EROSI TANAH PADA AREAL TANAM RUMPANG DAN HUTAN ALAM TERDEGRADASI DI PT. SARMIENTO PARAKANTJA TIMBER

Abstract

Gap Planting and Gap Cutting (TRTR) is a silvicultural system that utilizes the phenomenon of natural forest succession by planting fast-growing species in gap areas. TRTR is expected to increase productivity in degraded natural forests. This study aims to determine the rate of soil erosion in the gap planting research area and degraded natural forest at PT. Sarmiento Parakantja Timber. The research was conducted on two slope classes: flat-gentle and moderate. The methods used in the study consist of the erosion stick method, ANOVA, and independent statistical tests. The study results show that the highest soil erosion occurs in degraded natural forest areas, followed by the erosion in barrier areas and in the planting strips. The statistical test results show that soil erosion in degraded natural forest areas, erosion in barrier areas, and in planting strips is significantly different. Similarly, the effect of flat-gentle slopes and moderate slopes on the extent of erosion in gap areas is also significantly different. However, the amount of erosion occurring in degraded natural forest areas and gap areas is not significantly different.