Effects of different soy protein sources on growth performance and nutrient digestibility of weaning piglet
The present study was conducted to investigate the effects of soy protein concentrate(SPC)and soybean meal (SBM)from different origins in the diet on growth performance and nutrient digestibility of weanling pigs. This study included two trials. In experiment 1,five hundred weaning piglets were randomly allotted to five groups,and each with 5 replicates of 20 pigs. In experiment 2,three hundred weaning piglets were randomly allotted to three groups,and each with 5 replicates of 20 pigs. In phase I(21~49 d of age)one of five diets that differed in the soy protein source used. Two diets were based on SPC from USA or Brazil origin and the other three diets were based on SBM from USA,Brazil or Argentina origin. In phase Ⅱ (49 to 57 d of age),all pigs received a common maize-SBM diet. In experiment 1,growth performance was similar for piglets fed diets containing SPC than for piglets fed diets containing SBM(P>0.05). In phase I,post-weaning diarrhea(PWD) was lower in pigs fed SPC than that in pigs fed SBM(P<0.05). The USA meal in diet improved average daily gain(ADG) (P < 0.05)and G:F ratio(P < 0.01)compared with the Brazil and Argentina meals in diet. The coefficient of total tract apparent digestibility of crude protein(CP)in pigs fed SPC was higher(P<0.05)than that in pigs fed SBM. In experiment 2,growth performance of the pigs was not affected by the soy product used(P<0.05),Pigs fed the USA and Brazil SBM had lower incidence(P < 0.05)of PWD than pigs fed the Argentina SBM. No differences in the nutrient digestibility were detected between diets based on SPC and diets based on SBM,or between SPC origins but nutrient digestibility tended to be higher(P<0.10)for the USA than for the South American SBM. It was concluded that no significant difference was found in growth performance of piglets,when SBM was replaced by SPC in diets,while SPC could improve CP digestibility and decrease diarrhea.
weaning pigletsoybean mealsoy protein concentrategrowth performancenutrient digestibility
NETL
NSTL
万方数据
维普
