辽东山区蒙古栎天然次生林生长规律研究  

Study on the growth of Quercus mongolica natural secondary forest in mountainous area in Eastern Liaoning Province

作　　者：汪成成[1] 刘红民[1] 董莉莉[1] 高英旭[1] 赵济川 WANG Chengcheng;LIU Hongmin;DONG Lili;GAO Yingxu;ZHAO Jichuan(Liaoning Academy of Forestry,Shenyang 110032,China)

机构地区：[1]辽宁省林业科学研究院,辽宁沈阳110032

出　　处：《辽宁林业科技》2021年第2期1-5,31,共6页Liaoning Forestry Science and Technology

基　　金：国家重点研发计划项目(2017YFC050410502);辽宁省“兴辽英才计划”项目(XLYC1902081)。

摘　　要：以辽东山区蒙古栎天然次生林为研究对象,采用72株不同林龄的蒙古栎解析木数据构建胸径、树高和材积生长模型,并对其生长过程进行分析。结果表明:Korf方程拟合胸径和材积生长效果最好,Gompertz方程拟合树高生长效果最好,R2值分别为0.881 0、0.823 3和0.902 5,使用未参加建模的解析木数据对最优模型进行t检验,实测值与预测值之间无显著差异(P> 0.05),能够用于辽东山区蒙古栎天然次生林生长过程的预测。蒙古栎胸径生长的旺盛期为5~35 a,连年生长量的峰值出现在10 a,平均生长量的峰值出现在20~25 a,连年生长量曲线与平均生长量曲线相交在25~30 a;树高生长的旺盛期为5~40 a,连年生长量呈现3次峰值,最大峰值出现在10 a,平均生长量的峰值出现在15 a,连年生长量曲线与平均生长量曲线相交在15~20 a;材积生长在5~10 a非常缓慢,10 a以后生长速度明显加快,35 a以后材积生长持续旺盛,直到80 a仍未达到数量成熟龄。蒙古栎胸径和树高连年生长量在10 a后开始下降,表明此时林木间竞争加剧,对营养空间需求有所增加,因此建议在10 a时对林分进行密度控制,减小林木间的竞争,促进胸径和树高生长。In this paper,the natural secondary forest of Quercus mongolica in mountainous area in eastern Liaoning province was taken as the research object,the growth models of DBH,tree height and volume of 72 Q. mongolica trees of different ages were established based on the stem analysis of Q. mongolica. The results showed that Korf equation was the best fit for DBH and volume growth,while Gompertz equation was the best fit for tree height growth,with R2 values were 0. 8810,0. 823 3 and 0. 902 5,respectively. The test was performed on the optimal model using stem analysis data not contained in the model,and it showed there was no significant difference between the measured value and the predicted value( P >0. 05),which could be used to predict the growth process of natural secondary forest of Q. mongolica in mountainous area in eastern Liaoning province. The vigorous growth period of Q. mongolica DBH was 5 ~ 35 a,the peak value of annual growth was 10 a,the peak value of average growth was 20 ~ 25 a,the intersection of the curves of annual growth and average growth was at 25 ~ 30 a. The vigorous growth period of Q. mongolica tree height was 5 ~ 40 a,the annual growth rate showed three peaks,the maximum peak occurred at 10 a,the peak value of average growth was 15 a,the intersection of the curves of annual growth and average growth was at 15 ~ 20 a. The volume growth was very slow from 5 a to 10 a,and obviously became fast after 10 a,and continued to grow vigorously after 35 a. The trees still didn’t reach the quantitative maturity age at 80 a. The annual growth of DBH and tree height began to decrease after 10 a,which indicated that the competition between trees was intensified and the demand for nutrient space was increased. Therefore,it was suggested to control the stand density at 10 a to reduce the competition and promote the growth of DBH and tree height.

关 键 词：辽东山区 蒙古栎天然次生林 生长模型 生长过程 

分 类 号：S792.186.06[农业科学—林木遗传育种]