首页|Viscosity and growth response of broilers fed high fiber diets supplemented with a corn-produced recombinant carbohydrase
Viscosity and growth response of broilers fed high fiber diets supplemented with a corn-produced recombinant carbohydrase
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NSTL
Elsevier
Feed ingredients containing high levels of non-starch polysaccharides (NSP), such as wheat and corn distillers' dried grains with solubles (DDGS), can form viscous digesta in the gastrointestinal tract, limiting broiler performance. A study was conducted to determine efficacy of a corn-produced recombinant carbohydrase (AC1) on dietary and intestinal viscosity and broiler performance with a high NSP diet. Hubbard x Ross 708, a day old, male broiler chicks (n = 960) were fed 1 of 8 dietary treatments for 21 d. Diets included a corn-soybean meal based diet (PC 1) and a diet of similar essential nutrient density, but with a 10% inclusion of both wheat and DDGS (PC 2) and a negative control (NC) with similar ingredients as PC 2, but with ME reduced by 125 kcal/kg. Additional treatments had varying levels of AC1, supplying 50, 100, 200, 400, or 600 U beta-Glucanase (beta-Glu-U) per kg of feed, mixed into the NC diet. Dietary and digesta (d14) viscosity and weekly bird performance were measured. The inclusion of wheat and DDGS increased d1-7 feed conversion ratio (FCR) and supplementing AC1 at 50-400 beta-Glu-U/kg reduced FCR equivalent to PC 1. Intestinal viscosity correlated with d1-21 FCR and inversely correlated with d1-21 live weight gain (LWG). When analyzed categorically, dietary viscosity inversely correlated with d1-21 LWG (P < 0.05). This study demonstrates that AC1 can reduce intestinal viscosity and improve early FCR in birds fed high viscosity diets and that in vitro viscosity can correlate to broiler performance.
viscositynon-starch polysaccharidebroilerenzyme
Ayres, V. E.、Broomhead, J. N.、Li, X.、Raab, R. M.、Moritz, J. S.
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West Virginia Univ, Div Anim & Nutr Sci, Morgantown, WV 26506 USA
NSTL
Elsevier
