复合酸化剂对断奶仔猪生长性能、养分利用率及肠道组织形态的影响

Effects of compound acidifier on growth performance,nutrient utilization efficiency,and intestinal tissue morphology of weaned piglets

文章旨在研究复合酸化剂(CompoundAcidifier,CA)对断奶仔猪生长性能、养分利用率及肠道组织形态的影响。试验将120头28d健康、无病、初始体重[(8.36±0.49)kg]相近的三元杂交仔猪随机分为4组,每组6个重复,每个重复5头仔猪。其中,对照组(CON组)参考《猪饲养标准》(NY/T65-2004)饲喂玉米-豆粕型基础日粮,其余3组饲喂基础日粮+2kg/t(CA2组)、4kg/t(CA4组)、6kg/t(CA6组)复合酸化剂的试验日粮,试验为期35d。结果表明:(1)CA2组、CA4组、CA6组仔猪的末重、平均日增重显著高于CON组(P <0.05),CA2组、CA4组、CA6组仔猪的料重比、腹泻率显著低于CON组(P <0.05);(2)与CON组相比,CA2组仔猪对总能、粗纤维的利用率显著提高(P <0.05),与CON组相比,CA2组、CA4组、CA6组仔猪对粗蛋白质、有机物的利用率显著提高(P <0.05);(3)十二指肠中,CA2组、CA4组、CA6组绒毛高度、绒隐比显著高于CON组(P <0.05),空肠中,CA2组、CA4组、CA6组绒毛高度、绒隐比显著高于CON组(P <0.05)。综上所述,复合酸化剂能促进仔猪生长发育,提高养分利用率,改善肠道组织形态,为降低饲养成本,仔猪基础日粮中复合酸化剂的建议添加量为2kg/t。

This experiment aims to investigate the effects of Compound Acidifier(CA)on the growth performance,nutrient utilization efficiency,and intestinal tissue morphology of weaned piglets.120 healthy,disease-free,and similar initial weight [(8.36±0.49)kg] ternary hybrid piglets were selected and randomly divided into 4 groups,with 6 replicates in each group and 5piglets in each replicate.Among them,the control group(CON group)was fed a corn soybean meal based diet in accordance with the“Pig Feeding Standards”(NY/T 65-2004),while the other three groups were fed a basic diet of+2 kg/t(CA2 group),4 kg/t(CA4 group),and 6 kg/t(CA6 group)with a compound acidifier.The experimental period was 35 days.The results showed that:(1)The final weight and average daily gain of piglets in the CA2,CA4,and CA6 groups were significantly higher than those in the CON group(P < 0.05),while the feed weight ratio and diarrhea rate of piglets in the CA2,CA4,and CA6 groups were significantly lower than those in the CON group(P < 0.05);(2)Compared with the CON group,the utilization rates of total energy and crude fiber in CA2 group piglets were significantly increased(P < 0.05).Compared with the CON group,the utilization rates of crude protein and organic matter in CA2,CA4,and CA6 groups piglets were significantly increased(P < 0.05);(3)In the duodenum,the villus height and villus to crypt ratio of the CA2,CA4,and CA6 groups were significantly higher than those of the CON group(P < 0.05),while in the jejunum,the villus height and villus to crypt ratio of the CA2,CA4,and CA6 groups were significantly higher than those of the CON group(P < 0.05).In summary,compound acidifier can promote the growth and development of piglets,improve nutrient utilization efficiency,and improve intestinal tissue morphology.To reduce feeding costs,the recommended amount of compound acidifier added to the basic diet of piglets is 2 kg/t.