The effect of feeding different sources and levels of selenium on growth performance and antioxidant status of broilers raised at two different temperatures

被引:11
|
作者
Woods, S. L. [1 ]
Rose, S. P. [1 ]
Whiting, I. M. [1 ]
Ionescu, C. [2 ]
Blanchard, A. [2 ]
Pirgozliev, V. [1 ]
机构
[1] Harper Adams Univ, Natl Inst Poultry Husb, Newport, Shrops, England
[2] Pancosma, Rolle, Switzerland
关键词
Chickens; selenium; performance; antioxidant status; temperature; OXIDATIVE STRESS; HEAT-STRESS; DIETARY SELENIUM; PARAMETERS; SUPPLEMENTATION; STABILITY; NUTRITION; QUALITY; MUSCLE;
D O I
10.1080/00071668.2020.1782350
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
1. This study examined the effects of different dietary sources and levels of selenium (Se) on growth performance, hepatic and breast meat Se content, glutathione peroxidase (GSH-Px) activity and total antioxidant status (TAS) in blood, when fed to broilers from 14 to 35 d of age and reared at two different temperatures (20 degrees C and 35 degrees C). 2. Five hundred and sixty male Ross 308 broilers were reared in a single floor pen and fed the same proprietary starter diet from 0 to 14 d age (229.9 g/kg CP and 12.67 MJ/kg ME, without Se supplementation). 3. The experiment started at 14 d age, and the birds randomly assigned to 112 raised-floor pens (0.36 m(2)area, 5 birds/pen). Each of the seven experimental diets were offered to birds in 16 pens within four rooms. Two rooms were at 20 degrees C and two rooms were maintained at 35 degrees C. The experimental diets were fed from 14 to 35 d age and contained 214.9 g/kg CP and 13.11 MJ/kg ME. The experimental diets were as follows; control diet containing background Se only (0.189 mg/kg; C); low level sodium selenite (0.376 mg/kg; LSS): high level sodium selenite (0.558 mg/kg; HSS); low level commercial B Traxim (R) Se (0.244 mg/kg) (LBT); high level B Traxim (R) Se (0.448 mg/kg; HBT); low level selenised yeast (0.290 mg/kg; LSY); high level selenised yeast (0.487 mg/kg; HSY). 4. Birds consumed more when raised at 20 degrees C compared to birds reared at 35 degrees C (P <= 0.05). Birds fed lower Se level reared at 35 degrees C had higher weight gainversusthose fed higher Se level (P < 0.05). Birds fed SY had the lowest feed intake, weight gain and FCE (P < 0.05). The greatest GSH-Px activity was observed in birds fed SS diets (P < 0.001). There were interactions between diet x level for TAS, which were highest in birds fed LBT compared to birds fed HBT (P < 0.05). Breast Se content was higher in birds fed HSY compared to LSY (P < 0.001). The highest hepatic Se was seen in birds fed SY and lowest in C (P < 0.001). 5. Birds fed BT diets showed similar levels of Se to those birds fed inorganic Se, and similar levels of GSH-Px to birds fed SY. Further comparative work with broilers fed BT and other Se supplemented diets may elucidate the findings from this report.
引用
收藏
页码:669 / 675
页数:7
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