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1.
《饲料与养殖》2006,(3):8-9
本试验目的旨在探讨饲粮中添加共轭亚油酸（CLA）对肉仔鸡生长性能、脂质代谢、屠体性能及组成的影响。240只1日龄肉仔鸡随机分为4个（0%、0.25%、0.5%和1%CLA）日粮处理组，饲喂6周。结果表明：CLA对肉仔鸡的生长性能，脂质代谢没有显著影响（P〉0.05）。42日龄时，肉仔鸡的心脏、肝脏、脾脏指数在各处理间没有显著差异（P〉0.05），0.5%和1%CLA组内仔鸡胸肌率显著高于对照组（P〈0.05），1%CLA组肉仔鸡42日齿腿肌率显著高于对照组，肉仔鸡的腹脂率在各处理之间没有显著差异（P〉0.05）,1%CLA组肉仔鸡胸肌蛋白与脂肪比显著高于对照组（P〈0.05）。试验结果表明：CLA对肉仔鸡的生长性能及脂质代谢的影响不显著，可以改善体组成。  相似文献   

2.
共轭亚油酸对14日龄断奶仔猪部分免疫指标的影响   总被引：4，自引：0，他引：4  
为了确定共轭亚油酸(CLA)对14日龄断奶仔猪免疫功能的影响,进行了本试验。试验选用72头14 d断奶、体重为(4.04±0.04)kg的杜×(大×长)三元杂交仔猪,随机分成4个处理,每个处理3个重复,每个重复6头猪(公母各1/2)。调整各个处理的CLA和葵花籽油添加量(以CLA替代部分葵花籽油),使对照组不含CLA,试验组分别含0.5%、1.0%和1.5%CLA。饲养试验分3个阶段进行:14~28日龄为第1阶段,29~42日龄为第2阶段,43~56日龄为第3阶段。试验结果显示,试验第28天(42日龄),1.0%和1.5%CLA组血液PHA淋巴细胞转化率显著提高(P<0.05),所有试验组血清前列腺素E2(PGE2)水平显著低于对照组(P<0.05);试验第42天(56日龄),1.5%CLA组肿瘤坏死因子-α(TNF-α)水平显著高于对照组(P<0.05),1.5%CLA组仔猪血清PGE2显著降低(P<0.05);1.0%CLA组肝组织过氧化物酶体增殖物激活受体-γ(PPAR-γ)mRNA显著高于其他组(P<0.05),1.5%CLA组结肠黏膜PPAR-γmRNA显著高于其它组(P<0.05)。以上结果表明,饲粮中添加1.0%~1.5%的CLA能够有效提高超早期断奶仔猪的部分免疫指标。  相似文献   

3.
本试验旨在研究饲粮中同时添加共轭亚油酸(CLA)和鱼油对雄性肉鸡屠体性状、肌肉脂肪酸组成和脂质过氧化状态的影响。120只21日龄雄性爱拔益加(AA)肉仔鸡随机分配到4个组:豆油组(2%)、CLA组(2%)、鱼油组(2%)和混合组(1%CLA+1%鱼油)。每个组6个重复,每个重复5只鸡。42日龄屠宰取样。试验结果如下:混合组肉仔鸡的胸肌率和腿肌率与CLA组和鱼油组没有显著差异(P0.05)。CLA组、鱼油组和混合组肉仔鸡的腹脂率显著低于豆油组(P0.05)。鱼油组和混合组肉仔鸡胸肌中脂肪含量均显著低于CLA组(P0.05)。CLA组和混合组肉仔鸡的胸肌和腿肌中饱和脂肪酸含量均极显著高于鱼油组(P0.01),单不饱和脂肪酸含量显著低于鱼油组(P0.05)。鱼油组和混合组胸肌和腿肌中n-3多不饱和脂肪酸(n-3 PUFA)的含量,特别是C20∶5、C22∶5和C22∶6含量,均极显著高于CLA组(P0.01)。肉仔鸡胸肌和腿肌中C20∶5、C22∶5和C22∶6的含量在鱼油组和混合组之间没有显著差异(P0.05)。混合组肉仔鸡胸肌和腿肌的脂质过氧化水平均显著低于鱼油组(P0.05)。结果表明,CLA和鱼油在肉仔鸡胸肌和腿肌的不饱和脂肪酸尤其是n-3 PUFA的沉积和脂质稳定性方面有一定的互补作用。  相似文献   

