Effects of low ambient temperatures and dietary vitamin C supplement on growth performance, blood parameters, and antioxidant capacity of 21-day-old broilers
Effects of low ambient temperatures and dietary vitamin C supplement on growth performance, blood parameters, and antioxidant capacity of 21-day-old broilers
复制标题
低环境温度和日粮补充维生素C对21日龄肉鸡生长性能、血液参数和抗氧化能力的影响
DOI：
10.3382/ps.2013-03438
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发表时间：
2014-04-01
期刊：
影响因子：
4.4
通讯作者：
Wang, J. P.
中科院分区：
文献类型：
--
作者：
Yang, X.;Luo, Y. H.;Wang, J. P.
本研究旨在探讨低温（LAT）和维生素C（VC）对21日龄肉仔鸡生长性能、血液指标和抗氧化能力的影响。将总共400只1日龄雄性Cobb肉鸡分配到以下4个处理中的一个：1）LAT和基础日粮; 2）LAT和补充有1，000 mg VC/ kg的基础日粮（LAT + VC）; 3）正常环境温度（NAT）和基础日粮; 4）NAT和补充有1，000 mg VC/ kg的基础日粮（NAT + VC）。所有鸡均饲喂至21日龄。第1组和第2组的肉鸡在1至7 d期间在24至26 ℃下饲养，在8至21 d期间在9至11 ℃下饲养，而第3组和第4组在1至7 d期间在29至31 ℃下饲养，在8至21 d期间在24至26 ℃下饲养。LAT在整个试验期内显著提高了料肉比（P < 0.01），在21 d时显著提高了心脏指数（P < 0.05），在14 d时显著提高了红细胞压积和血红蛋白水平（P < 0.05）。21日龄时，日粮中添加VC可显著提高红细胞压积、血红蛋白和红细胞计数（P < 0.05）。21 d时，LAT处理降低了血清、肝脏和肺脏的总抗氧化能力（P < 0.05），升高了血清和肝脏的VC含量、肝脏和肺脏的蛋白质羰基化量以及肺脏的丙二醛含量（P < 0.05）。添加VC有提高血清总抗氧化能力的趋势（P < 0.1）。低环境温度导致1 ~ 21日龄肉仔鸡出现氧化应激，而日粮中添加VC对抗氧化活性无显著影响。
The study was conducted to determine the effects of low ambient temperature (LAT) and a vitamin C (VC) dietary supplement on the growth performance, blood parameters, and antioxidant capacity of 21-d-old broilers. A total of 400 one-day-old male Cobb broilers were assigned to 1 of 4 treatments as follows: 1) LAT and a basal diet; 2) LAT and a basal diet supplemented with 1,000 mg of VC/ kg (LAT + VC); 3) normal ambient temperature (NAT) and a basal diet; 4) NAT and a basal diet supplemented with 1,000 mg of VC/ kg (NAT + VC). All birds were fed to 21 d of age. Broilers in groups 1 and 2 were raised at 24 to 26 degrees C during 1 to 7 d, and at 9 to 11 degrees C during 8 to 21 d, whereas groups 3 and 4 were raised at 29 to 31 degrees C during 1 to 7 d and at 24 to 26 degrees C during 8 to 21 d. The LAT increased the feed conversion ratio during the whole experimental period (P < 0.01), whereas it increased heart index at 21 d (P < 0.05) and hematocrit and hemoglobin level at 14 d (P < 0.05). Supplementing the diet with VC increased hematocrit, hemoglobin, and red blood cell count at 21 d (P < 0.05). At 21 d, LAT conditions decreased total antioxidant capacity in the serum, liver, and lungs (P < 0.05), and it also increased the levels of VC in the serum and liver, the amount of protein carbonylation in liver and lungs, and the malondialdehyde level in the lungs (P < 0.05). The addition of VC tended to increase the total antioxidant capacity level in serum (P < 0.1). Low ambient temperature resulted in oxidative stress for broilers that were fed from 1 to 21 d of age, whereas no significant effect was found on the antioxidant activity by dietary VC supplementation.