大豆蛋白酶解物对21日龄早期断乳仔猪生长性能及内分泌水平的影响

将16头体重相近的仔公猪分为对照组和处理组。对照组仔猪吮吸母乳到28日龄断乳，处理组仔猪21日龄断乳后，每头每天添喂2g大豆蛋白的胃蛋白酶解物20mL，两组分别随机选6头仔猪于32日龄宰杀。结果表明：与对照组相比，添喂大豆蛋白酶解物的仔猪，日采食量增加7．19％，而日增重低于对照组12．67％，但差异均不显著；其胸腺的绝对质量和相对质量分别较对照组的高105．90％（P〈0．01）和96．30％（P〈0．01），脾脏的绝对质量和相对质量分别较对照组高43．78％（P〈0．01）和27．52％（P〈0．05），肝脏的绝对质量较对照组的高11．42％（P〉0．05），肝脏的相对质量与对照组的相近。添喂大豆蛋白酶解物的仔猪，其血清胰岛素水平较对照组的高68．13％（P〈0．05），血清瘦素水平较对照组的高4．65％（P〈0．01），血清T4水平较对照组的高19．68％（P=0．05），L水平与对照组的相近，血清胃泌素水平较对照组的高8．30％（P〉0．05），血清IL-2的水平较对照组高8．73％（P=0．05），血清皮质醇的水平较对照组降低了27．25％（P〉0．05）。结论：给21日龄早期断乳仔猪添喂一定量的大豆蛋白质的胃蛋白酶解物是可行的。

Effect of soybean protein hydrolysate on the growth and incretion of weaned at 21 day-old piglets

Sixteen male piglets were divided into the control group and treatment group.The piglets in the control group weaned on 28 day-old.Each piglet in the treatment group weaned on 21 day-old and was fed with 20 mL of 2 g soybean protein pepsin-hydrolysate per day.Six piglets of each group were randomly slaughtered on 32-day.The results show that,compared with the control group,feed intake of piglet in the treatment group increased by 7.19%,whereas the body weight decreased by 12.67%.In the treatment group,the absolute and relative weight of thymus of piglet respectively increased by 105.90%(P<0.01)and 96.30%(P<0.01),spleen increased by 43.78%(P<0.01)and 27.52%(P<0.05),the absolute and the relative weight of liver had no significant difference.Feeding soybean protein hydrolysate increased the serum leptin and insulin by 4.65%(P<0.01)and 68.13%(P<0.05)respectively,T_4 by 19.68%(P=0.05),interluekin-2 by 8.73%(P=0.05),gastrin by 8.30%,decreased the serum cortisol by 27.25%,whereas had no effect on the serum T_3.The conclusion is that the method is feasible to feed piglets early weaned on 21 day-old by soybean protein pepsin-hydrolysate.