CAJ | 학술논문

试验旨在研究日粮阴阳离子平衡对泌乳中后期热应激奶牛血液生化指标的影响,选取试验奶牛32头分为4组,每组8头,日粮DCAB分别为对照组83 mEq/kgDM、试验Ⅰ组172 mEq/kgDM、试验Ⅱ组217 mEq/kgDM、试验Ⅲ组357 mEq/kgDM.研究结果表明:DCAB增加可在一定程度上提高奶牛血液的缓冲能力,缓解奶牛热应激,随DCAB增加,血液的pH值及HCO3-浓度升高,CO2分压下降,差异均不显著(P>0.05);高的DCAB能增加血液Na+、K+浓度,K+显著增加,Cl-显著下降(P<0.05);高水平的DCAB日粮,能使泌乳中后期血液ALP含量增加, CK、ALT含量减少,差异不显著(P>0.05).综合DCAB对血液缓冲能力、血液生化指标等方面考虑,在泌乳中后期DCAB为217 mEq/kgDM时饲喂效果较好.
시험지재연구일량음양리자평형대비유중후기열응격내우혈액생화지표적영향,선취시험내우32두분위4조,매조8두,일량DCAB분별위대조조83 mEq/kgDM、시험Ⅰ조172 mEq/kgDM、시험Ⅱ조217 mEq/kgDM、시험Ⅲ조357 mEq/kgDM.연구결과표명:DCAB증가가재일정정도상제고내우혈액적완충능력,완해내우열응격,수DCAB증가,혈액적pH치급HCO3-농도승고,CO2분압하강,차이균불현저(P>0.05);고적DCAB능증가혈액Na+、K+농도,K+현저증가,Cl-현저하강(P<0.05);고수평적DCAB일량,능사비유중후기혈액ALP함량증가, CK、ALT함량감소,차이불현저(P>0.05).종합DCAB대혈액완충능력、혈액생화지표등방면고필,재비유중후기DCAB위217 mEq/kgDM시사위효과교호.
The experiment was conducted to study the effects of DCAB on blood biochemical pa?rameters of mid-late lactation heat stressed dairy cows. 32 cows were selected respectively, and were randomly assigned into 4 groups, and four levels of DCAB were as follows: control group was 83 mEq/kgDM, groupⅠwas 172 mEq/kgDM, groupⅡ was 217 mEq/kgDM, group Ⅲ was 357 mEq/kgDM diet. The results showed as follows: abilities of blood buffer of dairy cows were increased with DCAB increasing,blood pH and HCO3-concentration increased,CO2 partial pres?sure decreased, but there were no significant differences(P>0.05); high DCAB can increase the blood Na+, K+ concentration, K+ was significantly increased, Cl- was significantly decreased(P<0.05); a high level of DCAB diet could increase blood ALP content, decrease CK,ALT levels, the differences were not significant(P>0.05). Considering of the results above, a better effect of dairy cows was observed in groupⅡwith DCAB of 217 mEq/kgDM.