EVALUATION OF Lithocarpus fissus Champ. ex Benth. A. Camus PLANTATION MODELS IN SOME NORTHERN PROVINCES

Abstract

This study aims to evaluate the planting techniques, tending, growth, and productivity of several Lithocarpus fissus Champ. ex Benth. A. Camus plantation models in some northern provinces. The research was conducted through the investigation of 12 plantation models, establishing 36 standard plots of 500 m² each, combined with analysis of soil and climate characteristics and planting and tending techniques for Lithocarpus fissus plantations. The results show that Lithocarpus fissus is a relatively fast-growing tree species; under intensive cultivation conditions, the average diameter can reach 2.7 - 3.7 cm/year and the height 1.9 - 2.6 m/year at 2 - 7 years old. Average growth of Lithocarpus fissus can reach 12.1 - 13.6 m³/ha/year at 3 - 7 years old; exceptionally, it can reach 16.3 m³/ha/year at 19 years old. In mixed planting models, Lithocarpus fissus tends to suppress some other native tree species due to its wider canopy and significantly faster growth. The study proposes technical measures regarding site preparation, planting density, seed sources, planting techniques, care, and nurturing of Lithocarpus fissus plantations to provide large timber in som Northern provinces.