PARAMETERS OF PROTEIN METABOLISM IN GOATS FED DIETS WITH DIFFERENT PORTION OF SUGARCANE BAGASSE

Fifteen Jawarandu male goats were used to study the effect of different portion of sugarcane bagasse in diets on some parameters of protein metabolism. Goats had average of body weight of 18 kg and aged at 18 months. Animals were housed in metabolic cages and were alloted to a completely randomized design receiving three experimental diets with sugarcane bagasse portions of 15, 25, and 35% (dry matter basis), respectively. After eight weeks of adjustment period to experimental diets and environment, each group of treatment was subjected to ten days of digestion trial, and followed by collection of rumen liquid samples. Parameters observed were feed digestibility, nitrogen retention, ruminal feed fermentation, and excretion of urinary allantoin to estimate microbial protein synthesis. Data were tested using one way analysis of variance, and followed by Duncan's mulitiple range test. Dry matter and protein intakes lowered (P<0.05) as the increasing of sugarcane bagasse in diets. Protein digestibility and retention were unaffected by the treatment of bagasse portion. The dietary treatment did not change ruminal ammonia, total VFA, acetate, propionate, and butyrate concentrations. Microbial nitrogen synthesis and efficiency of microbial nitrogen synthesis were unaffected by the dietary treatment.