关键词: 长白山, 森林动态样地, 次生杨桦林, 树木生长, 树木死亡, 径级

Abstract: The breeding ecology of Coracia pyrrhocorax in Pangquangou Natural Reserve were studied from March to December, 1985-1991. The studies included habitats, population density, bree ding, food,and etc. The bird bred from March to July, mating system was monogamy. The bird began nesting in March, began to lay eggs between middle to late March, laying one egg per day, and the clutch size was 4-6. Incubation period was 18-22 days, and the hatching success rate was 94.20%. Brooding periods was 25-31 days in the nest and 11-15 days after fledging.

Key words: Changbai Mountains, forest dynamic sampling plot, secondary poplar-birch forest, tree growth, tree death, size class.