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以择伐37年后的阔叶红松林为对象,研究择伐对林内主要树种种内、种间竞争的影响.结果表明:择伐对阔叶红松林主要树种的种群结构、分布格局和竞争指数均产生了极显著影响.各树种的竞争指数变化值与其耐荫性指数存在极显著负相关关系(r=-0.8821).种内竞争强度与聚集强度、个体数呈极显著线性关系,择伐区内枫桦、紫椴等阳性树种的聚集强度最大,种内竞争强度远大于种间竞争,有利于树种之间的共存.择伐降低了红松对其伴生树种的竞争,而阳性树种对其他树种的竞争压力有所上升.择伐37年后,红松所受的竞争压力变化较小,有利于红松的稳定生长;由于自疏作用,枫桦、紫椴的优势度将有所下降;冷杉所受的竞争压力有所减弱,有利于其种群数量的恢复.
The effect of selective cutting on the intraspecific and interspecific competition of main tree species in the forest was studied by selecting the broad-leaved Korean pine forest after selective cutting for 37 years.The results showed that the population structure, distribution pattern and competition of the dominant tree species in the broad- (R = -0.8821) .Individual competitive intensity showed a significant linear relationship with the intensity of aggregation and the number of individuals, and there was a significant negative correlation between the change index of competition index and its shade-tolerance index Coniferous trees such as Betula platyphylla and Tilia amurensis had the highest aggregation intensity, and their competition intensity was much larger than interspecific competition, which was in favor of the coexistence of tree species. The competitive pressure on other species increased.Selective stress after 37 years of isolation, Korean pine is subject to less change in the competitive pressure, is conducive to the stable growth of Korean pine; due to self-sparse, Maple birch, Tilia dominance will have Declined; competitive pressure on fir weakened somewhat, is conducive to the recovery of the population.