4.
试验采用2×2因子设计(日粮类型0或1%CLA,长沙黄或爱拨益加肉仔鸡)研究日粮CLA对两个品种肉仔鸡生长性能、屠体性状和脂肪代谢的影响。结果表明,日粮中添加1%CLA可以显著增加两个品种肉仔鸡各阶段的体增重,改善4~6周和0~6周的饲料转化效率(P<0.05),提高胸肌率(P<0.05)、降低腹脂率(P<0.05)和腹脂脂蛋白脂酶(LPL)活性及其mRNA相对表达量(P<0.05)。爱拨益加肉仔鸡(AA)的生长性能、胸肌率、腹脂率、血液总胆固醇(TC)及高密度脂蛋白胆固醇(HDL-C)均高于长沙黄肉仔鸡(P<0.05)。除血液总胆固醇及高密度脂蛋白胆固醇指标外,品种和日粮CLA对肉仔鸡生长性能、屠体性状和LPL的影响不存在互作关系。  相似文献   

5.
益生素对肉仔鸡生长性能、屠体性状及肉品质的影响   总被引：16，自引：0，他引：16  
本文旨在研究饲粮中使用益生素(乳酸菌CAU6001)对肉仔鸡生长性能、屠体性状及肉品质的影响。试验选择360只健康1日龄的商品代AA肉仔鸡,随机分成对照组、抗生素组和益生素组,每组4个重复,每个重复30只鸡。试验期42 d。对照组饲喂基础日粮,抗生素组饲喂基础日粮 100 mg/kg金霉素,益生素组饲喂基础日粮 0.5%乳酸菌发酵液。结果表明:(1)益生素对肉仔鸡各阶段日增重和料肉比无显著性影响,抗生素对日增重有一定促进作用,其中2~4周龄阶段差异显著(P<0.05);(2)益生素能显著提高肉仔鸡胸肌率(P<0.05),与对照组和抗生素组相比分别提高了7.15%和4.38%;(3)通过对42日龄肉品质分析,发现益生素对肌肉肉色的a*值和b*值显著提高(P<0.05),极显著提高鸡脚颜色(P<0.01),分别比对照组和抗生素组提高9.5和8.9个罗氏比色单位;(4)益生素组C16∶1显著高于对照组(P<0.05),C20∶3显著高于抗生素组(P<0.05),校正肌苷酸含量高出对照组和抗生素组10.04%和8.48%(P<0.05),益生素对胸肌中多数氨基酸含量起到显著影响,并且部分人体必需氨基酸和风味氨基酸含量显著高于对照组(P<0.05)。  相似文献   

6.
牛磺酸对肉仔鸡屠宰性能和肌肉品质的影响   总被引：1，自引：0，他引：1  
本研究旨在探讨牛磺酸对肉仔鸡屠宰性能和肌肉品质的影响。选用240只1日龄艾维茵肉仔鸡,随机分为5组,每组3个重复。对照组饲喂玉米-豆粕型基础日粮,试验组在基础日粮中添加0.05%、0.10%、0.15%和0.20%的牛磺酸,试验期42 d。结果表明:(1)日粮中添加0.10%牛磺酸能够显著降低42日龄肉仔鸡胸肌失水率和粗脂肪含量(P<0.05),显著提高胸肌pH和粗蛋白质含量(P<0.05);(2)添加0.15%的牛磺酸显著提高42日龄肉仔鸡胸肌率和瘦肉率(P<0.05),显著降低皮脂厚(P<0.05),显著提高胸肌pH和粗蛋白质含量(P<0.05),显著降低胸肌粗脂肪含量(P<0.05);(3)0.20%的牛磺酸显著提高胸肌pH、肉色和粗蛋白质含量(P<0.05)。  相似文献   

