哺乳期补饲代乳品对仔猪生长性能、营养物质消化率及血清生化指标的影响

试验旨在研究哺乳期补饲代乳品对仔猪生长性能、营养物质消化率及血清生化指标的影响，并探讨代乳品对缩短仔猪断奶日龄的可行性。选用120头（12窝）5日龄、平均体重（3.12±0.63）kg的仔猪，随机分为两组，每组60头（6窝，每窝为1个重复）。对照组补饲教槽料至28日龄断奶；试验组补饲代乳品和教槽料（代乳品：教槽料=1：1）至21日龄断奶，断奶后继续饲喂代乳品和教槽料至28日龄；28日龄后试验组和对照组饲喂相同日粮至70日龄。结果显示：①整个试验期，两组仔猪在5、21、28和70日龄时体重差异均不显著（P>0.05）；在5~21、22~28和5~28日龄阶段，试验组仔猪平均日采食量（ADFI）和料重比（F/G）均极显著或显著高于对照组（P < 0.01；P < 0.05）；而在22~28日龄阶段，试验组平均日增重（ADG）极显著低于对照组（P<0.01）。②试验组仔猪保育期的日粮总能（GE）、干物质（DM）、有机物（OM）和粗脂肪（EE）的消化率均显著高于对照组（P<0.05）。③在70日龄时，两组仔猪各项血清生化指标均无显著差异（P>0.05）。结果提示，补饲代乳品可显著增加哺乳期仔猪的采食量，同时促进保育期仔猪对日粮中营养物质的消化吸收。从保育期末体重来看，哺乳期补饲代乳品的仔猪提前至21日龄断奶是可行的。

Effect of Supplementary Feeding Milk Replacer on Growth Performance,Nutrient Digestibility,Serum Biochemistry Indexes in Piglets during Lactation

This experiment was conducted to study the effect of supplementary feeding milk replacer on growth performance,nutrient digestibility,serum biochemistry indexes in piglets during lactation,and explore the feasibility of shorten the weaning age of piglets by feeding milk replacer. One hundred and twenty (twelve litters) 5 days old piglets with average body weight of (3.12±0.63)kg were assigned into two groups with sixty piglets per group (six litters)and one litter of piglets per replicate. The piglets in control group received supplementary creep feed and were weaned on 28 days old,whereas the piglets in experimental group received supplementary creep feed and milk replacer (creep feed:milk replacer=1:1) and were weaned on 21 days old. The piglets in experimental group were continued feeding with creep feed and milk replacer until 28 days old. All piglets were fed with same diets from 28 to 70 days old. The results showed as follows:① Comparing with control group,the body weight of piglets in experimental group were not significantly changed at 5,21,28 and 70 days old (P>0.05),ADFI and F/G were extremely significantly or significantly increased during 5 to 21 days old,22 to 28 days old and 5 to 28 days old (P < 0.01;P < 0.05),while ADG was extremely significantly decreased during 22 to 28 days old compared with control group (P<0.01).② The digestibility of GE,DM,OM and EE of experimental group were significant higher than control group (P<0.05).③ All serum biochemistry indexes between the two groups had no significant differences (P>0.05). In conclusion,supplementary milk replacer feeding could increase the feed intake and dietary digestibility of weaned piglets. The age of wean could be forward to 21 days old according to the final body weight of weaned piglets when fed milk replacer supplementation.