Abstract: This paper studies the regeneration density of different types of forest gaps,the number and causes of the edge of wood.The results showed that gaps are generally formed by 11 to 24 larch and birch trees with an average number of 16.94 trees, which includes standing dead trees, broken trees and uprooted trees. Of those trees, 11.8% are broken trees, 353% dead standing trees and 41.2% uprooted trees. Gap where the slope was lower in 58.9% and slope position,41.1% were in the upper slope.Ledum leaves in the forest,grass and moss larch forest regeneration density by the limiting factors are different.In the larch forest Ledum gap regeneration is mainly affected by the impact of slope,grass leaf pines,mainly by the length of the gap regeneration of the axis ratio,moss larch forest gap edges of wood mainly by the number of edge trees.

Key words: Larix gmelinii forest, forest type, regeneration density, gap regenenation