基于树干解析的30年生江南油杉生长规律研究  

Study on the Growth Law of 30-year-old Keteleeria fortunevar.cyclolepis Based on Stem Analysis

作　　者：李一华 甘明 吴森 黄康庭 LI Yihua;GAN Ming;WU Sen;HUANG Kangting(Guangxi Zhuang Autonomous RegionState-owned Daguishan Forest Farm,Hezhou 542899,Guangxi,China)

机构地区：[1]广西壮族自治区国有大桂山林场,广西贺州542899

出　　处：《桉树科技》2024年第1期52-56,共5页Eucalypt Science & Technology

基　　金：林业公益性行业科研专项(201304108)。

摘　　要：以30年生江南油杉人工林为研究对象,采用标准树干解析分析法,分析胸径、树高和单株材积的生长规律。结果表明:30年生江南油杉的平均胸径为27.9 cm,平均树高18.8 m,实验形数0.44,胸高形率为0.74。胸径年均生长量超过1 cm,其连年生长量在4~8年、13~15年、17~20年3个时期呈现增长波动;树高分为缓慢调整生长期(1~12年)、快速生长期(13~24年)和稳定生长期(25~30年),总平均生长量在24年时达到最大值(0.68 m•年^(−1));前14年单株材积累积量缓慢,为0.0052 m^(3),仅占总材积生长量的1.0%,15~30年则呈现逐年加快的趋势。30年生江南油杉的胸径、材积生长均处于较快增长状态,表明30年生江南油杉尚未达到数量成熟龄和工艺成熟龄。Standard stem analysis was used to study DBH,tree height and tree volume growth in a 30-year-old Keteleeria fortunevar.cyclolepis plantation.The results showed that the average DBH and tree height of 30-year-old K.fortune var.cyclolepis was 27.9 cm and 18.8 m respectively,and the experimental form factor and breast height shape rate were 0.44 and 0.74 respetively.The annual growth rate of DBH was more than 1 cm,and fluctuated in the periods representing tree ages 4~8 years,13~15 years and 17~20 years.Tree height growth could be divided into a slow adjustment growth period(age 1~12 years),a rapid growth period(13~24 years)and a stable growth period(25~30 years).The total average growth reached the maximum value(0.68 m•year^(−1))in the 24th year of age.In the first 14 years,the cumulative volume per plant was 0.0052 m^(3),which accounted for only 1.0%of the total volume growth,and it showed a trend of accelerating year by age period of 15~30 years.In the 30-year-old K.fortune var.cyclolepis trees both DBH and volume were in states of rapid growth,indicating that the 30-year-old K.fortune var.cyclolepis had not reached quantitative maturity nor technological maturity.

关 键 词：江南油杉 解析木 生长规律 生育期划分 

分 类 号：S758.52[农业科学—森林经理学]