The proportion of middle timbers in wind broken trees isrespectively: 87.3% in larch-birch forests, 67% in larch-alder forests, 59% in larch forestswith ledum and 75% in larch forests with brushes.

• 可见，不论何种林型，掘根倒木以大径木为主，风折倒木以中径木为主。丛桦林风折木中，中径木占的比例是87.；3%25，赤杨林的此一比例为67%25，杜香林为59%25，草类林为75%25。