Nghiên cứu đặc điểm tái sinh tự nhiên của cây gỗ trong các ưu hợp họ Dầu (dipterocarpaceae) tại Vườn Quốc gia Cát Tiên, tỉnh Đồng Nai

Abstract

Data of this research was collected from 30 typical temporary sample plots with the size of 0.25 hectares. There were 5 sample plots in each Dipterocarpaceae domination. Data categories collected in the Dipterocarpaceae dominations included composition of wooden species height of trees (H < 300 cm) and natural regeneration status under the forest canopy. The data was analyzed and compared by statistical methods in plant community ecology. Research results showed that the lowest regeneration is Hopea odorata (34 species), the highest is in dominations of Dipterocarpus dyeri (54 species). The coefficient of similarity between the regenerated tree composition and the composition of the mother tree was high from 86.3% in the dominations of Anisoptera costata to 96.2% % in the dominations of Dipterocapus alatus. All of them prove that the composition of the tree species of these six plant dominations is stable during development. The dominations of Dipterocarpaceae have the ability to regenerate very well under the forest canopy. Regeneration trees of six dominations of Dipterocarpaceae are predominantly from seeds. Most of regeneration trees were existed at H < 100 cm. Distribution on the ground of regeneration trees of Dipterocarpaceae forms clusters.