Perbandingan Ketelitian Alat Ukur dalam Pengukuran Diameter Pohon di Hutan Rakyat

Abstract

Pengukuran diameter pohon merupakan salah satu cara untuk menduga potensi tegakan hutan di hutan rakyat. Pengukuran diameter pohon dapat dilakukan menggunakan phiband, tongkat bitterlich, spiegel relascope bitterlich (SRB), dan criterion. Tujuan penelitian membandingkan hasil pengukuran diameter pohon pada berbagai alat ukur diameter pohon. Parameter yang diamati meliputi bias, ketelitian, dan ketepatan. Pemilihan jenis pohon dipilih secara sengaja (purposive) menggunakan 150 pohon contoh dan dilakukan pembandingan nilai bias, simpangan baku, mean square error, dan uji-t berpasangan. Hasil penelitian menunjukkan pita ukur sebagai alat ukur yeng direkomendasikan dalam pengukuran diameter batang pohon karena memiliki hasil bias kecil, ketelitian dan ketepatan tinggi pada pohon contoh.

Measurement of tree diameter is one way to estimate the potential of forest stands in private forest. Measurement of tree diameter can be done using a measuring tape, phiband, bitterlich stick, spiegel relascope bitterlich (SRB), and criterion. The purpose of the study was to compare the results of measuring tree diameters on various measuring instruments with those of tree diameters. The parameters observed include bias, accuracy, and precision. The selection of tree species was chosen purposively using 150 sample trees and the values of bias, standard deviation, mean square error, and paired t-test were compared. The research results show that the measuring tape as a measuring instrument is recommended in measuring the diameter of tree trunks because it has small refractive results, accuracy and high accuracy in sample trees.