PENGARUH JARAK TANAM TERHADAP PERTUMBUHAN DIAMETER Shorea parvifolia Dyer.

Abstract

Plantation productivity is influenced by many factors such as: plant spacing, light intensity, and plant species. High quality planting materials with appropriate spacing and optimum environmental condition appear to be dominant factors that determine planting success. Shorea parvifolia Dyer. is one of the most valuable and fast growing tree species belongs to Dipterocarpaceae family. The growth of S. parvifolia at seedling stage needs shading with close planting space, but wide planting space is for the next stage of the growth. The objective of this study was to identify appropriate plant spacing to increase S. parvifolia growth in natural forest. The result of this study indicated that diameter of S. parvifolia at five years old with spacing of 1 m x 1 m; 1.5 m x 1.5 m; 2 m x 2 m; and 3 m x 3 m, are 6.7 cm, 7.3 cm, 7.3 cm, and 8.9 cm, respectively. Diameter increment for plantation at 1-5 years old with similar spacing were 1.61 cm, 1.20 cm, 1.94 cm, 1.32 cm, and 1.14 cm, respectively and in 35 years the diameter of this species is expected to reach 50.47 cm