活性酵母添加物对泌乳奶牛瘤胃发酵与生产性能影响的研究

发布时间：2018-02-26 23:10

本文关键词： 活性酵母荷斯坦奶牛生产性能瘤胃发酵血液指标　出处：《新疆农业大学》2015年硕士论文　论文类型：学位论文

【摘要】：本研究的目的旨在研究高产荷斯坦奶牛日粮中添加活性酵母(P8)对泌乳奶牛的生产性能、瘤胃发酵指标、血液指标等参数的影响。试验选取年龄、胎次、产奶量相近的健康荷斯坦新产母牛60头,分成2个组,每组30头牛,进行为期60d的饲养试验。试验分为对照组和试验组,试验结果如下：1.日粮中添加活性酵母(P8)对泌乳奶牛瘤胃发酵指标的影响：结果表明,试验全期两个组的pH在6.47～6.49之间,对照组和试验组无显著差异(P0.05),同时两组间氨态氮(NH3-N)、丙酸(Propionate)、丁酸(Butyrate)、乙/丙比(Acetate:Propionate ratio)参数均无显著性差异；但试验组瘤胃液中乙酸(Acetate)、总酸(total VFA)浓度显著高于对照组(P0.05)。2.日粮中添加活性酵母(P8)对泌乳奶牛血液指标的影响：结果表明,试验组血清p-羟丁酸(BHBA)和总蛋白(TP)相对于对照组有升高趋势,但无显著性差异(P0.05),但试验组血液中甘油三酯(TG)的含量极显著高于对照组(P0.01),其中试验全期,各组间的非酯化脂肪酸(NEFA)、总胆固醇(TC)、血糖(Glu)、胰岛素(Ins)、低密度脂蛋白(LDL)、烟酸(Niacin)、尿素氮(BUN)、类胰岛素生长因子-I(IGF-1)均无显著差异(P0.05)。3.日粮中添加活性酵母(P8)对泌乳奶牛生产性能的影响：结果表明,试验组相对于对照组干物质采食量(DMI)和产奶量有一定的提高,但差异不显著(P0.05),同时活性酵母对两组乳蛋白(Protein)、乳固形物含量(SNF)和尿素氮(MUN)均无显著差异(P0.05);试验组乳脂率(Fat)显著高于对照组乳脂率(P0.05),对试验组体细胞数(SCC)有一定的降低作用,但无差异不显著(P0.05)。
[Abstract]:The purpose of this study was to study the effects of adding active yeast P8 into the diet of high-yield Holstein cows on the production performance, rumen fermentation index and blood index of lactating cows. Sixty new Holstein cows with similar milk yield were divided into two groups, 30 cows in each group, and were fed for 60 days. The experiment was divided into two groups: control group and experimental group. The results were as follows: 1. The effect of adding active yeast P8 into the diet on rumen fermentation index of lactating cows: the results showed that the pH of the two groups was between 6.47 and 6.49 during the whole trial period. There was no significant difference between the control group and the experimental group (P 0.05), and there was no significant difference in the parameters of NH _ 3-N _ 3, Propionate, Butyratea and Acetate: propionate between the two groups. But the concentration of Acetate acetate and total acid total VFAin in rumen fluid of the trial group was significantly higher than that of the control group (P0.050.2. the effect of adding active yeast P8) to the blood index of lactating cows: the results showed that the concentration of Acetate acetate and total acid in the rumen fluid of the trial group was significantly higher than that in the control group. Compared with the control group, the serum pHBA and TP of the test group showed an increasing trend, but there was no significant difference (P 0.05), but the content of triglyceride TGin in the blood of the test group was significantly higher than that of the control group (P 0.01), and during the whole period of the experiment, there was no significant difference between the two groups, and the content of triglyceride in the blood of the test group was significantly higher than that of the control group (P 0.01). There was no significant difference in nonesterified fatty acid (NEFAA), total cholesterol (TCN), glucose gluten (GluA), insulin (Insl), low density lipoprotein (LDLN), niacinn (Niacinn), bun (bun), insulin-like growth factor (IGF-1) between the three groups (P 0.055.3.The dietary supplement of active yeast P8) was of no significance in the production of lactating cows. Effect of performance: the results show that, Compared with the control group, the dry matter intake (DMI) and milk yield of the test group were improved to a certain extent. But the difference was not significant (P0.05), and the active yeast had no significant difference on the milk protein, milk solids content (SNFs) and urea nitrogen (Mun), the milk fat rate in the test group was significantly higher than that in the control group (P 0.05), and it had a certain effect on the number of SCCs in the test group. But the difference was not significant (P 0.05).
【学位授予单位】：新疆农业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S823.5

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