Dietary Betaine Reduces the Negative Effects of Cyclic Heat Exposure on Growth Performance, Blood Gas Status and Meat Quality in Broiler Chickens
Majid Shakeri, Jeremy J Cottrell, Stuart Wilkinson, Hieu H Le, Hafiz AR Suleria, Robyn D Warner, Frank R Dunshea
Agriculture | MDPI | Published : 2020
Heat stress (HS) impairs growth performance and has a severe impact on lipid and protein metabolism, leading to serious adverse effects on meat quality. Forty-eight day-old-male Ross-308 chicks were assigned to two temperature conditions, thermoneutral or cyclical HS, and fed with either a control diet (CON) or the CON plus betaine (BET). Heat stress increased rectal temperature (p < 0.001), respiration rate (p < 0.001) and increased blood pH (p = 0.017), indicating that HS caused respiratory alkalosis. Heat stress reduced body weight during the final stage of growing period (p = 0.005), while BET improved it (p = 0.023). Heat stress tended to reduce breast muscle water content and drip loss..View full abstract
This experiment was supported by The University of Melbourne, Melbourne International Research Scholarship and Melbourne International Fee Remission Scholarship.