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Twenty Landrace \u00d7 Yorkshire sows received the same basal corn\u2013soybean diets (folic acid, 1.3 mg kg<jats:sup>\u22121<\/jats:sup>) from gestation to parturition (day 107). After parturition, sows were allotted to four treatments: control group (folic acid supplementation level, 0 mg kg<jats:sup>\u22121<\/jats:sup>), group 1 (12.5 mg kg<jats:sup>\u22121<\/jats:sup>), group 2 (50 mg kg<jats:sup>\u22121<\/jats:sup>) and group 3 (100 mg kg<jats:sup>\u22121<\/jats:sup>), with five replicates of one sow. The experiment lasted for 21 days.<\/jats:p><jats:p><jats:bold>RESULTS:<\/jats:bold> (1) Folic acid increased milk production (<jats:italic>P<\/jats:italic> &gt; 0.05). (2) Compared with the control, supplementation with folic acid (100 mg kg<jats:sup>\u22121<\/jats:sup>) increased the concentration of butter fat, total substance and non\u2010lipoid substance significantly (<jats:italic>P<\/jats:italic> &lt; 0.01), the concentration of milk protein was also significantly increased in group 2 and group 3 (<jats:italic>P<\/jats:italic> &lt; 0.01) in milk. (3) Folic acid supplementation could increase litter weaning weight, average piglet weaning weight and average piglet daily gain (<jats:italic>P<\/jats:italic> &gt; 0.05).<\/jats:p><jats:p><jats:bold>CONCLUSION:<\/jats:bold> These results suggested that supplementation with folic acid in the diets of lactating sows increases milk production, improved milk quality and the performance of piglets. Copyright \u00a9 2011 Society of Chemical Industry<\/jats:p>","DOI":"10.1002\/jsfa.4469","type":"journal-article","created":{"date-parts":[[2011,7,18]],"date-time":"2011-07-18T08:15:35Z","timestamp":1310976935000},"page":"2371-2377","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":24,"title":["Effects of folic acid on the performance of suckling piglets and sows during 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