改造的主要技术模式。研究杉楠近自然改造后的杉木直径分布模型,可为精准预测近自然改造后的杉木材种出材量提供重要依据。[方法]以湖南郴州西山林场杉木闽楠近自然改造试验林为研究对象,利用Normal分布、Lognormal分布、Weibull分布和Gamma分布4种常用的概率密度函数模拟杉楠近自然改造后的杉木直径分布,并通过偏度和峰度分析了杉木直径分布的特点。[结果]研究发现相对于对照纯林模式,近自然改造增加了杉木大径级的株数占比,杉木平均直径与杉木直径分布的偏度正相关。根据各模式林分直径分布的卡方检验结果,Normal分布和Weibull分布拟合近自然改造下杉木直径分布效果较优。[结论]结合Weibull函数的适应性和灵活性的特点,Weibull分布可用于杉楠不同近自然改造模式下的杉木直径分布,研究结果对于精准预测近自然改造下杉木的材种出材量具有重要意义。[Objective]Close-to-nature silviculture of Chinese fir plantations mixed with Phoebe bournei(Hemsl.)Yang is the main management mode in China.Developing diameter distribution model of Chinese fir after close-to-nature silviculture can provide an important basis for accurately predicting the timber output of Chinese fir plantations.[Method]Based on the Chinese fir forests mixed with Phoebe bournei in Chenzhou Xishan Forest Farm,Hunan,the diameter distribution of Chinese fir after close-to-nature silviculture was fitted using four commonly used probability density functions,including Normal distribution,Lognormal distribution,Weibull distribution and Gamma distribution.Also,the skewness and kurtosis were used to describe the diameter distribution characteristics of Chinese fir.[Results]Compared with pure forest,the close-to-nature silviculture mixed with Phoebe bournei increased the proportion of large-diameter of Chinese fir,and the mean DBH of Chinese fir was positively correlated with the skewness.In addition,according to the χ^(2) test,both of the Normal distribution and Weibull distribution performed better than the other two distributions.[Conclusion]Combined with the adaptability and flexibility of the Weibull function,the Weibull distribution can be used for modelling the diameter distribution of Chinese fir after close-tonature silviculture mixed with Phoebe bournei.The study plays an important role in accurately estimating the timber output of Chinese fir under close-to-nature silviculture.

关 键 词：杉木 闽楠 近自然改造 直径分布 

分 类 号：S750[农业科学—森林经理学]