Effects of enzymolysis soybean meal on growth performance,nutrients apparent digestibility,and immunity of piglets
This experiment was conducted to investigate the effects of different levels of enzymolysis soybean meal replacing conventional soybean meal on the growth performance,nutrient apparent digestibility,and immune function of weaned piglets.A total of two hundred and forty 21-day-old piglets were randomly divided into four groups with six replicates per group and 10 piglets per replicate.The piglets in each group were fed diets supplemented with 0,5％,10％,and 20％enzymolysis soybean meal,respectively,the pre-feeding period was seven days and the formal experiment period was 28 days.The results showed that compared with the control group,the final weight,average daily weight gain and total weight gain of piglets in the 10％and 20％enzymolysis soybean meal groups were significantly increased(P＜0.05),and the feed-to-weight ratio and diarrhea rate were significantly decreased(P＜0.05).The apparent digestibility of dry matter and organic matter of the 10％and 20％enzymolysis soybean meal groups were significantly higher than that of the control group(P＜0.05),and the apparent digestibility of crude protein and total energy were significantly higher in the piglets in the 5％,10％,and 20％enzymolysis soybean meal groups than in the control group(P＜0.05).Compared with the control group,the 10％and 20％enzymatically digested soybean meal groups significantly decreased the levels of interleukin-1β,interleukin-6 and tumor necrosis factor-α(P＜0.05),and increased the level of interleukin-10(P＜0.05).The 10％and 20％enzymatically digested soybean meal groups significantly increased the levels of serum immunoglobulin A and immunoglobulin M(P＜0.05),and decreased the levels of D-lactic acid,diamine oxidase,and endotoxin(P＜0.05).The study indicates that enzymatically digested soybean meal can improve the growth performance,immune function of piglets,promote the body's digestion and absorption of nutrients,reduce the rate of diarrhea,and improve intestinal health.According to the results of this experiment and feed production cost considerations,enzymatic soybean meal is more appropriate to replace 10％of conventional soybean meal.
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