| 摘要: |
| 【目的】探究基础日粮中添加不同剂量姜黄对白羽肉鸡生长性能和肝脏抗氧化能力的影响，为姜黄在白羽肉鸡饲养中的合理使用提供参考。【方法】选取288只体质量相近的健康雄性1日龄白羽肉鸡，随机分为对照组和低、中、高剂量组，每组6个重复，每个重复12只鸡；对照组饲喂基础日粮，低、中、高剂量组分别饲喂含有5，10，15 g/kg姜黄的基础日粮。试验期共42 d，分别在肉鸡21日龄、42日龄称质量和屠宰采样，测定各组肉鸡生长性能、屠宰性能、血清生化指标、肝脏指数、肝脏抗氧化指标及抗氧化相关基因的表达。【结果】①与对照组相比，1~21日龄时，低、中、高各剂量组肉鸡的平均日增重显著升高（P<0.05），平均日采食量无显著差异（P>0.05），仅低剂量组的料重比显著降低（P<0.05）；22~42日龄时，仅低剂量组肉鸡的平均日增重显著升高（P<0.05），且料重比显著降低（P<0.05）。②与对照组相比，低、中、高各剂量组肉鸡的全净膛率、半净膛率、腿肌率和腹脂率均无显著变化（P>0.05），仅低、中剂量组肉鸡的胸肌率显著升高（P<0.05）。③与对照组相比，只有低剂量组肉鸡血清中的高密度脂蛋白胆固醇（HDL-C）水平在42日龄时显著升高（P<0.05），其余各组肉鸡血清中的甘油三酯（TG）、胆固醇（TC）、低密度脂蛋白胆固醇（LDL-C）和HDL-C水平在21日龄和42日龄时均无显著变化（P>0.05）。④与对照组相比，基础日粮中添加不同剂量姜黄对肉鸡肝脏指数无显著影响（P>0.05）。⑤与对照组相比，21日龄时，各组肉鸡肝脏超氧化物歧化酶（SOD）、谷胱甘肽过氧化物酶（GSH-Px）活性以及丙二醛（MDA）含量均无显著差异（P>0.05）；42日龄时，低、中、高各剂量组SOD、GSH-Px活性较对照组均显著升高（P<0.05），MDA含量仅低剂量组显著降低（P<0.05）。⑥与对照组相比，21日龄时，低、中剂量组肉鸡肝脏中Nrf2、HO-1 mRNA的表达显著升高（P<0.05），高剂量组仅Nrf2的表达显著升高（P<0.05）；42日龄时，低剂量组肉鸡肝脏中Nrf2、HO-1 mRNA的表达显著升高（P<0.05），中、高剂量组仅HO-1的表达显著升高（P<0.05）。【结论】本试验条件下，基础日粮中添加5 g/kg姜黄能显著提高白羽肉鸡的生长性能，提高肝脏抗氧化能力。 |
| 关键词: 姜黄 白羽肉鸡 生长性能 血清生化指标 肝脏抗氧化能力 |
| DOI： |
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| 基金项目:福建省科技厅重大专项专题项目（2021NZ029008）；福建省自然科学基金项目（2021J01080）；福建省中青年教师教育科研项目（JAT200108）；福建丰沃科技有限公司横向课题项目“姜黄在蛋鸡生产上的应用研究”（KH190363A） |
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| Effects of turmeric supplementation on growth performance and liver antioxidant capacity of white-fathered broilers |
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PAN Liqin,XIAO Shixin,LU Chunting,et al
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| Abstract: |
| 【Objective】This study investigated the effects of different levels of turmeric supplementation on growth performance and liver antioxidant capacity of broilers to provide reference for application of turmeric in white-feathered broilers.【Method】A total of 288 white-feathered broilers were randomly divided into 4 groups with 6 replicates per group and 12 broilers per replicate.For a period of 42 days,the control group was fed a basal diet,and the low,medium and high dose groups were fed a basal diet containing 5,10 and 15 g/kg turmeric,respectively.The growth performance,slaughter performance,serum biochemical indexes,liver index,liver antioxidant indexes and expression of antioxidant-related genes of broilers in each group were measured at 21 and 42 days of age,respectively.【Result】① Compared with the control group,the average daily gain of broilers in each group was significantly increased at the age of 21 days (P<0.05),the average daily feed intake of broilers was insignificantly different (P>0.05),while the ratio of feed to gain of broilers was significantly decreased only in the low dose group (P<0.05).At the age of 42 days,the average daily gain and ratio of feed to gain of broilers were significantly increased in the low dose group (P<0.05).② Compared with the control group,the eviscerated percentage,semi-eviscerated percentage,leg muscle percentage and abdominal fat percentage of broilers in all groups had no significant changes (P>0.05),while the breast muscle percentage of broilers was significantly increased in low and medium dose groups (P<0.05).③ Compared with the control group,the serum HDL-C increased significantly in the low dose group at the age of 42 days (P<0.05),while the serum TG,TC,LDL-C and HDL-C levels in other groups had no significant changes at the age of 21 and 42 days (P>0.05).④ Compared with the control group,adding different doses of turmeric in the basal diet had no significant effect on liver index of broilers (P>0.05).⑤ Compared with the control group,there were no significant differences in SOD,GSH-Px and MDA contents in liver of broilers at the age of 21 days (P>0.05).At the age of 42 days,the contents of SOD and GSH-Px in each group were significantly higher than those in the control group (P>0.05),while the content of MDA was significantly decreased only in the low-dose group (P<0.05).⑥ Compared with the control group,the mRNA expressions of Nrf2 and HO-1 in liver of broilers were significantly increased in low and medium dose groups (P<0.05) at the age of 21 days,while Nrf2 expression was significantly increased only in high dose group (P<0.05).At the age of 42 days,the mRNA expressions of Nrf2 and HO-1 in liver of broilers were significantly increased in low dose group (P<0.05),while HO-1 expression was significantly increased in medium and high dose groups (P<0.05).【Conclusion】Basal diet supplemented with 5 g/kg turmeric could significantly improve growth performance and antioxidant capacity of liver in white-feathered broilers under this experimental condition. |
| Key words: turmeric white-feathered broiler growth performance serum biochemical index antioxidant capacity of liver |
