Matte J J, Girard C L, Tremblay G F
Station de Recherches, Agriculture Canada, Lennoxville, Québec.
J Anim Sci. 1993 Jan;71(1):151-7. doi: 10.2527/1993.711151x.
Three groups of 34 gilts received, from 9 wk of age until slaughter at 7 wk of gestation, diets supplemented with either 0, 5, or 15 mg/kg of folic acid. The concentration of serum folates increased linearly (P < or = .05) with the level of added folic acid. Although the growth performance was not influenced by the treatments during the overall growing period, feed intake (P < or = .10) and body weight gain (P < or = .05) from 17 to 21 wk of age increased linearly as folic acid level in the diet increased. Age and body weight at puberty as well as body weight gain during gestation were not influenced (P > or = .32) by treatments. Dietary folic acid addition did not affect (P > or = .21) either total weight and empty weight of uterine horns or ovarian total weight, stroma weight, and number and weights of corpora lutea. No treatment effect (P > or = .35) was observed on placental surface, number of placental areolae, litter size, fetus weight, or total litter weight or on fetal DNA, RNA, and protein. However, the concentration of folates in fetuses increased linearly (P < or = .03) with the addition of folic acid in the dam's diet. In conclusion, although a dietary addition of as high as 15 mg/kg of folic acid seemed to influence growth performance of gilts by the end of the growing period, it did not affect age at puberty.(ABSTRACT TRUNCATED AT 250 WORDS)
三组共34头后备母猪，从9周龄开始直至妊娠7周时屠宰，分别采食添加了0、5或15毫克/千克叶酸的日粮。血清叶酸浓度随叶酸添加水平呈线性增加（P≤0.05）。虽然在整个生长阶段生长性能不受处理影响，但从17至21周龄，采食量（P≤0.10）和体重增加量（P≤0.05）随日粮中叶酸水平升高呈线性增加。初情期的年龄和体重以及妊娠期的体重增加不受处理影响（P≥0.32）。日粮添加叶酸对子宫角的总重量和空重量或卵巢总重量、间质重量以及黄体数量和重量均无影响（P≥0.21）。在胎盘表面、胎盘小叶数量、窝产仔数、胎儿体重、窝总重量或胎儿DNA、RNA和蛋白质方面未观察到处理效应（P≥0.35）。然而，随着母猪日粮中叶酸添加量增加，胎儿体内叶酸浓度呈线性增加（P≤0.03）。总之，虽然日粮中添加高达15毫克/千克叶酸在生长阶段末期似乎会影响后备母猪的生长性能，但对初情期年龄没有影响。（摘要截短为250字）
