摘要
本试验通过与未包被氧化锌(Zn O)对比,考察包被氧化锌(C-Zn O)对断奶仔猪生长性能、血清生化指标、营养物质表观消化率影响,旨在研究C-Zn O取代传统Zn O的效果,对生产实践中减少Zn O用量的可能性和加强其效果的可能性进行探讨。选28日龄遗传背景相似、平均体重为(9.32±0.38)kg的断奶大白仔猪120头,随机分成5组,每组4个重复,每个重复6头猪(公母各占1/2)。对照组饲喂基础饲粮,试验组分别在基础饲粮中添加2 400 mg/kg Zn O和1 800、2 400、2 760 mg/kg C-Zn O。试验期为28 d。结果表明:与对照组相比,饲粮中添加2 400 mg/kg C-Zn O可极显著提高断奶仔猪的平均日增重(P<0.01),显著降低料重比(P<0.05),极显著降低腹泻率(P<0.01),其中2 400 mg/kg C-Zn O组的平均日增重极显著高于Zn O组(P<0.01)。与对照组相比,2 400 mg/kg C-Zn O组血清生长激素、免疫球蛋白G、免疫球蛋白M含量极显著升高(P<0.01);粗蛋白质和粗脂肪的表观消化率极显著改善(P<0.01);大肠杆菌菌群数量极显著降低(P<0.01),双歧杆菌菌群数量极显著升高(P<0.01)。2 400 mg/kg C-Zn O组与Zn O组相比,血清生长激素含量显著提高(P<0.05),碱性磷酸酶活性显著降低(P<0.05)。1 800 mg/kg C-Zn O组与Zn O组生长性能、血清指标及营养物质表观消化率差异均不显著(P>0.05)。Zn O组与对照组相比腹泻率显著降低(P<0.05),其他生长性能指标差异不显著(P>0.05)。本研究结果提示:添加2 400 mg/kg C-Zn O可显著提高断奶仔猪的生长性能,改善营养物质消化状况,有效控制仔猪腹泻;1 800 mg/kg C-Zn O可替代2 400 mg/kg Zn O。
This trial was conducted to study the effects of coated ZnO （ C-ZnO） on the growth performance, the serum biochemical indices and nutrient apparent digestibility of weaner piglets, by compared with uncoated ZnO, aimed at research the effects of C-ZnO instead of traditional ZnO, and discussed production practice to reduce the possibility of the dosage of ZnO and enhance its effect. A total of 120 Large-White weaner piglets were randomly divided into 5 groups with 4 replicates per group and 6 piglets per replicate. Piglets in control group were fed a basal diet, the four groups were fed the basal diet supplemented with 2 400 mg/kg ZnO and 1 800, 2 400, 2 740 mg/kg C-ZnO, respectively. The trial lasted for 28 days. The results showed as follows：compared with control group, the average daily gain in the group supplemented with 2 400 mg/kg C-ZnO was increased significantly （ P〈0.01） , the ratio of feed to gain was decreased significantly （ P〈0.05） , and the di-arrhea rate was decreased significantly （ P〈0.01） . The average daily gain of 2 400 mg/kg C-ZnO group was significantly higher than that of ZnO group （ P〈0. 01 ） . Compared with control group, serum contents of growth hormone （ GH） , immunoglobulin G （ IgG） , immunoglobulin M （ IgM） and the digestibility of crude protein and ether extract were significantly increased in 2 400 mg/kg C-ZnO group （ P〈0.01） . Compared with control group, a significant reduction in E. coli number （ P〈0.01） and a significantly increase in Bifidobacteria number were also observed in 2 400 mg/kg C-ZnO group （ P〈0.01） . Compared with ZnO group, serum GH content was significantly increased （P〈0.05） and alkline phosphatase （AKP） activity was significantly de-creased （ P〈0.05） in 2 400 mg/kg C-ZnO group. There were no differences in the growth performance, serum indices and nutrients apparent digestibility between the 1 800 mg/kg C-ZnO and ZnO groups （ P〉0.05） . The diarrhea rate in ZnO groups was significantly decreased （ P〈0.05） compared with control group, but the other growth performance had no significant difference （ P〉0.05） . In conclusion, supplementation of 2 400 mg/kg coated ZnO in weaner piglets diet can improve the growth performance, improve the nutrient digestible situa-tion and control the diarrhea rate. The effect of 2 400 mg/kg uncoated ZnO is similar to that of 1 800 mg/kg coated one.
出处
《动物营养学报》
CAS
CSCD
北大核心
2015年第6期1779-1786,共8页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
国家自然科学基金(31101253
30972112)
关键词
包被氧化锌
断奶仔猪
生长性能
血清生化指标
腹泻率
营养物质表观消化率
coated ZnO
weaner piglet
growth performance
serum biochemical indices
diarrhea rate
nu-trient apparent digestibility
