The suitability of forest tree species for enrichment planting at PT Semitau Region, West Kalimantan

Abstract

Forest tree enrichment can improve biodiversity and ecosystem functions. Tree enrichment planting in the riverside rehabilitation area of palm oil plantation needs to be monitored to prevent the risk of erosion and sedimentation. However, regular monitoring of enrichment planting is not yet optimally carried out including the benefits and identified suitable species through field observations. This study was aimed to determine the three most suitable tree species to be recommended for enrichment planting in the riverside rehabilitation areas at PT Semitau Region oil palm plantation. Samples were determined through a combination of linear systematic sampling methods. The measured variables included the survival percentage, health, diameter, height, light intensity, and soil analysis. The results showed that the three species had the best adaptability, namely kawi (Shorea balangeran), pulai (Alstonia spp.), and ubah (Syzygium darifolium) with 21%, 15%, and 10% dominance frequency, respectively. Total dominance frequency of 45 % for all three species are expected to be useful information for increasing successfully riverside rehabilitation area of oil palm plantation.