饲料二次制粒对育肥猪生产性能和免疫指标的影响

Effect of twice pelleting feed on growth performance and immunity in growing-finishing pigs

选用60头体质量为35.29±1.5 kg的育肥猪,随机分成3组,每组4个重复,每个重复5头猪,在日粮配方一致的基础上,对照组饲喂粉状料,试验Ⅰ组饲喂一次制粒颗粒料,试验Ⅱ组饲喂二次制粒颗粒料,研究饲料二次制粒对育肥猪生产性能和免疫指标的影响.结果表明:采用二次制粒处理日粮的试验Ⅱ组平均日增质量比对照组提高3.7%,比试验Ⅰ组提高1.75%,差异显著(P<0.05);料肉比比对照组降低11.48%,比试验Ⅰ组降低3.91%,差异显著(P<0.05);发病率比对照组降低29.29%,比试验Ⅰ组降低8.89%,差异显著(P<0.05);试验前期,各试验组白细胞数、红细胞数、淋巴细胞数及IgG的质量浓度差异均不显著,但试验后期的31 d、46 d和60 d,试验Ⅱ组均显著高于对照组.由此可知采用二次制粒工艺处理配合饲料可以提高育肥猪的生长性能和免疫指标.

In order to study the influence of twice pelleting feed on the growth performance and immune effect of growing-finishing pigs,the total of 60 similar growing-finishing pigs were randomly divided into 3 groups.Based on same daily ration and ingredient,the compared group raised by compound feed,the testament group Ⅰand Ⅱ raised by compound feed dealt with first and twice pelleting,respectively.The results showed as follows：Compared with the control group,the average daily gain weight of testment group Ⅱ was increased by 3.7%（P 〈0.05）,feed conversion ratio of testment group Ⅱ was decreased by 11.48% and incidence of testment group Ⅱ was decreased by 29.29%.The number of leukocyte white blood cell,red blood cell,lymphocyte and the concentration of Ig G have no significant difference in the earlier stage of experiment.In the day of 31,46 and 60,the number of leukocyte white blood cell,red blood cell,lymphocyte and the concentration of Ig G of testment group Ⅱ were significantly higer than that of control group.These results indicate that completed feed processed by twice pelleting could improve the growth performance and immunity of growing-finishing pigs.