| 不同热应激条件下添加二氢吡啶对奶牛瘤胃发酵功能的影响 |
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| 引用本文： | 赵新茂,隋晨,王肆玖,金尔光,才航,易建明.不同热应激条件下添加二氢吡啶对奶牛瘤胃发酵功能的影响[J].中国牛业科学,2012,38(3):27-32. |
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| 作者姓名： | 赵新茂 隋晨 王肆玖 金尔光 才航 易建明 |
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| 作者单位： | 1. 华中农业大学动物科技学院,湖北武汉,430070
2. 武汉市畜牧兽医科学研究所,湖北武汉,430065 |
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| 基金项目： | 湖北省研究与开发计划，科技部中英重点国际合作项目 |
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| 摘 要： | 目的]研究不同热应激条件下添加二氢吡啶对奶牛瘤胃发酵功能的影响。方法]试验选取6头三胎次泌乳中期中国荷斯坦奶牛,采用自身前后对照,分为4个时期:无应激且不添加二氢吡啶(NS-ND)、无应激添加二氢吡啶(NS-D)、应激但不添加二氢吡啶(S-ND)、应激且添加二氢吡啶(S-D),二氢吡啶添加量为每头牛3.0g/d(即0.6mg/kg体重)。结果]S-ND时期与NS-ND时期相比,瘤胃液中pH值降低,NH3-N浓度极显著升高(P0.01),瘤胃液内挥发性脂肪酸(VFA)的浓度显著下降(P0.01),其中乙酸的百分比含量下降,丙酸和丁酸的百分比含量升高,但差异不显著(P0.05),乙丙比呈稍下降趋势,差异不显著(P=0.13);应激和无应激时期添加二氢吡啶后,有使瘤胃液pH降低的趋势,NH3-N浓度均显著降低(P0.01),VFA的浓度显著提高(P0.01),乙丙比显著增高(P0.01)。结论]添加二氢吡啶对提高热应激时期奶牛瘤胃的发酵功能有良好效果。
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| 关 键 词： | 二氢吡啶 热应激 奶牛 瘤胃发酵功能 |
Influence of DHP on the Rumen Fermentation of Dairy Cows in Different Heat Stress Levels |
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| ZHAO Xin-mao,SUI Chen,WANG Si-jiu,JIN Er-guang,CAI Hang,YI Jian-ming.Influence of DHP on the Rumen Fermentation of Dairy Cows in Different Heat Stress Levels[J].China Cattle Science,2012,38(3):27-32. |
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| Authors: | ZHAO Xin-mao SUI Chen WANG Si-jiu JIN Er-guang CAI Hang YI Jian-ming |
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| Institution: | 1. College of Animal Science and Technology, Huazhong Agricultural Univeiserty , Wuhan , Hubei 430070 2. Wuhan Institute of Animal Science and Veterinary Medicine ,Wuhan , Hubei 430065) |
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| Abstract: | Objective]This paper was conducted to investigate the effect of dihydropyridine （DHP） on rumen fermentation in different heat stress levels. Method]Six dairy cows in mid lactation were used. There were four periods in this research： unstressed without DHP （NS-ND）, unstressed with DHP （NS- D）, stressed without DHP （S-ND） ,stressed with DHP （S-D）. Cows were fed with DHP for 3.0 g/d per cow. Result]The result showed that there was a decrease tendency of ruminal pH values with the increase of the environmental THI, NH3-N concentration increased significantly （ P 〈0.01）, concentration of total VFA in the rumen reduced （ P 〈0. 01）, the proportion of acetic acid among other VFA also reduced throughout the stress shifts （P 〉0.05）, while propionic and butyric acids, demonstrated an opposite tendency （ P ）0.05）. Accordingly, the ratio of acetic acid to propionic acid decreased with the stress in creasing （P=0.13）. In NS-D and S-D period （ P d0.05）,ruminal pH values reduced,NH3-N concentra tion reduced （ P d0.01） ,concentration of total VFA in the rumen increased （ P 〈0.01） and the ratio of acetic acid to propionic acid tended to increase due to DHP addition （ P 〈0.01） compared with NS-ND and S-ND period. ConclusionlDHP can improve rumen fermentation pattern in heat stress period and its effect is beneficial. |
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| Keywords: | dihydropyridine heat Stress cow rumen fermentation |
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