Studi Kantung Semar (Nepenthes spp.) di Kawasan Hutan Batang Toru Blok Barat Kabupaten Tapanuli Utara Sumatera Utara

Abstract

A study of kantung semar (Nepenthes spp.) in west area Batang Toru forest North Tapanuli, North Sumatra has been done in August-December 2014. The objective of this study is to observe, diversity, and distribution of Nepenthes species. Study site was determined with purposive random sampling method. Monitoring was done using belt transect method and survey. The survey obtained 5 species, that is N. albomarginata, N. ampullaria, N. gracilis, N. longifolia, and N. rafflesiana. Dominating Nepenthes species in research station is N. longifolia with importance value index of 118,94 %. Diversity Nepenthes is low with 0,81. The study was presented an identification key and characters of Nepenthes species. Nepenthes spp. dominant at 800-1000 masl, rainfall 3500-4000 mm/year, pH 3-6, on the soil humic acrisols 2/3c, and occupied an old secondary forest, swamp forest, and river edge.