Life Sciences Commons^™

Effects Of Protease, Phytase And A Bacillus Sp. Direct-Fed Microbial On Nutrient And Energy Digestibility, Ileal Brush Border Digestive Enzyme Activity And Cecal Short- Chain Fatty Acid Concentration In Broiler Chickens, G. R. Murugesan, L. F. Romero, M. E. Persia

G. R. Murugesan

Two experiments were conducted to determine the effects of protease and phytase (PP) and a Bacillus sp. direct-fed microbial (DFM) on dietary energy and nutrient utilization in broiler chickens. In the first experiment, Ross 308 broiler chicks were fed diets supplemented with PP and DFM in a 262 factorial arrangement. The 4 diets (control (CON), CON + PP, CON + DFM, and CON + PP + DFM) were fed from 15–21 days of age. In Experiment 1, significant interaction (P#0.01) between PP and DFM on the apparent ileal digestibility coefficient for starch, crude protein, and amino acid indicated that both …

Influence Of A Direct-Fedmicrobial And Xylanase Enzyme On The Dietary Energy Uptake Efficiency And Performance Of Broiler Chickens, G. R. Murugesan, M. E. Persia

G. R. Murugesan

BACKGROUND: Efficacy of a multi-strain direct-fed microbial product (PoultryStar® ME; PS) and a xylanase enzyme product on the dietary energy utilization efficiency and resulting performance in broiler chickens was evaluated. Apart from performance parameters, cecal and serum metabolites and activities of hepatic enzymes involved in energy metabolism were also determined. Ross 308 chicks were fed one of four experimental diets [control (CON), CON + PS, CON + xylanase and CON + PS + xylanase] using a 2×2 factorial arrangement from 1–21 days of age.

RESULTS: Cecal proportions of propionate and butyrate, as well as total short-chain fatty acid concentration were …