【摘要】：本試驗(yàn)旨在研究飼糧不同硒添加水平對(duì)1~21日齡嶺南黃羽肉仔雞生長(zhǎng)性能和抗氧化性能的影響,以探討快大型嶺南黃羽肉仔雞飼養(yǎng)前期的飼糧硒適宜供給量。選用1日齡健康、發(fā)育良好的快大型嶺南黃羽肉公雛雞1 200只,根據(jù)體重隨機(jī)分為5個(gè)組,每組6個(gè)重復(fù),每個(gè)重復(fù)40只雞,試驗(yàn)1組(對(duì)照組)飼喂基礎(chǔ)飼糧(硒水平為0.039 mg/kg),試驗(yàn)2~5組飼糧在基礎(chǔ)飼糧中分別添加0.075、0.150、0.225和0.300 mg/kg硒,試驗(yàn)期21 d。結(jié)果表明:本試驗(yàn)條件下:1)與對(duì)照組相比,飼糧添加0.300 mg/kg硒顯著降低1~21日齡嶺南黃羽肉仔雞的末重(P0.05),顯著提高料重比(P0.05),且0.300 mg/kg硒添加組的平均日增重顯著低于其他各水平硒添加組(P0.05)。2)與對(duì)照組相比,飼糧添加0.075和0.150 mg/kg硒顯著提高21日齡嶺南黃羽肉仔雞的血漿谷胱甘肽過(guò)氧化物酶(GSH-Px)活性(P0.05),飼糧添加0.225和0.300 mg/kg硒顯著降低血漿丙二醛(MDA)含量(P0.05)。各水平硒添加組的紅細(xì)胞GSH-Px活性均顯著高于對(duì)照組(P0.05)。3)與對(duì)照組相比,飼糧添加0.075、0.150和0.225mg/kg硒顯著提高21日齡嶺南黃羽肉仔雞的肝臟GSH-Px活性(P0.05),0.075和0.150 mg/kg硒添加組的肝臟MDA含量顯著低于對(duì)照組和0.300 mg/kg硒添加組(P0.05)。綜合考慮,為獲得較好生長(zhǎng)性能和抗氧化性能,1~21日齡嶺南黃羽肉仔雞飼糧硒適宜添加水平為0.075 mg/kg,基礎(chǔ)飼糧中硒水平為0.039 mg/kg,則1~21日齡嶺南黃羽肉仔雞飼糧硒適宜供給量為0.114 mg/kg;以肝臟MDA含量為依據(jù),通過(guò)非線性回歸分析估測(cè)得到1~21日齡嶺南黃羽肉仔雞飼糧硒適宜供給量為0.130 mg/kg。
[Abstract]:The purpose of this study was to study the effects of different dietary selenium levels on growth performance and antioxidant activity of 1-day-old Lingnan yellow feather broilers, and to explore the appropriate dietary selenium supply for fast and large Lingnan yellow feather broilers in the early stage of feeding. 1 200 fast large Lingnan yellow feather male chicks, healthy and well developed, were randomly divided into 5 groups according to their body weight, 6 replicates in each group and 40 chickens in each replica. Group 1 (control group) was fed with basic diet (selenium level was 0.039 mg/kg). In experiment 2, the diets of group 2 were supplemented with 0. 075 (0.150) and 0.300 mg/kg selenium, respectively, for 21 days. The results showed that the ratio of 1 to 1 in this experiment was higher than that in the control group. Dietary supplementation of 0.300 mg/kg selenium significantly decreased the end weight of Lingnan yellow feather broiler (P0.05), significantly increased the feed weight ratio (P0.05), and the average daily gain of the 0.300 mg/kg selenium added group was significantly lower than that of the other levels of selenium addition group (P0.05) compared with the control group. Dietary selenium of 0.075 and 0.150 mg/kg significantly increased plasma glutathione peroxidase (GSH-Px) activity of 21-day-old Lingnan yellow broilers (P0.05), and dietary supplementation of 0.225 and 0.300 mg/kg selenium significantly decreased plasma malondialdehyde (MDA) content (P0.05). The erythrocyte GSH-Px activity of selenium added group was significantly higher than that of control group (P0.05). The liver GSH-Px activity of 21-day-old Lingnan yellow feather broilers was significantly increased by dietary supplementation of 0.075 and 0.150 and 0.225mg/kg selenium (P0.05). The content of MDA in liver of the groups supplemented with 0.075 and 0.150 mg/kg se was significantly lower than that of the control group and 0.300 mg/kg se added group (P0.05). Taking into account, In order to obtain better growth performance and antioxidant activity, the optimum dietary selenium supplementation level was 0.075 mg/kg, for Lingnan Yellow Feather broiler, and 0.039 mg/kg, for Lingnan Yellow Feather broiler at 1 ~ 21 days of age, while 0.114 mg/kg; for Lingnan Yellow Feather broiler at 1 ~ 21 days. Based on the content of MDA in liver, The optimum dietary selenium supply of Lingnan yellow feather broiler was estimated to be 0.130 mg/kg. by nonlinear regression analysis.
【作者單位】： 廣東省農(nóng)業(yè)科學(xué)院動(dòng)物科學(xué)研究所畜禽育種國(guó)家重點(diǎn)實(shí)驗(yàn)室農(nóng)業(yè)部華南動(dòng)物營(yíng)養(yǎng)與飼料重點(diǎn)實(shí)驗(yàn)室廣東省動(dòng)物育種與營(yíng)養(yǎng)公共實(shí)驗(yàn)室廣東省畜禽育種與營(yíng)養(yǎng)研究重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家肉雞產(chǎn)業(yè)技術(shù)體系項(xiàng)目(CARS-42) 國(guó)家“十二五”科技支撐計(jì)劃項(xiàng)目(2014BAD13B02)
【分類號(hào)】：S831.5

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