The effect of low-glucosinolate rapeseed meal in diets with multi-enzyme supplement on performance and protein digestibility in broiler chicks
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Department of Animal Science, Islamic Azad University, Khorasgan (Isfahan) Branch, 81595-158 Isfahan, Iran
Department of Animal Science, Isfahan Agricultural Research Centre, 81785-199 Isfahan, Iran
Publication date: 2009-03-20
Corresponding author
M. Toghyani   

Department of Animal Science, Islamic Azad University, Khorasgan (Isfahan) Branch, 81595-158 Isfahan, Iran
J. Anim. Feed Sci. 2009;18(2):313-321
Three hundred and eighty-four day-old Ross broiler chicks were used in a completely randomized experimental design with 4×2 factorial arrangements using four rapeseed meal (RSM) levels with and without a multi-enzyme preparation. RSM levels included: A: control (without RSM); B: 5, 10 and 15%; C: 10, 15 and 20%; D: 15, 20 and 25% RSM in starter, grower and finisher periods, respectively. Body weight gain and feed conversion ratio in treatments B and C were similar to controls, but in treatment D, weight gain decreased and FCR increased (P<0.05). Feed intake of broilers was not affected by different levels of RSM (P>0.05). Enzyme supplementation had no significant effect (P>0.05) on growth performance but resulted in a significant increase in ileal digestibility of protein (P<0.05). Feeding high levels of RSM (Treatment D) significantly increased liver and gizzard weights and decreased abdominal fat (P<0.05).
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