Effect of xylanase on performance, serum IGF-1 and glucose of broilers fed wheat corn soybean diet
Journal of Animal and Veterinary Advances
College of Animal Science, South China Agricultural University, 510542 Guangzhou, China; Department of Animal Science, Kano University of Science and Technology Wudil, Kano, Nigeria; Production Technology Department of WENs Group, Yunfu, China
Six hundred and forty, 1 day old Yellow feather broiler chicks were fed wheat-corn soybean diet plus xylanase ENOLZYME™ 100 g ton-1 (enzyme activity = 1256.244 U mL-1) to study additive effect of the enzyme on serum glucose and IGF-1 concentration relative to performance. The birds were randomly divided into 2 treatment groups with 64 birds/pen in 5 replicates. For the periods of 63 days body weight, feed efficiency and daily feed intake were not differed at 21 and 42 days. However, they were all differ significantly at 63 days (p<0.05); particularly feed efficiency from 1-63 days was highly significant (p<0.01). Carcass characteristics were not differed in all three stages but at finishing stage breast and thigh muscles, heart, gizzard and abdominal fat weights were numerically increased. Mortality rate was <0.02%. Serum glucose concentration levels at three feeding phases were not differed among groups. However, serum IGF-1 differ significantly at starter phase (21 days) (p<0.05). Correlation between treatments and feeding periods existed at growing (42 days) and finishing (63 days) stages (p<0.05). The present findings on supplementation of xylanase to corn wheat soy bean broiler diet hasincreased market weight cost value by 1.33% at finishing stage (43-63 days). The serum glucose and IGF-1 concentration have correlated positively on treatments offered, feeding periods and performance. Further research is needed on IGF-1 and GH (Growth Hormone) at molecular level to understand their influence in broiler's growth and development. © Medwell Journals, 2013.