壳聚糖铁对仔猪生长性能及免疫功能的影响

选24头体重相近、日龄相同的健康仔猪随机分为6组:1组为对照组,饲喂基础日粮;2组为壳聚糖组,在基础日粮中添加壳聚糖300 mg/kg;3组为硫酸亚铁组,以硫酸亚铁的形式在基础日粮中添加铁100 mg/kg;4~6组为壳聚糖铁组,以壳聚糖铁的形式分别在基础日粮中添加铁70 mg/kg、100 mg/kg和130 mg/kg,研究壳聚糖铁对仔猪生产性能及免疫功能的影响。结果显示:3~6组仔猪平均日增重显著高于第1组、第2组(P<0.05);第6组仔猪料重比显著低于第1组(P<0.05)。试验至15 d,第5、第6组仔猪外周淋巴细胞转化率显著高于第1~4组(P<0.05或P<0.01);第4组、第5组仔猪血清球蛋白含量显著高于第1组和第3组(P<0.05)。试验至30 d,第6组仔猪外周淋巴细胞转化率显著高于第1、第2组(P<0.05或P<0.01);第3~5组显著高于第1组(P<0.05)。试验至45 d和60 d,第5组、第6组仔猪外周淋巴细胞转化率显著高于第1~3组(P<0.05)。试验至45 d,第5组和第6组仔猪血清球蛋白含量显著高于第1组和第2组(P<0.05)。试验至60 d,第4~6组仔猪血清球蛋白含量显著高于第1组和第3组(P<0.05)。试验表明,壳聚糖铁能显著提高仔猪的生产性能,与硫酸亚铁基本一致;壳聚糖铁能增强仔猪免疫功能,效果要显著优于硫酸亚铁。

Effects of chitosan-Fe on the production performances and immune functions of piglets

Twenty-four healthy piglets with similar body weight and same age were divided into 6 groups randomly with 4 replications per group to study the effect of chitosan-Fe on the production performance and the immune function in 60 days.Group I(the control group) was fed alone with the basal diet.Group II was fed with basal diets supplemented with 300 mg/kg chitosan.Group III was supplemented with 100 mg/kg Fe as FeSO4 in basal diets.Groups IV,V and VI were basal diets supplemented with 70,100 or 130 mg/kg Fe as chitosan-Fe,respectively.The results showed that the body weight gains of piglets were significantly increased when the diets were supplemented with Fe as FeSO4 or chitosan-Fe(P<0.05).The ratio of feed and weight was significantly decreased when the piglets were fed diets containing the 130 mg/kg Fe as chitosan-Fe(P<0.05).The lymphocyte transformation rates of piglets fed with diets supplemented with 100 or 130 mg/kg Fe as chitosan-Fe were higher than other(P<0.05 or P<0.01).The serum immunoglobulin concentrations of piglets fed with diets supplemented with 70 or 100 mg/kg Fe as chitosan-Fe were higher than 100 mg/kg Fe as FeSO4 or control diet(P<0.05) on 15th day.The lymphocyte transformation rates were significantly increased(P<0.05 or P<0.01) when piglets were fed with diets supplemented with Fe on 30th day.The lymphocyte transformation rates of piglets fed with diets supplemented with 100 or 130 mg/kg Fe as chitosan-Fe were higher than 100 mg/kg Fe as FeSO4 or control diet(P<0.05),and the serum immunoglobulin of piglets fed with diets supplemented Fe as chitosan-Fe were higher than 100 mg/kg Fe as FeSO4 or control diet(P<0.05) on 45th day or 60th day.In summary,the findings suggested that chitosan-Fe can improve the production performance of piglets same as FeSO4,and the immune function of piglets is increased by chitosan-Fe,better than FeSO4.