香菇多糖对仔猪生产性能、部分血清激素和免疫指标的影响

Effects of Lentinus edodes Polysaccharide on Growth Performance, Some Serum Hormone and Immune Indices in Piglets

本试验在基础日粮中添加香菇多糖,研究其对仔猪生产性能、部分血清激素及免疫指标的影响。120头(11.34±0.62)kg的长×大二元杂交仔猪,随机分为4组,每组设5个重复,每个重复6头猪。第Ⅰ组为对照组,饲喂基础日粮,第Ⅱ、Ⅲ和Ⅳ组分别饲喂在基础日粮中添加150、300和450 mg/kg香菇多糖的试验日粮。试验期28 d。结果显示:添加香菇多糖能够显著提高仔猪试验0～14 d、14～28 d及试验全期的平均日增重(ADG)(P<0.05);试验各组的平均日采食量(ADFI)在试验0～14 d及试验全期均得到显著提高(P<0.05);而料重比(F/G)在各时期并没有显著降低(P>0.05)。第Ⅱ组腹泻频率与第Ⅰ组相比下降了23.08%(P<0.05),第Ⅲ组和第Ⅳ组较第Ⅰ组各下降了53.85%(P<0.01)。各试验组生长激素(GH)、三碘甲腺原氨酸(T)及甲状腺素(T4)水平随香菇多糖添加量的增加而提高,皮质醇(Cor)水平下降,其中第Ⅳ组GH和T_((3))水平极显著升高(P<0.01),而Cor则以第Ⅲ组下降最叫显(P<0.01)。试验各组血清IgM含量有所提高,但只有第Ⅳ组显著提高(P<0.05),而IgG和补体C4含景变化不显著(P>0.05)。本试验结果表明,在仔猪日粮中添加300 mg/kg香菇多糖能够显著提高日增重和采食量,并且GH、T_((3))水平显著提高,Cor水平显著下降,仔猪生产性能得到改善。

This experiment was conducted to investigate the effects of Lentinus edodes polysaccharide （LEP） on growth performance, some serum hormone and some immune indices in piglets. One hundred and twenty pigs （Landrace × Large White） with an initial body weight of （11.34 ± 0.62） kg were randomly allotted to four groups, each group contained five pens and each pen contained six pigs. Pigs were raised for 28 days. Group Ⅰ was fed control diet, and LEP was supplemented at 150, 300 and 450 mg/kg based on control diet for group Ⅱ , group Ⅲ and group Ⅳ, respectively. The results showed that the ADG of pigs in group Ⅱ , group Ⅲ and group Ⅳ was significantly increased （P〈0.05） in the period of 0-14 d, 14-28 d and 0-28 d; ADFI was also significantly increased （P〈0.05） in the period of 0-14 d and 0-28 d; but no difference was found in F/G （P〉0.05）. The occurrence rate of diarrhea in group Ⅱ was decreased by 23.08% compared with that in control group （P〈0.05） ; meantime that in group Ⅲ and group Ⅳ was also decreased by 53.85% compared with that in control group （P〈0.01）. GH, T3 and T4 were increased while cortisol was decreased along with the supplement of LEP, GH and T3 in group Ⅳ were increased （P〈0.05） while cortisol in group Ⅲ was decreased （P〈0.05）. IgM in group Ⅱ , group Ⅲ and group Ⅳ was slightly increased, but only lgM in group Ⅳ was significantly increased （P〈0.05）. However, no difference occurred for the IgG and alexin C4. It was concluded that supplement of 300 mg/kg LEP improved the growth performance and hormone indices in piglets.