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为探究树木径向生长的影响因子,基于对长白山阔叶红松林25 hm~2样地中3个常见树种红松、紫椴、蒙古栎连续5年的生长环监测数据,分析各树种的季节生长变化,比较树种间的生长速率差异,并分析初始径级、邻体树木竞争、土壤、地形因素等对不同树种径向生长的作用.结果表明:3个树种径向生长的季节变化趋势一致,树木于5月末开始生长,7月是生长旺盛期,8月底生长开始减缓,于10月中下旬停止生长.3个树种的径向相对生长率存在显著差异,蒙古栎相对径向生长率显著高于红松和紫椴,该差异在小、中径级个体中表现更为显著.3个树种径向生长的主要影响因子不同,邻体树木的竞争显著抑制了红松和蒙古栎的径向生长,而紫椴的径向生长主要受初始径级、土壤和地形等因子的影响.
In order to explore the influencing factors of tree radial growth, based on the monitoring data of growth rings of three common species, Pinus koraiensis, Tilia amurense and Quercus mongolica, in 25 hm ~ 2 plots of the broad-leaved Korean pine forest in Changbai Mountains for five years, Growth, and the difference of growth rate among species were compared, and the effects of initial diameter class, adjacent tree competition, soil and topographical factors on the radial growth of different tree species were analyzed. The results showed that the seasonal variation of radial growth of the three tree species was consistent , The trees began to grow at the end of May, July was the vigorous growth period, and the growth began to slow down at the end of August, and stopped growing in the middle and late October of 2010. The relative radial growth rate of the three species was significantly different, and the relative radial growth rate of Quercus mongolica was significant Higher than that of Korean pine and Tilia amurensis, the difference was more significant in small and medium diameter individuals.The main influencing factors of the radial growth of the three species were different, and the competition of adjacent trees significantly inhibited the diameter of Pinus koraiensis and Quercus mongolica To grow, while the radial growth of Tilia amurensis mainly by the initial diameter class, soil and topography and other factors.