小麦饲粮添加非淀粉多糖酶对母猪氨基酸和常规养分消化率的影响OA

This study aimed to investigate the effects of wheat diets added with non-starch polysaccharide(NSP)enzyme on the apparent ileal digestibility(AID)of amino acids(AA),standardized ileal digestibility(SID)of AA,and apparent total tract digestibility(ATTD)of conventional nutrients in sows at different physiological stages.Six healthy multiparous(3 to 7 parities)crossbred(Landrace×Yorkshire)sows with similar body condition were surgically fitted with T-cannulas.Using a replicated 3×3 Latin square design,the six sows were allotted into three groups of two sows each and fixed within a Latin square.They were fed three diets(a nitrogen-free diet,a wheat diet,and an enzyme-added wheat diet)across three physiological stages:mid-gestation(days 40 to 74 of gestation),late gestation(days 75 to 110 of gestation),and lactation(days 5 to 34 postpartum).Each physiological stage was divided into three 7-day periods,consisting of a 5-day adap-tation period followed by a 2-day collection period for digesta and feces.The results showed as follows:1)in mid-gestation,compared with the wheat diet,the enzyme-added wheat diet significantly increased AID of argi-nine(Arg),histidine(His),lysine(Lys),tryptophan(Trp),valine(Val)and glutamic acid(Glu)in sows(P＜0.01),and extremely significantly increased the AID of isoleucine(Ile),leucine(Leu),methio-nine(Met),threonine(Thr),aspartic acid(Asp),and serine(Ser)(P＜0.05).Furthermore,the enzyme-added wheat diet extremely significantly increased the SID of Arg,His,Leu,Lys,and Glu(P＜0.01),and significantly increased the SID of Met and Val(P＜0.05).2)In late gestation,compared with the wheat diet,the enzyme-added wheat diet extremely significantly increased the AID of phenylalanine(Phe)(P＜0.01),and significantly increased the AID of crude protein(CP),Leu,Lys,Met,Trp,Glu,and tyrosine(Tyr)(P＜0.05).Additionally,it significantly increased the SID of CP,His,Lys,Phe,and Glu(P＜0.05).3)In lactation,compared with the wheat diet,the enzyme-added wheat diet extremely significantly increased the AID of Met(P＜0.01),and significantly increased the AID of His,Leu,and glycine(Gly)(P＜0.05).Mo-reover,the enzyme-added wheat diet extremely significantly increased the SID of Leu,Trp,alanine(Ala),and Ser(P＜0.01),and significantly increased the SID of CP and His(P＜0.05).4)Compared with the wheat diet,feeding the enzyme-added wheat diet significantly increased the ATTD of dry matter(DM)and gross energy(GE)in mid-gestation(P＜0.05),and extremely significantly increased the ATTD of DM,GE and CP in late gestation(P＜0.01).In conclusion,NSP enzyme supplementation in a pure wheat diet can im-prove the AID and SID of most AA,as well as the ATTD of DM,GE and CP,in sows at different physiologi-cal stages.These findings provide a scientific basis for improving the utilization efficiency of wheat-based diets and reducing the waste of feed resources through exogenous NSP enzyme supplementation.[Chinese Journal of Animal Nutrition,2026,38(4):2563-2576]