南亚热带珍稀濒危树种观光木生长过程研究  

Study on the Growth Process of Rare and Endangered Tree Species of Michelia odora in South Subtropics Zone

作　　者：金磊 JIN Lei(State-owned Weidu Forest Farm of Guangxi Zhuang Autonomous Region,Laibin,Guangxi 546100)

机构地区：[1]广西壮族自治区国有维都林场,广西来宾546100

出　　处：《园艺与种苗》2023年第6期6-8,36,共4页Horticulture & Seed

摘　　要：[目的]分析观光木树高、胸径、材积生长规律。[方法]应用树干解析法对38年生中国特有濒危树种观光木生长过程进行研究,并选取6种生长模型[对数方程、幂函数、逻辑斯蒂(Logistic)方程、理查德(Richards)方程、坎派兹(Gompertz)方程、考尔夫(Korf)方程]对观光木生长规律进行拟合模型分析。[结果]38年生观光木平均胸径、树高、材积分别为36.4 cm、28.7 m、1.3567 m^(3)。胸径生长分为3个阶段,其生长趋势为随着林龄的增加年生长率先升后降最后趋于平缓稳定状态,连年生长量曲线与平均生长量曲线相交于第7~15年,之后生长量逐渐降低。材积生长率总体呈下降趋势,总体而言,材积生长率与年龄呈负相关,随着年龄的增加而减小。最后对观光木进行生长方程拟合并预估了其结果。[结论]该研究揭示了观光木天然林的生长规律,可为其人工林发展提供参考依据。[Objective]The aim of this study was to analyze the growth law of tree height,DBH and volume of Michelia odora.[Method]The growth process of 38 year old Chinese endemic and endangered species of M.odora was studied by using the trunk analysis method.Six growth models(logarithmic equation,power function,logistic equation,Richards equation,Gompertz equation and Korf equation)were selected to analyze the growth law of M.odora.[Result]The average DBH,height and volume of 38 year old M.odora trees were 36.4 cm,28.7 m and 1.3567 m^(3).The growth of DBH could be divided into three stages,and its growth trend was that with the increase of forest age,the annual growth first rose and then decreased,and finally tended to a gentle and stable state.The continuous annual growth curve and the average growth curve intersected in the 7th to 15th years,and then the growth gradually decreased.The volume growth rate showed a downward trend.Generally speaking,the volume growth rate was negatively correlated with age and decreased with the increase of age.Finally,the growth equation of M.odora was fitted and the results were predicted.[Conclusion]This study revealed the growth law of natural forest of M.odora,which could provide reference for the development of artificial forest of M.odora.

关 键 词：观光木 天然林 生长规律 生长模型 

分 类 号：S687.1[农业科学—观赏园艺]