作　　者： ; ; ; ; ; ; ; (钱汝俊）;

机构地区： 广东海洋大学农学院

出　　处： 《中国兽医学报》 2015年第4期614-619,共6页

摘　　要： 选取240只1日龄健康、体质量接近的罗斯肉仔鸡,随机分为Ⅰ~Ⅴ5个组,每组设4个重复,每个重复12只鸡。试验Ⅰ组为对照组,饲喂基础饲粮,Ⅱ~Ⅴ组为试验组,在基础饲粮中分别添加吡啶羧酸铬0.1、0.2、0.4和0.8mg/kg(以铬计),试验期为42d。结果表明,21日龄各试验组腹脂沉积有降低趋势,试验Ⅳ组降低44.64%(P<0.05),其余各组差异不显著(P>0.05);皮下脂肪厚度分别降低0.49%(P>0.05)、0.99%(P>0.05)、6.40%(P>0.05)和3.45%(P>0.05);肌间脂肪宽度没有规律性变化;试验Ⅱ、Ⅲ和Ⅳ组血清TG分别降低17.14%(P<0.05)、14.29%(P<0.05)和15.71%(P<0.05);试验Ⅴ组血清HDL-C水平升高11.59%(P<0.05);血清TC和TG变化不显著。42日龄试验各组腹脂率分别降低23.90%(P>0.05)、24.88%(P>0.05)、34.15%(P<0.05)和29.76%(P<0.05);试验Ⅳ组皮下脂肪厚度降低11.76%(P>0.05);试验Ⅲ、Ⅳ组血清TC分别降低26.26%(P<0.05)和25.32%(P<0.05),试验Ⅱ和Ⅴ组有降低趋势,但差异不显著(P>0.05);试验Ⅲ和Ⅳ组血清TG分别降低23.26%(P<0.05)和22.48%(P<0.05);吡啶羧酸铬能显著降低血清LDL-C的含量(P<0.05),提高Ⅱ、Ⅳ和Ⅴ组血清HDL-C含量(P>0.05),Ⅲ组提高达18.36%(P<0.05)。因此,吡啶羧酸铬能有效降低罗斯肉鸡腹脂率,显著影响腹脂沉积;降低皮下脂肪厚度;对肌间脂肪宽度没有规律性的影响;对血清TC、TG、LDL-C和HDL-C有显著影响。罗斯肉鸡饲粮中降低腹脂率的吡啶羧酸铬最佳添加量为0.4mg/kg。 Two hundred and fourty one-day-old Ross broilers chicks with approximate weight were selected and divided randomly into 5groups with 4replicates per group and 12 broiler chicks per replicate.The chicks in groupⅠ were fed the basal diet,groupⅡ-Ⅴ were fed the basal diet supplemented with 0.1,0.2,0.4and 0.8mg/kg chromium picolinate(as measurement of the total chromium content),respectively.The experiment lasted for 42 days.The results showed that on day 21,the abdominal fat deposition tended to decrease in groupsⅡ-Ⅴ,and groupⅣ decreased by 44.64%(P<0.05).There was no significant difference among other groups.Subcutaneous fat decreased by0.49%(P>0.05),0.99%(P>0.05),6.40%(P>0.05)and 3.45%(P>0.05),respectively.Intramuscular fat had no regular changes.Serum TG contents in group Ⅱ,Ⅲ and Ⅳ decreased by17.14%(P<0.05),14.29%(P<0.05)and 15.71%(P<0.05),respectively.Serum HDL-C contents in groupⅤ increased significantly by 11.59%(P<0.05).Serum TC and TG contents had no significant differences among other groups.On day 42,the abdominal fat rate of chicks in groupsⅡ-Ⅴ decreased by 23.90%(P>0.05),24.88%(P>0.05),34.15%(P<0.05)and 29.76%(P<0.05),respectively.The subcutaneous fat thickness of group Ⅳdecreased by 11.76%(P<0.05).Serum TC of group Ⅲ and Ⅳ decreased by 26.62%(P<0.05)and 25.32%(P<0.05),respectively.Serum TG of group Ⅲ and Ⅳdecreased by 23.26% and 22.48%(P<0.05),respectively.Chromium picolinate significantly decreased serum LDL-C(P<0.05)and improved the serum HDL-C of group Ⅱ,Ⅳ and Ⅴ(P>0.05),and increased HDL-C of group Ⅲ by 18.36%(P<0.05).It indicated that chromium picolinate can effectively reduce abdominal and subcutaneous fat deposition,change the intramuscular fat irregularly and significantly affect serum TC,TG,LDL-C and HDL-C.The optimum quantity of chromium picolinate is 0.4mg/kg.

关 键 词： 吡啶羧酸铬 罗斯肉鸡 腹脂率 皮下脂肪 肌间脂肪 血清生化指标

领　　域： [农业科学] [农业科学]