Growth Rate Of Red Jabon And Teak Trees From Plantation Forest

Abstract

Red jabon (Anthocephallus macrophyllus Roxb. Havil) and teak (Tectona grandis Linn. f) is fast- and slow-growing tree species that are widely planted in Indonesia. Both species have high adaptability to grow in various types of soils. The development of red jabon and teak plantation forests and the utilization of their wood produced require knowledge of their growth rates. The information on the growth rate is important because it is closely related to forest sustainability. Climatic elements such as rainfall, rainy day, temperature, humidity, and duration of irradiation are important factors in tree growth. The purpose of this study was to study the growth rate i.e. the annual increment of red jabon and teak trees and their relationship with climatic elements. Observations were made for one year, namely 2021. This study used descriptive analysis to describe the growth rate; while Pearson's correlation was used to evaluate the relationship between the growth rate and climate elements. The results showed that the diameter increment of the red jabon tree per year was 2.21 cm, while for teak was 0.34 cm per year. A significant relationship between the growth rate of the jabon tree and climatic elements can be seen in rainfall, rainy days, and humidity; while temperature and duration of irradiation did not have a significant correlation. In teak trees, a significant relationship was seen only on a rainy day and humidity; while rainfall, temperature and irradiation time are not significantly correlated.