Nonruminant Nutrition: DDGS
نویسندگان
چکیده
High-fiber content of distillers dried grains with soluble (DDGS) is partially responsible for its low ME, which may be increased with dietary inclusion of non-starch polysaccharidase (NSPase). Broiler chicks (7-d-old, 6 chicks/pen, 6–7 pens/diet) were randomly allotted to 4 treatments with free access to feed and water. Corn and DDGS (20%) diets were supplemented or not with a proprietary mixture of NSPase. DDGS diets were formulated to be deficient only in ME (90% of corn diets). In wk 2, average weekly weight gain (AWG), gain:feed, and apparent ME (AME) of the chicks receiving corn diets were higher (P < 0.001) than DDGS diets. DDGS+NSPase increased (P < 0.08) AME by 9.4% but had no effect on AWG. In wk 3, AWG and gain:feed were higher (P < 0.001) in chicks receiving corn diets compared with DDGS diets. NSPase inclusion improved (P < 0.04) AWG in both corn (312 vs. 338 g) and DDGS (262 vs. 283 g) diets. DDGS+NSPase increased (P < 0.007) AME by 11.7%, which made this diet comparable in energy to both corn diets. However, AWG of chicks fed DDGS+NSPase was lower (P < 0.005) than chicks eating the corn diets, regardless of NSPase inclusion. The main effect of NSPase inclusion during the 2-wk assay was an increase in standardized ileal digestibility (SID) of all amino acids (P < 0.003). Overall energy restriction reduced SID of Pro, Leu, Phe, and Ala (P < 0.05). Regardless of diet, age increased (P < 0.05) amino acid SID except for Ser, His, Thr, Val, and Ala. Results indicate the ability of a mixture of NSPase to increase AME of ME-deficient diets containing 20% DDGS. Further, a lag in AWG response at equal AME suggests a metabolic adaptation in birds to the use the reducing sugars freed by NSPase for growth.
منابع مشابه
Nonruminant Nutrition: DDGS
Three experiments were carried out to evaluate the growth performance and breast yield of broiler chickens fed diets with increasing levels of DDGS and the additions of different enzymes to compensate the energy reduction in DDGS-added diets. In all the experiments Ross B308 male broilers were individually fed. In Exp. 1, 96 broilers from 21 to 35 d of age were used and assigned to 8 treatments...
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