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烟酰胺对热应激奶牛血液中代谢产物的影响
孙先枝,郑楠,卜登攀,潘龙,秦俊杰,王秀敏,张幸开,袁耀明,程建波
0
(安徽农业大学动物科技学院,合肥230036; 中国农业科学院北京畜牧兽医研究所,农业部奶产品质量安全风险评估实验室(北京),北京 100193;中国农业科学院北京畜牧兽医研究所,动物营养学国家重点实验室,北京 100193;北京市中兽药工程技术研究中心,北京 102206;上海光明荷斯坦牧业有限公司,上海 200443)
摘要:
本试验旨在研究烟酰胺对热应激奶牛血液中能量、脂类、蛋白质代谢产物以及血清中无机盐离子浓度的影响。试验选用20头健康的泌乳早期荷斯坦奶牛,随机分为对照组和烟酰胺处理组;对照组饲喂基础日粮,烟酰胺处理组饲喂基础日粮加8 g·d-1烟酰胺;预试期1周,正式期9周。结果表明:(1)添加烟酰胺显著降低(P < 0.05)热应激奶牛血液中非酯化脂肪酸、甘油三脂、总胆固醇和低密度脂蛋白胆固醇浓度,并有降低β-羟丁酸的趋势(P = 0.1),但是对血清中葡萄糖、总蛋白、白蛋白以及尿素氮含量无显著影响(P > 0.05);(2)日粮中添加烟酰胺显著提高了热应激奶牛血清中钠离子和氯离子浓度(P < 0.05),有提高血清中钙离子浓度的趋势(P = 0.10),但不影响钾、镁和磷离子含量(P > 0.05)。因此,补饲8 g·d-1烟酰胺,有助于改善热应激奶牛的脂类代谢,维持机体电解质平衡。
关键词:  烟酰胺  热应激  奶牛  代谢产物
DOI:10.13610/j.cnki.1672-352x.20150302.020
基金项目:中国农科院科技创新工程项目(ASTIP-IAS12), 安徽省教育厅自然科学基金(KJ2013A115)和高校博士点基金项目(20133418120002)共同资助。
Effects of nicotinamide on blood metabolites of cows under heat stress
SUN Xianzhi,ZHENG Nan,BU Dengpan,PAN Long,QIN Junjie,WANG Xiumin,ZHANG Xingkai,YUAN Yaoming,CHENG Jianbo
(School of Animal Science and Technology, Anhui Agricultural University, Hefei 230036; Ministry of Agriculture-Milk Risk Assessment Laboratory, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193;State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193;Beijing Engineering Research Center for Veterinary Drugs, Beijing 102206;Shanghai Bright Holstan Co., Ltd., Shanghai 200443)
Abstract:
The experiment was conducted to determine the effects of nicotinamide on the metabolism of carbohydrate, lipid, protein, and the ion chroma in serum of Chinese Holstein cows under the heat stress condition. Twenty healthy early lactation Holstein cows were randomly assigned to the control and nicotinamide supplementation group for a 10-week experimental period. Cows were fed with basic diet or basic diet plus 8 g·d-1 nicotinamide in the control or nicotinamide group, respectively. The results were as follows. (1) The concentrations of nonestesterified fatty acid, total triglyceride, total cholesterol, and low density lipoprotein cholesterol significantly decreased in the nicotinamide supplementation group (P<0.05) and the level of β-hydroxybutyricacid also showed the decreasing trend (P = 0.1); however, supplemented with nicotinamide had no significant effect on the levels of serum glucose, total protein, albumin, and urea nitrogen; (2) Compared to the control group, the levels of sodion, calcium, and chloridion ion in serum significantly increased by nicotinamide supplementation, but no significant difference in the levels of kalium, magnesium, and phosphonium between the two groups was observed (P<0.05); therefore, nicotinamide supplementation at 8 g·d-1 showed the best effect on improving the lipid metabolism and
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