7.
饲粮添加共轭亚油酸对肉仔鸡肠道黏膜免疫反应的影响   总被引：1，自引：0，他引：1  
本试验旨在研究饲粮添加共轭亚油酸(conjugated linoleic acid,CLA)对肉仔鸡肠道黏膜免疫反应的影响。试验选用72只1日龄健康、体重相近的爱拔益加(AA)雄性肉仔鸡,随机分配到对照组和CLA组,分别饲喂基础饲粮和在基础饲粮中添加1%CLA的饲粮,每组6个重复,每个重复6只鸡。21日龄屠宰取样。结果表明:CLA组肉仔鸡空肠食糜分泌型免疫球蛋白A(secretory immunoglobulin A,SIgA)含量(P<0.01)和空肠SIgA基因mRNA表达水平(P<0.01)均高于对照组;饲粮添加CLA显著提高肉仔鸡空肠过氧化物酶体增殖物激活受体γ(PPARγ)基因mRNA表达水平(P<0.01),但转化生长因子β4(transforming growth factor-β4,TGFβ4)基因mRNA表达水平在2组之间没有显著差异(P>0.05);CLA组肉仔鸡Peyer氏结CD8+T细胞亚群百分数(P<0.01)和淋巴细胞转化率(P<0.05)均显著高于对照组。由此可见,饲粮添加1%CLA提高了21日龄肉仔鸡空肠SIgA水平,激活PPARγ可能是CLA调节SIgA表达的途径之一。饲粮添加1%CLA影响21日龄肉仔鸡空肠黏膜细胞免疫功能。  相似文献   

8.
试验选择180只1日龄健康AA+肉仔鸡,按日粮中柠檬酸添加剂量的不同(0%、0.75%、1.5%)分为3个日粮处理组,每个处理组6个重复,每个重复10只鸡,进行为期42d的饲养试验,旨在研究日粮中添加不同梯度的柠檬酸对肉仔鸡屠宰性能的影响。试验结果表明:添加0.75%柠檬酸可显著提高21日龄肉仔鸡的屠宰率(P0.05),极显著提高腿肌率(P0.01),胸肌率和全净膛率却显著降低于对照组(P0.05);添加1.5%柠檬酸可使21日龄肉仔鸡的全净膛率显著降低(P0.05),对其他屠宰性能指标无显著影响。  相似文献   

9.
研究菟丝子对1~42日龄肉仔鸡免疫和抗氧化指标的影响。选用1日龄肉仔鸡180只,随机分为3个处理,每个处理6个重复,每个重复10只鸡。对照组(DZ组)饲喂基础饲粮;菟丝子试验组(TS组)饲喂基础饲粮+2%菟丝子;酒炙菟丝子试验组(JTS组)饲喂基础饲粮+2%酒炙菟丝子。在第21 d和42 d测定肉仔鸡血清中的免疫指标、免疫器官指数及抗氧化指标。结果表明:(1)与对照组相比,酒炙菟丝子显著提高了21日龄肉仔鸡的血清LZM活性(P<0.05)、胸腺指数(P<0.05),并且显著提高了42日龄肉仔鸡的血清GLB水平(P<0.05)、脾脏指数(P<0.05)、血浆GSH-Px活性(P<0.05),显著降低了42日龄肉仔鸡的胸肌MDA含量(P<0.05)。(2)与菟丝子组相比,酒炙菟丝子显著提高21日龄肉仔鸡胸腺指数(P<0.05)。说明菟丝子能增强肉仔鸡的免疫力和抗氧化能力,酒炙菟丝子作用效果更好。  相似文献   

10.
共轭亚油酸对鸭肉营养组成及品质影响的研究   总被引：1，自引：0，他引：1  
本试验通过对肉鸭饲喂不同梯度的共轭亚油酸(CLA)日粮来探讨其对肉鸭营养再分配和肉品质的影响.选用1日龄健康、体重相近的樱桃谷鸭240只(P＞0.05),按单因素完全随机设计分为4个处理组(1个对照组,3个试验组),每个处理组设6个重复,每个重复10只鸭.CLA在基础日粮中的比例分别为0%、1%、2%和3%.试验全期共56d,在42日龄和56日龄进行屠宰,测定相关指标.结果表明(1)CLA日粮能显著或极显著降低腹脂率和皮脂率(P＜0.05或P＜0.01),显著增加了6周末的胸肌率(P＜0.05);显著增加了胸肌内脂肪含量及脂肪酸中饱和脂肪酸含量(P＜0.05),显著降低了不饱和脂肪酸的含量(P＜0.05).(2)CLA日粮能显著增加6周末胸肌的硬度(P＜0.05),但对胸肌系水力无显著影响(P＞0.05).  相似文献   

