PSVIII-11 Effects of feeding diets containing corn distiller’s dried grains with solubles (DDGS) on growth performance in broilers: a meta-analysis

Abstract

Abstract Published studies involving different feeding strategies and diet inclusion rates of corn distillers dried grains with solubles (cDDGS) for broilers have resulted in variable growth performance responses. Therefore, a meta-analysis was conducted to quantitatively summarize the impact of feeding diets containing cDDGS on growth performance of broilers using a total of 16 publications with 56 observations in the database. The mean difference (MD) of BWG, FI, and G/F ratio were expressed as percentage between feeding corn-soybean meal-based (CSB) diet and addition of cDDGS into CSB diet of broilers. Individual observations were analyzed using a multivariable model (Proc GLIMMIX, SAS) to evaluate growth performance responses based on feeding phase, inclusion level of cDDGS, and oil content of cDDGS as a fixed effect. Broilers fed cDDGS diet had decreased BWG (-0.1 %, P < 0.01) and increased FI (0.3 %, P < 0.01) compared with broilers fed CSB diet. Moreover, every percentage unit increase in the inclusion level of cDDGS in CSB diet was associated with a decrease in BWG (0.30 %, P < 0.01) and FI (2.64 %, P < 0.01). The MD of BWG was greater for broilers fed cDDGS in the starter (4.70 %, P < 0.01) and entire (3.00 %, P < 0.01) period compared with the finisher feeding period. However, entire feeding period showed greater MD of G/F ratio (2.11 %, P < 0.01) compared with starter and finisher periods. The MD of BWG (-1.02 %, P < 0.01) and FI (-2.48%, P < 0.01) were decreased for broilers fed more than 20 % in the diet. In conclusion, including more than 20 % cDDGS into the broiler diet decreased BWG and FI. The recommended inclusion level of cDDGS into the broiler diet is 10 to 20 % during the entire period.