Analisis Vegetasi Tumbuhan bawah di Kawasan Deleng Macik Taman Hutan Raya Bukit Barisan Kabupaten Karo Sumatera Utara

Abstract

Research entitled Vegetation Analysis Of Ground Cover In Deleng Macik Region, Taman Hutan Raya, District Of Karo, North Sumatera had been conducted from may to july 2016. The target of this research to know variety and composition of ground cover. The studysite was chosen purposively with 100 plots of 2 x 2 m underzig-zag placement along transect. Result of research at location there are of total sixty ground cover species were found in this study which divided into two divisions: Pteridophyte with 17 species from 8 families and Spermatophyte with 43 species from 18 families. Homalomena griffithii, Argostemma uniflorum and Cyartandra oblongifolia had the highestrank of Importance Value Index (IVI) which were 19,259 %, 11,996% and 9,674% respectively.Three families namely Araceae, Rubiaceae and Cyatheaceae had the highest rank of IVI which were 40,20%, 17,08% dan 12,11% respectively. The highest diversity and equitability index of ground cover is 3,734% and 0,912% respectively. The highest index of species richness were from 61 species of Vrydagzynea sp. belonging to Orchidaceae.

Analisis Vegetasi Tumbuhan Bawah Di Kawasan Deleng Macik Taman Hutan Raya Bukit Barisan Kabupaten Karo Sumatera Utara telah dilaksanakan pada bulan Mei sampai Juli 2016. Tujuan Penelitian ini untuk mengetahui keanekaragaman tumbuhan bawah dan komposisi penyusunnya. Areal pengamatan ditentukan secara purposive sampling metode kuadran dengan jumlah 100 plot berukuran 2 x 2 m susunan zig-zag terhadap transek. Hasil penelitian menunjukkan bahwa pada lokasi penelitian terdapat 60 jenis tumbuhan bawah yang terdiri dua divisi yaitu Pteridophyta sebanyak 17 jenis dalam 8 suku dan Spermatophyta sebanyak 43 jenis yang termasuk kedalam 18 suku. Jenis Homalomena griffithii, Argostemma uniflorum dan Cyrtandra oblongifolia adalah memiliki Indeks Nilai Penting tertinggi secara berurutan yaitu 19,259 %, 11,996% dan 9,674%. Suku Araceae, Rubiaceae dan Cyatheaceae adalah suku Indeks Nilai Penting tertinggi yaitu 40,20%, 17,08% dan 12,11%. Indeks keanekaragaman tumbuhan bawah yaitu 3,734% sedangkan Indeks keseragaman yaitu 0,912%. Indeks kekayaan jenis yaitu 61 pada jenis Vrydagzynea sp. suku Orchidaceae.