Energy balance and methane emission prediction in Simmental Cross-breed Cattle Feeding different types of forages and concentrates

Abstract

This study aims to examine the energy balance of Simmental Cross-breed Cattle given different forage and different proportion of concentrates. This research was conducted at Izzah Farm, Boyolali Regency, Central Java. The material for this research consisted of nine bulls with an average initial body weight of 506±80.09 kg. The research design used a completely randomized design with three treatments and three replications each treatment. The feed proportion was 70:30 (concentrate:forage). The treatments were T1=pollard bran+rice bran (1:4) and kolonjono grass, T2 = pollard bran+rice bran (1:4) and fermented rice straw, and T3 = pollard bran+commercial concentrate (1:4) and fermented rice straw. Data were analysed using the Anova test. The results of this study showed that there was no difference (P<.05) in digested energy and metabolized energy with an average of 1.01 MJ/BB0.75/day and 0.77 MJ/BB0.75/day. Energy intake was 1.65 MJ/BB0.75/day. Energy digestibility and methane emission emission were significantly different with an average of 60.22% and 7.40 KJ/100 KJ GEI. The conclusion of this study is that ransom containing pollard bran+commercial concentrate (1:4) and Fermented Rice Straw has low methane emission.