麦秸-苜蓿型全混合日粮阴阳离子平衡对绵羊血液生化指标及氮平衡的影响

Influence of Dietary Cation-Antion Balance on Parameters of Plasma and Nitrogen Metabolism of Sheep Fed a Wheat Stover and Alfalfa Based Diet

试验采用3×3拉丁方试验设计,选用6只绵羊,分为3组,通过饲养和消化试验来研究饲喂不同阴阳离子平衡的麦秸全混合日粮对绵羊血液生化指标及氮平衡的影响。结果表明,①随着DCAB的升高,各组之间血糖浓度变化差异不显著(P>0.05);血浆中尿素氮(PUN)随着DCAB的变化达显著水平(P<0.05),B组与A、C组相比血清尿素氮分别降低了24%和26%;各组血浆总蛋白受DCAB的影响不显著(P>0.05),其变化与尿素氮相反;各组血浆Ca、P受DCAB的影响不显著(P>0.05),随着DCAB水平的升高,血Ca浓度逐渐降低,B组血P浓度最高,A组次之,C组最小。②DCAB为15 m Eq/100g DM时,绵羊氮存留率最高,有利于对蛋白质的利用。

In a 3 × 3 Latin square design, 6 chosen sheep were divided into 3 groups. The influence of different level of dietary cation-anion balance（DCAB）to parameters of plasma and nitrogen metabolism of sheep fed a wheat stover based TMR diet was researched by feeding and digesting test. The results suggested that the level of DCAB increasing, there were not significant difference between each two groups（P〉0.05） ;concentrations of PUN changed obviously（P〈0.05）, compared to A and C, B decreased 24% and 26% respectively; contrary to the PUN, the total albumen of plasma present no distinct difference（P 〉0.05） ; there were not significant influence on the concentration of Ca, P of blood plasma（P〉0.05）, but the concentration of Ca decreased gradually, while the concentration of P of B was the highest value, A took the second place , C was the lowest. When the DCAB value was 15 m Eq/100 g DM, the deposit rate of nitrogen was the highest, which was advantaged to the utilization of protein.