Notes on Pinus kesiya and Pinus merkusii and their natural regeneration in watershed areas of Northern Thailand.

Abstract

Seedlings and young pine trees were almost exclusively found in Pinus kesiya stands only. Dense pine stands generally showed less vigorous natural regeneration. Poor regeneration was also associated with a high frequency of forest fires. Sowing experiments indicated a slower development and a higher susceptibility to damage in P. merkusii seedlings compared to those of P. kesiya. Drought was the main cause for low germination and survival percentage.-from Authors