EFFECTS OF ADDITION OF NITROGEN ADDITIVES AND VARYING FERMENTATION DAYS ON ORGANOLEPTIC CHARACTERISTICS OF ENSILED RICE MILLING WASTE

Abstract

An experiment was conducted to study the effects of urea and poultry litter as additives and fermentation days on quality of ensiled rice milling waste. Mixture consisting rice milling waste with urea or poultry litter was ensiled, with three experimental treatments: (T1) rice milling waste without additive (control); (T2) rice milling waste 95% and urea 5% and (T3) rice milling waste 70% and poultry litter 30% on dry matter basis of mixture, respectively using Completely Randomized Design (CRD). All treatments were packed into an open-mouthed kilner jar (cope Bs 910-8, 100mL) for 20
days at room temperature (28 – 30oC). During fermentation process sample per treatment was taken at days; 0, 5, 10, 15, and 20. The result showed that the pH value of all mixed silages significantly increases (p<0.05) with ensiling time except for the control in which no significant (P>0.05) changes in pH values were observed throughout the ensiling days. Similarly, significant in Color and aroma were observed in mixed silages (T2 and T3) across the fermentation days in comparison with control silage. The overall findings of this study suggested that addition of 5% urea in rice milling waste
silage could improve its quality for ruminants’ animals’ production.