蛋白水平日变化饲粮对仔猪生长性能及养分表观消化率的影响

Effect of dynamic diets with different CP levels on growth performance and nutrient apparent digestibility of piglets

试验旨在研究蛋白水平日变化饲粮对仔猪生长性能及养分表观消化率的影响。试验配制3种能量水平相近、粗蛋白质水平分别为17.0%、18.5%和20.0%的仔猪饲粮。选用21日龄体型体况相似、健康状况良好、平均体重为(6.95±0.06)kg的仔猪90头,随机分为3组。对照组全天饲喂蛋白水平为18.5%的饲粮,试验1组早、中、晚分别饲喂蛋白水平为20.0%、18.5%和17.0%的饲粮,试验2组早、中、晚分别饲喂蛋白水平为17.0%、18.5%和20.0%的饲粮。试验期30 d。结果表明:试验1组仔猪平均日增重较对照组提高4.7%,采食量比对照组提高4.7%;试验1组与试验2组仔猪腹泻率分别降低1.63%和0.92%,差异均不显著(P>0.05);与对照组相比,试验1组和试验2组各项营养指标的表观消化率均有提高,试验1组粗蛋白质和粗脂肪的表观消化率显著提高(P<0.05)。结果表明,依据仔猪自身生物节律为仔猪早、中、晚分别提供20.0%、18.5%和17.0%蛋白水平的饲粮可提高其生长性能,降低腹泻发生率,并对营养物质消化产生积极作用。

The experiment was to study the effect of dietary protein level on growth performance and nutrient apparent digestibility of piglets.Three diets with similar energy levels and 17.0%,18.5%and 20.0%CP levels were prepared.Ninety 21-day-old piglets with similar body shape,good health and average body weight(6.95~0.06)kg were randomly divided into three groups.The control group was fed with 18.5%protein all day,group 1 was respectively fed with 20.0%,18.5%and 17.0%protein early,middle and late and group 2 was fed with 17.0%,18.5%and 20.0%protein in the early,middle and late days respectively.The experiment lasted for 30 d.The results showed that the daily gain of the piglets in the high-low protein group was 4.7%higher than that of the control group,the feed intake was 4.7%higher than that of the control group,and the diarrhea rates of the piglets in the high-low protein group and the low-high protein group were 1.63%and 0.92%lower respectively(P>0.05).The apparent digestibility of CP and CE were significantly increased in group 1(P<0.05).The results showed that the diets with 20.0%,18.5%and 17.0%protein levels for early,middle and late piglets could improve the growth performance and reduce the incidence of diarrhea,and has the positive function to the nutrient substance digestion.