J. Anim Sci.
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Journal of Animal Science, Vol 71, Issue 1 151-157, Copyright © 1993 by American Society of Animal Science

JOURNAL ARTICLE

Effect of long-term addition of folic acid on folate status, growth performance, puberty attainment, and reproductive capacity of gilts

J. J. Matte, C. L. Girard and G. F. Tremblay
Station de Recherches, Agriculture Canada, Lennoxville, Quebec.

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)


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Copyright © 1993 by the American Society of Animal Science.