摘要
糠椴次生林是东北地区典型的森林类型之一,其结构和生长受到多种环境因素尤其是坡位差异的显著影响.基于样地数据,探讨了不同坡位对糠椴次生林结构和生长的影响,分析了上坡、中坡和下坡的林分结构特征、胸径和树高分布,以及单木材积和林分蓄积的变化规律.结果表明,不同坡位糠椴占比均不超过 50%,处于混交状态,伴生树种主要为蒙古栎、山杨和胡桃楸.不同坡位糠椴胸径与树高均呈极显著正相关.坡位显著影响糠椴生长,下坡糠椴胸径、树高和单木材积和林分蓄积均显著高于上坡和中坡.
Abstract
Tilia mandshurica secondary forest is one of the typical forest types in Northeast China,and its structure and growth are significantly affected by various environmental factors,especially differences in slope position.Based on the field plot data,the effects of different slope positions on the structure and growth in Tilia mandshurica secondary forest were explored.The stand structure,diameter at breast height,and height distribution of Tilia mandshurica at upper,medium,and lower slope positions were analyzed,as well as the variation patterns of individual volume and stand volume.These results indicate that the proportion of Tilia mandshurica in different slope positions is less than 50%,belonging to a mixed forest,with associated tree species mainly including Quercus mongolica,Populus davidiana,and Juglans mandshurica.There was an extremely significant positive correlation between the diameter at breast height and height of Tilia mandshurica at different slope positions.The slope position significantly affected the growth of Tilia mandshurica,with the diameter at breast height,height,individual volume,and stand volume of Tilia mandshurica at lower slope positions being significantly larger than those at upper and medium slope positions.
国家科技期刊平台
NSTL
万方数据