红松人工林不同经营密度与红松分杈的关系

采用野外调查法，对人工红松纯林、混交林的密度与红松分杈的关系进行了研究。结果表明：无论是纯林还是沸交林，随着经营密度的逐渐增大，分杈率、分杈类型及分杈高等均表现出相应的规律性变化。在人工纯林中，密度越大，分杈率越低；分杈类型倾向于单杈型；分杈高度亦表现出明显升高。在人工混交林中，随着密度的增大，分杈率与分杈类型表现出相似的规律，但分杈高并无明显的规律可循。在密度相近的情况下，红松混交林中的红松分杈

The Relationship between the Plantation Density of Pinus koraiensis and Its Forking

In this paper, the relationship between the density of Pinus koraiensis plantation and its forking was studied. The result shows that the forking ratio, the forking style and the forking height change regularly with the increase of the plantation density. In the pure plantation, the forking ratio decreases, the forking style tends to develop to single-forked style and the forking height increases with the increase of the density. In the mixed stand, the forking ratio and the forking style is similar to the situation in the pure plantation with the increase of density, but the forking height is irregular. Under the similar density, the forking ratio and the forking height is lower in the pure plantation than in the mixed stand, and the ratio of the single-forked trees is higher in the mixed stand than in the pure plantation.