11.
试验采用2×2因子设计(日粮类型0%或1%CLA,肉鸡性别)研究日粮CLA对不同性别肉仔鸡生长性能、屠体性状和脂肪代谢相关酶的影响。结果表明:日粮中添加1%CLA可以显著增加各性别肉仔鸡各阶段的体增重,并改善了4～6、0～6周的饲料转化效率(P<0.05),可以显著提高各性别肉仔鸡的胸肌率、同时显著降低各性别肉仔鸡的腹脂率(P<0.05),显著降低了各性别肉仔鸡腹脂脂蛋白脂酶(LPL)活性及其mRNA相对表达量(P<0.05),显著降低了各性别肉仔鸡腹脂及肝脏硬脂酰辅酶A去饱和酶(SCD)mRNA相对表达量(P<0.05)。另外除体增重部分指标外,性别和日粮CLA对肉仔鸡屠体性状和脂肪代谢相关酶的影响不存在互作关系。  相似文献   

12.
1. The effects of dietary conjugated linoleic acid isomers (CLAs) on productive traits, carcase yield and meat quality were investigated in Beijingyou (Chinese) chickens. A total of 360 male chicks were allocated to 5 dietary treatments (0.00, 0.25, 0.50, 1.00 and 2.00% CLA) and fed for 126 d. 2. The results showed that CLA supplementation did not significantly influence body weight, but increased feed conversion and decreased intramuscular fat in breast and thigh muscles. Mortality was significantly higher in the control group. 3. The addition of 1.0 and 2.0% CLA decreased abdominal fat percentages. At CLA dietary levels greater than 0.5%, lipoprotein lipase activity in plasma was significantly decreased. 4. Hunter L* and a* values were not significantly affected by CLA supplementation. However, Hunter b* values were lower in chickens supplemented at levels greater than 0.5% CLA. Supplementing diets with CLA modified the fatty acid composition of breast muscle. The proportions of CLA, saturated and polyunsaturated fatty acids were increased whereas the proportion of monounsaturated fatty acids was decreased.  相似文献   

13.
选用1日龄北京油鸡公雏360只,随机分成5个处理,每个处理6个重复,每个重复12只鸡,饲喂玉米豆粕型饲料基础日粮,添加0、0.25%、0.5%、1%、2%共轭亚油酸(CLA),用以研究CLA对北京油鸡脂类代谢和肉质性状的长期影响,试验期18周。结果表明:饲粮CLA提高了饲料利用率(P<0.05),显著性地降低了北京油鸡腹脂率和血清中脂蛋白脂酶(LPL)、leptin,显著增加了肌内脂肪的含量(P<0.05),但对pH值和肉色无显著性影响(P>0.05)。  相似文献   

14.
An experiment was undertaken to determine if dietary conjugated linoleic acid (CLA) influences the early stage of the inflammatory response caused by a single injection of Salmonella enteritidisi lipopolysaccharide (LPS) in male broiler chicks. Chicks (7 days old) were fed either 0 or 10 g CLA/kg in their diet for 21 days. At 28 days old, birds were injected intraperitoneally with 1.5 mg LPS/kg body weight after 12 h fasting. Changes in feed intake, rectal temperature and plasma α‐1 acid glycoprotein and ceruloplasmin concentrations were measured during 24 h after LPS injection. Chicks fed the CLA diet were fed more feed for 24 h, had a lower rectal temperature at 9 and 24 h and a lower plasma α‐1 acid glycoprotein concentration at 24 h after LPS injection than chicks fed the basal diet. Plasma ceruloplasmin concentration tended to be lower in chicks fed the CLA diet than in chicks fed the basal diet. The results suggest that dietary CLA alleviate undesirable early inflammatory response due to LPS injection in male broiler chicks.  相似文献   

15.
This study described the relation between the type and amount of dietary fat on the deposition of abdominal fat by broiler chickens. It was hypothesized that at higher fat intakes, the well-known lowering effect of polyunsaturated fatty acids on the deposition of abdominal fat would be diminished. Experimental diets were formulated to contain three levels of added fat (3%, 6% and 9%). Each level had different proportions of the saturated fatty acids (SFA) and unsaturated fatty acids (UFA) by installing the ratios of 1:1, 1:2, 1:3, 1:4 and 1:5 with the use of tallow and soybean oil. Arbor Acres chicks, aged 7 days, were fed one of the 15 experimental diets until they were aged 42 days. Feed and water were provided ad libitum. There was no systematic effect of the dietary fat type and the amount on the weight gain and the feed intake. The lowest SFA:UFA ratio of 1:5 produced the lowest feed conversion rates, irrespective of the amount of the fat in the diet. The abdominal fat deposition was similar in the birds fed on diets containing either 3% or 6% added fat, but deposition was lower than in those fed 9% fat. A decrease in the SFA:UFA ratio of the diet was associated with a dose-dependent decrease in abdominal fat, irrespective of the amount of fat in the diet. This observation leads to the rejection of the hypothesis stated above. A decrease in the dietary SFA:UFA from 1:1 to 1:4 caused a decrease in the number of the fat cells per surface unit of breast meat. It is concluded that an increased intake of soybean oil at the expense of tallow reduced the abdominal fat deposition and the number of fat cells in the breast meat of broiler chickens.  相似文献   

