摘要
选择96头体质量约65 kg的杜长大三元杂交猪,研究不同三价铬源对肥育猪胴体组成和脂肪代谢的影响。试验猪分成4组,每组3个重复。1组为对照组,饲喂基础饲粮,其余3组为试验组,分别饲喂基础饲粮添加来源于氯化铬、吡啶羧酸铬、纳米铬的含200μg.kg-1铬试验饲粮,试验期40 d。结果表明,与对照组相比,纳米铬提高了猪日增质量和饲料转化效率(P<0.05);增加了胴体瘦肉率和眼肌面积(P<0.05),降低了脂肪率和背膘厚(P<0.05)。吡啶羧酸铬对胴体脂肪率和眼肌面积也有显著影响(P<0.05)。纳米铬和吡啶羧酸铬提高了皮下脂肪组织激素敏感脂酶活性、血清总蛋白和游离脂肪酸水平(P<0.05),降低了血清葡萄糖和胰岛素水平(P<0.05)。纳米铬还降低了尿素氮、甘油三酯和胆固醇含量(P<0.05),提高了血清高密度脂蛋白、胰岛素样生长因子I水平及脂肪酶活性(P<0.05)。结果提示,三价纳米铬对猪生长和胴体组成的效果优于常规铬源,对机体脂肪代谢有明显的调控作用。
96 pigs with an initial average body weight 65 kg were used to study the effects of trivalent chromium from different source on carcass composition and lipid metabolism. The pigs were assigned into four treatments with three replicates each, and were feed with four kinds of diets including a control diet and the control diet supplemented with 200 μg · kg^-1 chromium from either chromium chloride（CrCl3）, chromium picolinate（CrPic）and chromium nanocomposite （CrNano） for 40 days. The results showed that, compared with control group, supplemental CrNano improved average daily gain and feed conversion rate（P〈0.05）, increased carcass lean percentage and loin eye area （P〈0.05）, and decreased carcass fat percentage and backfat thickness （P〈 0.05）. CrPic supplementation also had significant effect on carcass fat percentage and loin eye area （P〈0.05）. Hormone sensitive lipase in subcutaneous fat, total protein and free fat acid in serum was increased with the supplementation of Cr from either CrNano or CrPic（P〈0.05）. The supplementation of Cr from CrNano or CrPic decreased serum glucose and insulin level （P〈0.05）. Urea nitrogen, serum triglyceride and cholesterol were decreased（P〈0.05）, and serum high density lipoprotein, insulin like growth factor Ⅰ and lipase activity were increased with the supplementation of CrNano（P〈0. 05）. These results indicated that chromium nanocomposite exhibited more effects on growth and carcass composition of pigs than traditional chromium sources, and it could stimulate lipid catabolism and modulate lipid metabolism.
出处
《畜牧兽医学报》
CAS
CSCD
北大核心
2009年第1期59-65,共7页
ACTA VETERINARIA ET ZOOTECHNICA SINICA
基金
国家自然科学基金项目(30400317)
关键词
铬
猪
胴体组成
脂质代谢
chromium
pig
carcass composition
lipid metabolism
