山西太岳山三种树种伐桩萌芽条竞争规律的研究

Study on the Intraspecific Competition Rules of Three Tree Species Stump Plant in Taiyue Mountain Shanxi Province

根据太岳山三种树种萌芽更新的调查数据,采用Hegyi的单木竞争指数模型对伐桩内萌芽条之间的竞争强度进行了定量分析。结果表明,伐桩内平均竞争强度随着萌芽条数目的增大而逐渐增大;随着萌芽条平均胸径的增大而逐渐减小。竞争木对对象木的竞争强度与对象木总数以及个体大小均服从幂函数关系,竞争强度与对象木总数呈显著的正相关关系,与个体大小呈显著的负相关关系。结合偏相关分析得出,影响伐桩内平均竞争指数较大的因子是伐桩内萌芽条总数。

Sprout plant data which were quantity analyzed in competition intensity within stump through Hegyi competition index model of single tree were investigated in Taiyue Mountain . It showed that the average competition intensity escalated with the increase of sprout plant amount within stump, and decreased with the average diameter enlargement. Competitive tree on object tree with the competition intensity and the total number of object tree were subordinate of the individual function of size. The correlation is positive between competition intensity and individual, but it was negative with individual size. Cooperating with partial correlation analysis, the main factor which affected the average competition index was the amount of sprout plant within stump.