16.
Lu L  Luo XG  Ji C  Liu B  Yu SX 《Journal of animal science》2007,85(3):812-822
An experiment was conducted using a total of 336 one-day-old, Arbor Acres commercial male broilers to investigate the effect of dietary Mn supplementation on carcass traits, meat quality, lipid oxidation, relative enzyme activities in abdominal fat and meat, and Mn-containing superoxide dismutase (MnSOD) mRNA level in meat. Broilers were randomly allotted by BW to 1 of 8 replicate cages (6 chicks per cage) for each of 7 treatments in a completely randomized design involving a 2 x 3 factorial + 1 arrangement of treatments. Dietary treatments included the corn-soybean meal-based diet (control) and the basal diet supplemented with 100 or 200 mg of Mn/kg as MnSO(4) x H(2)O, Mn AA A with a chelation strength of 26.3 formation quotient (8.34% Mn), or Mn AA B with a chelation strength of 45.3 formation quotient (6.48% Mn). Birds fed supplemental Mn had lower (P < 0.10) percentages of abdominal fat, lipoprotein lipase (LPL), and malate dehydrogenase activities and greater (P < 0.07) hormone-sensitive lipase activities in abdominal fat than birds fed a control diet. Birds fed supplemental Mn from Mn AA A or Mn AA B had lower (P < 0.05) LPL activities in abdominal fat than those fed supplemental MnSO(4) x H(2)O. Birds fed supplemental Mn had lower (P < 0.03) malondialdehyde content in leg muscle and greater (P < 0.02) MnSOD activities and MnSOD mRNA level in breast or leg muscle than those fed the control diet. Birds fed supplemental Mn from Mn AA A had a greater (P < 0.02) MnSOD mRNA level in leg muscle than those fed supplemental MnSO(4) x H(2)O. Results from this study indicated that organic Mn was more available than inorganic Mn for decreasing LPL activity in abdominal fat of broilers, and dietary Mn might reduce abdominal adipose deposition by decreasing LPL and malate dehydrogenase activities or increasing hormone-sensitive lipase activity in abdominal adipose tissue. The results also indicated that dietary Mn upregulated muscle MnSOD gene expression pretranslationally in association with increased MnSOD activity, which might explain the decrease of malondialdehyde content in leg muscle.  相似文献   

17.
本文旨在研究母体日粮低能量对后代肉仔鸡生长性能、胴体品质及肉质的影响.试验选用低脂系肉种鸡120羽,随机分成2组,每组60个重复,每个重复1羽,即单笼饲养.在肉种鸡产蛋期产蛋率达到5%进行试验处理,试验分试验组和对照组,试验组代谢能量为对照组的80%孵化后的肉仔鸡按照母体不同能量处理各挑选健康仔鸡,在相同的试验条件下进行饲养,试验期为56 d.结果表明:1)与对照组相比,母体日粮低能量有降低1日龄肉仔鸡体重的趋势,对全期日增重和料重比影响不显著(P＞0.05);2)与对照组相比,母体日粮低能量对后代肉仔鸡胸肌和腿肌的水分、脂肪和蛋白质含量,胸肌率和腹脂率均无显著影响(P＞0.05),但显著增加腿肌率(P＜0.05);3)与对照组相比,母体日粮低能量对后代肉仔鸡胸肌和腿肌的pH、红度、黄度、滴水损失和蒸煮损失均无显著影响(P＞0.05),但pH、红度和黄度值有升高趋势,滴水损失和蒸煮损失有降低趋势,胸肌和腿肌剪切力显著降低(P＜0.05);4)与对照组相比,母体日粮低能量显著提高后代肉仔鸡胸肌和腿肌肌纤维密度(P＜0.05),显著降低后代肉仔鸡胸肌和腿肌肌纤维直径(P＜0.05).本试验的研究结果表明:母体日粮低能量对后代肉仔鸡的胴体品质及肉质能产生一定的影响.  相似文献   

