Objectives and methodology of the STREK project

Abstract

STREK is an acronym of the «Development of Silvicultural Techniques for the Regeneration of logged-over rain forests in East Kalimantan». The objectives of this project were to develop management rules leading to sustained productivity of the forests in this area, which are the main suppliers of wood industry in Indonesia. This project was scheduled over a seven-year period (1989-1996).
In the Berau PT. INHUTANI I concession, two sites of 1 000 ha each were selected. On the first site, logged in 1978-1979, six plots of 4 ha each were set up. Two different silvicultural treatments were tested, with 2 control plots. On the second site, covered by primary forest until 1991, 12 plots of 4 ha each were set up. Three control plots marked out and three logging treatments with three replications were implemented: two Reduced-Impact Logging techniques (RIL) with two different diameter limits (> 50 and > 60 cm) and one called «conventional». In these plots, all trees with dbh ≥ 10 cm were measured, numbered and mapped on a scale of 1: 200.
A database comprising about 40 000 trees was set up with botany, typology and pedology as well as silvicultural data, which is a prerequisite to carry out further growth and yield studies.