袁慧 刘波 陈书杭 朱佳 刘毅 许业洲

摘 要： 為研究湖北省高密度杉木人工林生长规律，对鄂东南地区高密度杉木人工林进行标准地调查，获取61块样地数据和183株解析木数据，建立了杉木单木树高、胸径和材积生长模型，根据拟合优度及残差指标，高密度杉木单木胸径和树高生长的最优模型选择理查德模型，单木材积最优模型选择考尔夫模型，所选模型检验精度均较高，达到拟合效果;通过绘制杉木胸径、树高和材积的生长曲线图，杉木生长量在初始阶段生长速率较大，单木树高和胸径生长量在第4 a达到最大值后逐渐下降，单木材积连年生长量在第10 a达到最大值;利用多元非线性回归建立关于杉木林分平均胸径、平均树高和林分蓄积与林龄、立地指数和林分密度的林分生长模型，选择的林分生长模型均通过检验;利用林分蓄积量的平均生长量和林分平均直径来确定高密度杉木林分的数量成熟龄和工艺成熟龄，在立地指数16～20 m和林分密度4 000～6 000株/hm2时，杉木的数量成熟龄和工艺成熟龄分别为10～13 a、10～11 a，与湖北咸宁地区高密度杉木造林小径级采伐年龄相符。

关键词： 杉木;高密度;生长模型

中图分类号：S718文献标识码：A文章编号：1004-3020（2021）03-0001-08

Growth Regularity of High Density Cunninghamia lanceolata Plantations in Hubei

Yuan Hui（1） Liu Bo（2） Chen Shuhang（2） Zhu Jia（2） Liu yi（3） Xu Yezhou（1）

（1.Hubei Academy of Forestry Wuhan 430075;

2.Xianning Forestry Bureau Qianshan Experimental Forestry Farm Xianning 437100;3.National Nature Reserve of Xingdou Mountain in Hubei Province Enshi 445000）

Abstract： In order to study the growth regularity of high density Cunninghamia lanceolata Plantations in Hubei Province， the authors investigate the high density Cunninghamia lanceolata Plantations in Southeast Hubei Province， obtain 61 sample plots data and 183 analytical wood data， establishe the growth model of the height， DBH and volume of the single Cunninghamia lanceolata. According to the fitting degree and residual index， Richard model is selected as the best model for the growth of the single height and the DBH of the high density， and kolf model was selected as the optimal model for volume growth of single tree. The test accuracy of the selected models was high and the fitting effect was achieved; By drawing the growth curve of DBH， height and volume of Cunninghamia lanceolata， the growth rate of Cunninghamia lanceolata is larger in the initial stage， the growth of single tree height and DBH reaches the maximum in the 4th year and then gradually decreases， and the annual growth of single tree volume reaches the maximum in the 10th year; The stand growth models of average DBH， average height， stand volume， stand age， site index and stand density were established by multiple nonlinear regression; Using the average growth of stand volume and average diameter of stand to determine the quantitative mature age and technological mature age of high-density Cunninghamia lanceolata stand， the quantitative mature age and technological mature age of Cunninghamia lanceolata stand are 10—13 years and 10—11 years respectively when the site index is 16—20 m and the stand density is 4 000—6 000 tree sper hectare， which is consistent with the small diameter age of high-density Cunninghamia lanceolata Plantation in Xianning area of Hubei Province.

Key words： Cunninghamia lanceolata; high density;growth model

杉木Cunninghamia lanceolata是中国特有的速生用材树种，生长快、材质优良、纹理直且具有抵御病虫害能力强等特点，是南方各省区最重要的造林树种之一[1]。中国种植杉木人工林的面积较广，随着杉木经济市场的不断变化，不同规格的杉木材需求量显著增加，小径材也得到广泛利用[2]。……