| Penulis/Author |
GITA NOFRIANTIKA (1); Ir. Andriyani Astuti, S.Pt., M.Sc., Ph.D., IPM., ASEAN Eng. (2) ; Prof. Dr. Ir. Ali Agus, DAA., DEA., IPU., ASEAN Eng. (3); Ir. Cuk Tri Noviandi, S.Pt., M.Anim.St., Ph.D., IPM., ASEAN Eng. (4); Dimas Hand Vidya Paradhipta, S.Pt., M.Sc., Ph.D. (5); Ahmad Sofyan (6); S. Quigley (7); D Poppi (8) |
| Abstrak/Abstract |
he present study investigated the effect of varying the proportion of dried cassava and palm kernel cake on in situ rumen degradation kinetics in Ongole Crossbreed. Ongoles were fed two different concentrate rations of cassava and palm kernel cake (PKC) varying in percentage with one concentrate mixture comprising 80?ssava with 20% PKC and the other concentrate mixture was 50?ssava mixed with 50% PKC. Each concentrate mixture was fed with rice straw to make a total mixed ration of approximately 80% rice straw and 20% concentrate. Each ration was fed to one of two rumen fistulated cattle in a cross-over design. Each period was of two weeks with an adaptation period. In situ degradation was measured in the second week. A sample of the mixed concentrate was measured into each nylon bag such that the proportion of cassava or PKC was the same as the ration concentrate being fed ie 80:20 or 50:50 cassava:PKC respectively. Each mixed concentrate treatment (5 g) was weighed in quadruplicate into nylon bags and then incubated in the rumen for 4, 8, 16, 24, 48, 72, and 96 h, removed at these times, dried and analysed for DM and organic matter. The degradation kinetics of dry matter and organic matter were higher (P<0.05) in the 80:20 concentrate treatment than the 50:50 concentrate treatment. The immediately degradable fraction, the potentially degradable fraction, fractional degradation rate, and theoretical degradability were higher (P<0.05) in the 80:20 concentrate treatment thanthe 50:50 dietary treatment even though this had a higher crude protein content. In conclusion, degradation rate of the 80:20 cassava concentrate was higher and reflected the higher starch content of this mixed ration. It would be the better concentrate mixture as a supplement but if fed at high levels the 50:50 concentrate mixture would be a safer option to avoid acidosis. |
