Study On Effect Of Different NSP Enzyme Preparations In Wheat-based Diet For Pigs

The purpose of this study was to evaluate the effect of wheat dietary supplementation with two selected NSP enzymes in vivo on the growth performance of weaned piglets and growing pigs.(Trial1) Wheat was treated with seven different NSP enzymes at pH2.0and pH7.0for2h, respectively. Non-starch polysaccharides (NSP) of wheat was more degraded in vitro by Enzyme A (Made in Shan Dong) and Enzyme G (Made in Guang Dong2) in comparison with the other five enzymes.(Trial2) A total of240piglets weaned at25d, with the average body weight (7.41±0.14kg) were randomly assigned to four dietary enzyme treatments as follows:Treatment1(corn-soybean diet), Treatment2(20%wheat diet), Treatment3(Treatment2+Enzyme G) and Treatment4(Treatment2+Enzyme A), with3replicates per treatment and20piglets per replicate, Feed and water were provided ad libitum for a27d trial. Results showed that they were no significant effect observed on the growth performance and diarrhea rate of piglets within all treatments (P>0.05).(Trial3) A total of112growing piglets (21.37±0.13kg) were randomly assigned into7dietary enzyme treatments as:A (100%corn), B (50%wheat replace corn), C (100%wheat replace corn), D (B+250g/t Enzyme A), E (C+500g/t Enzyme A), F (B+250g/t Enzyme G) and G (C+500g/t Eenzyme G),with4replicates per treatment and4piglets per relicate. Results showed that no difference was observed in the growth performance when wheat replacing50%of corn in the diet (P>0.05). However, the growth performance was trend to decrease when wheat replacing100%of corn in diet (P>0.05). Meanwhile the supplements of NSP enzymes in diets containing different levels of wheat could improve the growth performance of growing pigs (P>0.05).In conclusion, results of the present study demonstrated that NSP enzymes with higher activities of glucanase and xylanase or xylanase had the best effect on degrading NSP in wheat, and also these enzymes could improve the growth performance of pigs in different growing stages fed with wheat-based diets.