饲料中添加N-羟甲基蛋氨酸钙对泌乳期奶牛血清生化指标的影响

发布时间：2018-06-14 23:22

本文选题：荷斯坦奶牛 + N-HMM-Ca　；参考：《中国农业大学学报》2017年03期

【摘要】：为研究饲料中添加不同比例N-HMM-Ca对泌乳期奶牛血清生化指标的影响,试验选用胎次、产奶量和泌乳天数相近身体健康的荷斯坦奶牛30头,完全随机区组分为5组,每组6头。对照组饲喂基础日粮;试验组分别饲喂在基础日粮中以干物质基础添加0.15%、0.30%、0.75%和1.50%的N-HMM-Ca,预试期14d,正试期42d。结果表明:1)泌乳期奶牛日粮中添加0.75%N-HMM-Ca使血清中谷丙转氨酶(ALT)和谷草转氨酶(AST)浓度显著升高。2)在第14天时,1.50%组甘油三酯(TG)浓度显著高于其他各处理组(P0.01)。血清中高密度脂蛋白(HDL)水平有所提高,但差异不显著(P0.05);随着N-HMM-Ca添加量的增加血清中非酯化脂肪酸(NEFA)的浓度逐渐降低(P0.05);对β-羟丁酸(β-OHB)来说,随着日粮中N-HMM-Ca添加量的增加浓度逐渐升高(P0.05)。3)0.15%、0.30%和0.75%组血清IgA浓度呈现增加的趋势,而且在第42天时尤为显著(P0.01)。4)在第28天时,泌乳期奶牛日粮中分别添加0.15%和0.30%的N-HMM-Ca使过氧化氢酶(CAT)浓度显著高于其他各处理组(P0.01)。综上所述,泌乳期奶牛日粮中添加0.15%的N-HMM-Ca有利于改善机体健康。
[Abstract]:In order to study the effect of different proportion of N-HMM-Ca on serum biochemical indexes of lactating dairy cows, 30 Holstein cows with similar birth number, milk yield and lactation days were randomly divided into 5 groups, 6 in each group. The control group was fed with basal diet, and the experimental group was fed with 0.15% N-HMM-Ca0.30% and 1.50% N-HMM-Ca0.30% in the basal diet for 14 days and 42 days respectively. The results showed that addition of 0.75N-HMM-Ca to the diets of lactating dairy cows significantly increased the serum alt and AST concentrations at the 14th day.) the concentration of TGG in the 1.50% group was significantly higher than that in the other treatments (P0.01). The level of HDL in serum increased, but the difference was not significant (P 0.05). With the increase of N-HMM-Ca addition, the concentration of non-esterified fatty acid (NEFAA) in serum decreased gradually, and the concentration of 尾 -hydroxybutyric acid (尾 -OHBs) decreased gradually. With the increase of N-HMM-Ca supplementation in diet, the serum IgA concentration increased gradually in the groups of 0.30% and 0.75% of P0.05 and 0.75%, and was especially significant on the 42nd day (P0.01C. 4) on the 28th day. Adding 0.15% and 0.30% N-HMM-Ca to the diets of lactating dairy cows significantly increased the concentration of catalase CATs compared with other treatments (P 0.01). In conclusion, 0.15% N-HMM-Ca supplementation was beneficial to the improvement of body health in lactating dairy cows.
【作者单位】：扬州大学动物科学与技术学院;
【基金】：江苏省高校优势学科建设工程项目(PAPD) 上海市科学技术委员会国内科技合作项目(14395810100)
【分类号】：S823.5

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