Optimasi Fermentasi Limbah Ubi Kayu Sebagai Pakan Ruminansia: Evaluasi Kecernaan NDF, ADF, Selulosa, Dan Hemiselulosa

Abstract

This study aimed to optimize the fermentation of cassava waste as ruminant feed by adjusting the inoculum level and fermentation duration, as well as to evaluate the in vitro digestibility of the fiber fraction. The study used a 4 × 4 factorial Complete Randomized Design with three replicates, resulting in 48 experimental units. The first factor was inoculum level, namely 0%, 2%, 4%, and 6%, while the second factor was fermentation duration of 7, 14, 21, and 28 days. The parameters observed included the digestibility of Neutral Detergent Fiber (NDF), Acid Detergent Fiber (ADF), cellulose, and hemicellulose. The results showed that an increase in inoculum level increased NDF digestibility from 44.59% to 59.60%, ADF from 33.66% to 48.28%, cellulose from 40.80% to 58.05%, and hemicellulose from 54.28% to 70.58%. Based on fermentation duration, the highest values were obtained on day 21, namely NDF 57.39%, ADF 45.73%, cellulose 55.00%, and hemicellulose 68.65%. The optimal combination was a 6% inoculum over 21 days, resulting in NDF digestibility of 64.80%, ADF digestibility of 53.20%, cellulose digestibility of 63.10%, and hemicellulose digestibility of 76.20%. The 21-day fermentation period was deemed the most promising, while a 4% inoculum over 21 days has the potential to serve as an efficient alternative for sustainable ruminant feed.