18.
Two experiments were conducted with Ross × Ross broiler chicks in battery brooders from 7 to 21 d of age to determine the Arg and Met requirements of young broiler chicks at control (25°C) and warm (35°C) temperatures. In both experiments, 1-d-old broiler chicks were fed a corn and soybean meal based starter diet for 7 d. Six replications (2 replicates in each of 3 rooms per temperature) with 8 chicks each were used for each treatment. In experiment 1, the basal diet was based on corn (34.52%), whey (26.96%), corn gluten meal (16.53%), soybean meal (11.74%), and poultry fat (23% of CP and 3.20 kcal/g of MEn). Six levels of Arg (0, 0.1, 0.2, 0.3, 0.4, and 0.5%), supplementing the basal diet containing 0.95% Arg, were the dietary treatments. A broken-line linear model was used to estimate chick Arg requirements. Based on body gain and feed conversion ratio (FCR) data, respectively, the Arg requirements of young Ross × Ross broiler chicks raised at 35°C were 1.15 ± 0.03% and 1.13 ± 0.02%, whereas those of chicks at 25°C were 1.26 ± 0.03% and 1.27 ± 0.02%. In experiment 2, the influences of temperature and dietary Arg on the Met requirements of young broiler chicks were investigated. The basal diet was based on corn (53.45%), soybean meal (37.72%), and poultry fat (23% of CP and 3.20 kcal/g of ME). Experiment 2 had a 6 × 2 factorial arrangement, with the basal diet (0.35% Met and 1.52% Arg) supplemented with 6 levels of dietary Met (0, 0.05, 0.1, 0.15, 0.2, or 0.3%) and 2 levels of dietary Arg (0 and 1.0%). When chicks were fed a corn-soybean meal basal diet containing 1.52% Arg, the Met requirements of young Ross × Ross broiler chicks raised at 35°C were 0.43 ± 0.02% and 0.43 ± 0.03%, whereas those of chicks at 25°C was 0.43 ± 0.01% and 0.48 ± 0.03%, based on body gain and FCR data, respectively. When Arg levels were increased to 2.52%, the Met requirement of young Ross × Ross broiler chicks was greater at both temperatures (P < 0.05). The requirements of chicks raised at 35°C were 0.50 ± 0.02% and 0.49 ± 0.02% and at 25°C were 0.59 ± 0.03% and 0.57 ± 0.02%, based on body gain and FCR data, respectively. Temperature and amino acid balance may both affect the amino acid requirements of broilers.  相似文献   

19.
1. The influence of dietary conjugated linoleic acid (CLA) on the antioxidant status in the absence or presence of endotoxin exposure was studied with male broiler chicks. 2. In experiment 1, a total of 240 1-d-old broilers were allotted into 4 dietary groups (0, 2.5, 5.0 or 10.0 g pure CLA/kg) to study the influence of CLA on growth performance and antioxidant defence systems. The results showed that growth performance was not altered by 42 d of CLA consumption. Increased total superoxide dismutase (TSOD) activities in liver, serum and muscle were observed in chicks given 10.0 g CLA/kg diet. Dietary CLA at 10.0 g/kg also markedly elevated liver catalase (CAT) activity. Malondialdehyde (MDA), a marker of lipid peroxidation, decreased in liver, serum and muscle in chicks given 5.0 and 10.0 g CLA/kg diet. 3. In experiment 2, a total of 120 1-d-old broilers were fed on a control diet (without CLA) or 10.0 g CLA/kg diet. Half of the birds fed on each diet were injected intraperitoneally with 0.25 mg/kg body weight of Salmonella enteritidis lipopolysaccharide (LPS) at 16, 18 and 20 d of age. Decreased glutathione peroxidase (GSH-Px), TSOD activity and increased ceruloplasmin and MDA concentrations were seen in the challenged chicks. Dietary CLA prevented the loss of body weight gain and feed conversion ratio of chicks followed repeated endotoxin exposure. CLA partially inhibited the increase of serum ceruloplasmin and MDA at 17 and 21 d of age and notably suppressed the decrease of serum TSOD activity at 21 d of age. 4. These results suggested that dietary CLA enhances the activity of antioxidant enzymes including TSOD and CAT. Supplementation of CLA has been shown to ameliorate the antioxidant balance and performance of chicks during oxidative stress.  相似文献   

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