Abstract: A study of storage of fallen trees and effect of fallen trees on regeneration of PICEAFir forest in Changbai mountains.The study revealed that the volume of dead woods in primitive PICEA-Fir forest was 241.7 m~3/hm~2;the volume of dead woods was 66.gm~3/hm~2 in over-cutting PICEA-Fir forest.The number of seedlings on dead wood was declining wih the size classes growing.The number of dead woods was occupied 96% and the vomule was occupied 97.2% of Ⅲ,Ⅳ,Ⅴ decay classes in primitive PICEA-Fir forest.The dead woods only exit in Ⅲ and Ⅴ decay classes in over-cutting PICEA-Fir forest,the number of dead woods was occupied 79.4% and volume was occupied 70.8% of V decay classes.The number of seedlings was mostly accumulated on large diameter portion and center of dead woods.

Key words: PICEA-Fir forest, Dead woods, Storage, Regeneration

CLC Number: 

• S754