Tremblay G F, Matte J J, Girard C L, Brisson G J
Université Laval, Québec, Canada.
J Anim Sci. 1989 Mar;67(3):733-7. doi: 10.2527/jas1989.673733x.
The purpose of this trial was to determine whether an addition of folic acid to a commercial diet would affect serum Zn, Fe and Cu status in sows between weaning and 30 d of gestation. At weaning, 162 sows were assigned randomly to six groups and housed in individual cages fitted on a slatted floor. There were six treatments according to a 2 X 3 factorial arrangement: two levels of supplementary folic acid (0 and 5 mg/kg of diet) and three treatments to stimulate ovulation (none, flushing and pregnant mare serum gonadotropin [PMSG] i.m. injection). Control groups were fed a commercial-type diet, and folic acid-treated groups were fed the same diet supplemented with 5 mg/kg of pteroylglutamic acid. All sows were mated twice within 7 d after weaning. Of the 162 animals originally selected, 123 sows were pregnant and used in this trial. Serum folates, Zn, Cu and Fe were measured at weaning, mating and 30 d of gestation. Serum Cu, Zn and folates increased between weaning and mating, and then decreased to 30 d of gestation. Supplementing the commercial diet with folic acid elevated serum folates between weaning and d 30 of gestation (P less than .001). Folic acid supplementation also was associated with a higher level of serum Zn at 30 d of gestation. Supplemental folic acid had no effect on the pattern of serum Cu and Fe throughout the experiment.(ABSTRACT TRUNCATED AT 250 WORDS)
本试验的目的是确定在商业日粮中添加叶酸是否会影响断奶至妊娠30天母猪的血清锌、铁和铜水平。断奶时，162头母猪被随机分为六组，饲养在装有漏缝地板的个体笼中。根据2×3析因设计有六种处理：两种叶酸补充水平（0和5毫克/千克日粮）和三种刺激排卵的处理（无、冲洗和肌肉注射孕马血清促性腺激素[PMSG]）。对照组饲喂商业型日粮，叶酸处理组饲喂添加5毫克/千克蝶酰谷氨酸的相同日粮。所有母猪在断奶后7天内配种两次。在最初选择的162头动物中，123头母猪怀孕并用于本试验。在断奶、配种和妊娠30天时测定血清叶酸、锌、铜和铁。血清铜、锌和叶酸在断奶至配种期间升高，然后在妊娠30天时下降。在商业日粮中添加叶酸可提高断奶至妊娠30天期间的血清叶酸水平（P＜0.001）。补充叶酸还与妊娠30天时较高的血清锌水平有关。在整个实验过程中，补充叶酸对血清铜和铁的模式没有影响。（摘要截短至250字）
