Abstract
An experiment was carried out to examine the effects of supplemental dietary arginine (ARG) on growth, hypertensive response, and gut function in broilers reared at high altitude (2,100 m). A total of 120 day-old male broilers (Cobb 500) were divided equally into two treatment groups. Treatments included a control basal diet composed of corn and soybean meal and an experimental diet to which an l-ARG supplement was added at 10 g/kg. The trial lasted for 42 days. There were no treatment differences with regard to feed intake, body weight gain, or feed conversion ratio. However ARG supplementation did increase the plasma concentration of nitric oxide, a potent vasodilator (P < 0.05), and attenuated indices of pulmonary hypertension as reflected by reductions in the hematocrit and the right to total ventricular weight ratio (P < 0.05). Significantly enhanced intestinal mucosal development was observed in broilers receiving ARG supplement when compared with controls (P < 0.05), suggesting that ARG supplementation increased the absorptive surface area of the jejunum and ileum. In conclusion, broiler diets supplemented with ARG beneficially improved pulmonary hemodynamics and appeared to enhance gut function.
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Acknowledgments
This research was supported by Shahrekord University, Shahrekord, Iran. The authors thank Dr. Robert F. Wideman from the University of Arkansas for editing the manuscript.
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Khajali, F., Moghaddam, M.H. & Hassanpour, H. An l-Arginine supplement improves broiler hypertensive response and gut function in broiler chickens reared at high altitude. Int J Biometeorol 58, 1175–1179 (2014). https://doi.org/10.1007/s00484-013-0710-7
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DOI: https://doi.org/10.1007/s00484-013-0710-7