title: Effects of Supplemental Chromium Propionate on Serum Lipids, Carcass Traits, and Meat Quality of Heat-Stressed Broilers.
abstract: This study was conducted to investigate the effects of chromium from chromium propionate (CrPro) on serum lipids, carcass traits, and breast meat quality in heat-stressed birds. A total of 210 1-day-old male broilers were randomly allotted by initial body weight (BW) into 5 treatments with 7 replicates with 6 birds per replicate pen for 42 days. The treatments included a basal corn-soybean meal diet and basal diet supplemented with 0.2, 0.4, 0.8, or 1.6 mg Cr/kg diet. Birds had ad libitum access to feed and distilled-deionized water at normal conditions for 1-3 weeks with little or no stress, and then birds were housed under heat stress conditions with 35 ± 2 °C ambient temperature for 4-6 weeks. Results showed that serum triglyceride (TG) (P = 0.0006) and low-density lipoprotein cholesterol (LDLC) (P = 0.0038) concentrations were decreased linearly as Cr dose increased. Compared with other groups, birds receiving 0.8 or 1.6 mg Cr/kg had lower TG (P = 0.0015). Compared to control birds, birds fed diets with 0.2, 0.4, 0.8, or 1.6 mg Cr/kg supplementation had lower LDLC (P = 0.0006). However, the total cholesterol (TC) and high density lipoprotein cholesterol (HDLC) concentrations in serum were not affected by treatment (P > 0.05). No difference was observed in BW, the relative weights of breast muscle, thigh muscle and abdominal fat (P > 0.05), and breast meat quality (Ph15min, Ph24h,L*, a*, b*, cooking loss, shear force) among the treatments (P > 0.05). Results from this study indicated that CrPro supplementation could be beneficial to serum lipids metabolism of heat-stressed broiler chickens by decreasing TG and LDLC contents, but had no impacts on meat quality and carcass traits of the heat-stressed broilers.
authors.affiliation: College of Life Science and Technology, Southwest University for Nationalities, Chengdu, 610041, People's Republic of China.
authors.forename: Fang
authors.initials: F
authors.lastname: Xiao
authors.affiliation: College of Life Science and Technology, Southwest University for Nationalities, Chengdu, 610041, People's Republic of China.
authors.forename: Degulina
authors.initials: D
authors.lastname: Ao
authors.affiliation: College of Life Science and Technology, Southwest University for Nationalities, Chengdu, 610041, People's Republic of China.
authors.forename: Bo
authors.initials: B
authors.lastname: Zhou
authors.affiliation: Department of Animal Science, North Carolina State University, Raleigh, NC, 27695-7621, USA.
authors.forename: Jerry W
authors.initials: JW
authors.lastname: Spears
authors.affiliation: Department of Animal Science, North Carolina State University, Raleigh, NC, 27695-7621, USA.
authors.forename: Xi
authors.initials: X
authors.lastname: Lin
authors.affiliation: College of Life Science and Technology, Southwest University for Nationalities, Chengdu, 610041, People's Republic of China. swunylh@163.com.
authors.forename: Yanling
authors.initials: Y
authors.lastname: Huang
mesh_terms: D000818:Animals; D002645:Chickens; D008078:Cholesterol, LDL / Q000097:blood*; D019587:Dietary Supplements; D018882:Heat Stress Disorders / Q000097:blood / Q000378:metabolism*; D006358:Hot Temperature; D008297:Male; D008460:Meat / Q000032:analysis / Q000592:standards*; D011422:Propionates / Q000008:administration & dosage* / Q000378:metabolism / Q000494:pharmacology*; D014280:Triglycerides / Q000097:blood*
chemical_list: D008078:Cholesterol, LDL; D011422:Propionates; D014280:Triglycerides; C029658:propionic acid
keywords: Carcass traits; Chromium; Heat-stressed broilers; Meat quality; Serum lipids