Effects of solid-state fermented rapeseed meal replacing expanding soybean meal on the growth performance and the blood biochemical parameters in weaned piglets
A trial was conducted to study the effects of solid-state fermented rapeseed meal to replace part of expanding soybean meal on growth performance and serum biochemical parameters in weaned piglets.A total of 192 thirty-five-day-old weaned piglets(Duroc×Landrace×Yorkshire) were randomly divided into 4 treatments,4 replicate groups of 12 piglets male-female ratio was 4∶8 each for a 31-day feeding trial.In four treatment groups,solid-state fermentation rapeseed meal replaced expanding soybean meal at 0,20%,40% or 60%,respectively.The results showed that there were no significant effects on daily feed intake,daily gain,feed conversion ratio and diarrhea rate when the expanding soybean meal was replaced by the solid-state fermented rapeseed meal(P〉0.05).There were also no significant effects on the content of serum total protein,blood urea nitrogen,T3,T4,alkaline phosphatase and serum calcium(P0.05).However,the serum phosphorus was dramatically decreased in 20% and 40% of the replacement ratio,IgA was improved remarkably in 40% of the replacement ratio(P〈0.05),the improving trend of IgG,IgM was consistent with IgA though not significant(P〉0.05).The results indicated that it is feasible to use solid-state fermented rapeseed meal to replace part expanding soybean meal in diet of weaned piglets.