Effects of brewers spent grain on performance and protein digestibility inbroiler chickens
European Journal of Experimental Biology(2013)
摘要
Brewer's spent grain (BSG) is the main waste product from beer production in the most countries; it is often given away and/or used as feed for ruminants. The objective of this study was to evaluate the impact of a gradual replacement of soybean meal with BSG on performance and protein digestibility in broiler chickens. Six diets were formulated in which 0, 5, 10, 15, 20 and 25% BSG replaced soybean meal. A total of 144 Ross-308 broiler chickens divided into 24 pens, and each experimental diet was fed to11-d-old broiler chickens kept in 4 pens. Feed intake, body weight gain and feed: gain ratio were determined for grower (11-24 d), finisher (25-42 d) phases and the overall period of breeding (11-42 d). The ileal protein digestibility was recorded on samples slaughtered at the termination of experiment (d 42), Feed utilization was affected by BSG inclusion only at finisher phase (P<0.05). Feed intake value in control (0% BSG) and 5% BSG groups was greater than that in other groups. Body weight gain in group fed diet with 25% BSG was less than others at grower phase, and feed efficiency was low for this group (P<0.001). Feed: gain ratio was not affected by BSG inclusion at the finisher phase (24-42 d). The ileal digestibility values of protein were significantly increased by some levels of BSG inclusion (P<0.01). To conclude 20% inclusion of BSG at 11-24 d and 5% inclusion of BSG at 25-42 d supports acceptable performance in the broiler chickens.
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关键词
grain,protein
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