饲粮添加甜菜碱对巴马香猪繁殖性能、初乳成分及血浆代谢物和繁殖激素含量的影响

本试验旨在研究饲粮添加甜菜碱对巴马香猪繁殖性能、初乳成分及血浆代谢物和繁殖激素含量的影响。选取3~7胎次巴马香猪40头,随机分为2组,每组20头,单栏饲养。对照组饲喂基础饲粮,试验组在基础饲粮中添加3.5 kg/t甜菜碱盐酸盐。试验期为母猪配种后第3天至分娩后第21天。结果表明:与对照组相比,饲粮添加甜菜碱显著降低仔猪死亡率(P<0.05),增加断奶仔猪数(P=0.087);饲粮添加甜菜碱显著增加初乳中乳蛋白和尿素氮含量(P<0.05);饲粮添加甜菜碱显著降低妊娠第75天血浆总蛋白(TP)含量(P<0.05),显著降低妊娠第105天血浆TP含量和谷草转氨酶(AST)活性(P<0.05),显著增加妊娠第75天血浆碱性磷酸酶(ALP)活性以及产后第7天血浆AST和ALP活性(P<0.05),且妊娠第105天血浆ALP活性呈增加趋势(P=0.073);饲粮添加甜菜碱显著降低妊娠第45天血浆催乳素(PRL)、孕酮(PROG)、促卵泡素(FSH)和雌二醇(E2)含量以及妊娠第75天血浆PRL和PROG含量(P<0.05),且妊娠第75天血浆E2含量(P=0.061)和妊娠第105天血浆FSH含量(P=0.062)呈下降趋势。综上所述,饲粮添加甜菜碱可改善初乳成分和血浆代谢物含量,降低血浆繁殖激素含量,进而增加断奶仔猪数。

Effects of Dietary Betaine Supplementation on Reproductive Performance,Colostrum Composition and Plasma Metabolite and Reproductive Hormone Contents of Bama Mini-Pigs

The present study was conducted to determine the effects of dietary betaine supplementation on re?productive performance,colostrum composition and plasma metabolite and reproductive hormone contents of Bama mini?pigs.Forty Bama mini?pigs with 3 to 7 parities were randomly divided into two groups,with 20 pigs per group,and fed individually.Pigs in the control group were fed a basal diet,while the others in the ex?perimental group were fed the basal diet supplemented with 3.5 kg/t betaine hydrochloride.The trial period was from day 3 after mating to postpartum day 21.The results showed that compared with the control group,dieta?ry betaine supplementation significantly decreased the mortality rate of piglets(P<0.05),and increased the number of piglets at weaning(P=0.087);dietary betaine supplementation significantly increased the milk pro?tein and urea nitrogen contents in colostrum(P<0.05);dietary betaine supplementation significantly decreased the plasma total protein(TP)content on pregnancy day 75(P<0.05),significantly decreased the plasma TP content and glutamic oxaloacetic transaminase(AST)activity on pregnancy day 105(P<0.05),significantly increased the plasma alkaline phosphatase(ALP)activity on pregnancy day 75 and plasma AST and ALP ac?tivities on postpartum day 7(P<0.05),and the plasma ALP activity on pregnancy day 105 was showed an in?creasing trend(P=0.073);dietary betaine supplementation significantly decreased the contents of prolactin(PRL),progesterone(PROG),follicle stimulating hormone(FSH)and estradiol(E2)in plasma on preg?nancy day 45 and contents of PRL and PROG in plasma on pregnancy day 75(P<0.05),and the plasma E2 content on pregnancy day 75(P=0.061)and plasma FSH content on pregnancy day 105(P=0.062)were showed an decreasing trend.In conclusion,dietary betaine supplementation can improve the colostrum compo?sition and plasma metabolite contents,decrease plasma reproductive hormone contents,and then increase the number of piglets at weaning.