<b>Digestibility and ruminal parameters of rations containing tilapia filleting by-product silages</b> - DOI: 10.4025/actascianimsci.v28i4.613

Abstract

It was evaluated total and partial digestibility coefficient (DC) of nutrients, ruminal parameters and microbial efficiency synthesis of rations with acid silage of tilapia filleting by-product (ASTB), fermented silage of tilapia filleting by-product (FSTB) and fish meal (FIME). Three Holstein steers (330 kg of body weight) were used, distribute in a 3 x 3 Latin Square Design. The chromium oxide was used as external marker of duodenal and fecal dry matter flow. The total and partial DC of nutrients didn’t differ (p>0.05) among experimental rations. The total DC of ethereal extract was higher (p<0.05) on rations with ASTB and FSTB. The intestinal DC of ethereal extract on ration with FIME was lower (p<0.05) regarding to rations with ASTB and FSTB. There wasn’t inclusion effect of protein sources on pH and ammonia nitrogen concentration of ruminal fluid and microbial efficiency synthesis. The inclusion of 8% of ASTB and FSTB on ruminants’rations can be used without decreasing at nutrients digestion.