KUALITAS FISIK JERAMI JAGUNG AMONIASI PADA BERBAGAI LAMA PEMERAMAN

Universitas Muhammadiyah Bone

Abstract

This study described the physical quality of urea-treated corn stover after 14, 21, 28, and 35 days of incubation. Four separately prepared mixtures, each containing 800 g stover, 24 g urea, and 50 mL water, were divided among four jars assigned to the incubation durations, yielding 16 experimental units. Three assessors scored odor, color, texture, and visible mold on a four-point scale. Assessor scores were reduced to one median per jar and summarized across four jars per duration. Exploratory Friedman tests used exact within-block permutations and Holm adjustment, with each source mixture forming one block containing all four durations. Median odor and color scores were 4.00 at 14 and 21 days and 3.00 at 28 and 35 days. Corresponding texture medians were 4.00 and 3.50; all mold scores were 4.00. Adjusted p-values for odor, color, and texture were 0.167, 0.042, and 0.250, respectively. Adjusted paired color comparisons were not significant. Incubation for 14 or 21 days warrants further evaluation based on physical quality, but no single optimal duration was established.