Tree quality change of Hopea odorata and Dipterocarpus alatus plantation models in Dong Nai culture nature reserve

Abstract

The study of feature changes the quantity and quality of plants in the plantation model of large and native timber trees (Hopea odorata and Dipterocarpus alatus) in the Area of Natural Conservation, Dong Nai province, to determine fluctuations characterize the survival rate and plantation quality in the different growing techniques. Topical use of survey methods, data collection on the typical plots. The results are: i) Each type of planting methods and specifications that affect plant survival of the species. Overall, survival of H.odorata lower than D.alatus, but deviations are not significant statistically; ii) Survival of the species of plants is a factor closely related to time. The cause of the fluctuations in the current density of trees depends not only on the type of soil, planting methods, planting specifications; and iii) In the planting methods and specifications vary the rate of good quality trees are always more significant than mean plants and
bad plants. At various stages of the species, D.alatus is rather good for rate than H.odorata.