Study of silviculture characteristic of tropical humid evergreen broadleaf closed forest in Ma Da region, Dong Nai province

Abstract

In order to provide scientific basic used to propose forest management methods in Dong Nai’s culture and nature reserve, the study of “Understanding of silviculture characteristics of forest types: IIB, IIIA2, IIIA3” was conducted. The results show that: In terms of forest structure: IIB type has 67 woody species, which belongs to 50 genus and 29 families; forest type IIIA2 consists of 55 woody species belonging to 41 genus and 25 families; forest type IIIA3 has 67 woody
species that belongs to 46 genus and 25 families. N - D distribution of the three forest types is the same which has reduced distribution. Distribution of the N - H of type forest IIIA3 is a form of misses a top and obtuse, and distribution of the N - H of state forest IIB and IIIA2 are the form of misses
a top and acute. Natural regeneration density for the three forest types is 11.700 trees/ha, 11.100 trees/ha and 9.400 trees/ha for IIB, IIIA2 and IIIA3 forest types, respectively. Most of the natural regeneration seedlings are from seed (91.5%), growing well (58.6%). The similarity index between mother trees and seedlings reanges from 38 to 44%. Number of tree species, species richment, uniformity of richment and species diversity of IIB’s type are higher than that of IIIA2 and IIIA2. Regeneration diversity increases gradually from IIB; IIIA2 and IIIA3.