Dietary Supplementation with 0.8% L-Arginine between Days 0 and 25 of Gestation Reduces Litter Size in Gilts  

Oleh:

Xilong, Li ; Bazer, Fuller W. ; Johnson, Gregory A. ; Burghardt, Robert C.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: JN: The Journal of Nutrition vol. 140 no. 06 (Jun. 2010), page 1111-1116.
Topik: DIETARY SUPPLEMENTATION; L-ARGININE

Ketersediaan

Perpustakaan FK Nomor Panggil: J42.K.2010.02 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

In this study, we determined the effects of L-arginine supplementation during early pregnancy on embryonic/fetal survival and growth in gilts. Gilts were housed individually in pens and fed twice daily 1 kg of a corn- and soybean meal-based diet supplemented with 0.0, 0.4, or 0.8% L-arginine (wt:wt) between d 0 and 25 of gestation (10 gilts/treatment). The diets were made isonitrogenous by addition of appropriate amounts of L-alanine. At d 25 of gestation, gilts were fed L-alanine or L-arginine and hysterectomized 30 min later to obtain uteri and conceptuses (embryos and associated fetal membranes and fluids). Dietary supplementation with 0.4 or 0.8% L-arginine enhanced (P < 0.05) its concentrations in maternal plasma (64 and 98%, respectively) as well as the vascularity of chorionic and allantoic membranes, compared with the control group. Reproductive performance [numbers of corpora lutea (CL) and fetuses, placental and fetal weights, and embryonic mortality] did not differ between the 0.4% Arg and control groups. However, supplementation with 0.8% L-arginine decreased (P < 0.05) uterine weight (–20%), total number of fetuses (–24%), CL number (–17%), total fetal weight (–34%), total volume of allantoic and amniotic fluids (–34 to 42%), concentrations of progesterone in maternal plasma (–33%), as well as total amounts of progesterone (–35%), estrone (–40%), and estrone sulfate (–37%) in allantoic fluid, compared with the control group. These results indicate that dietary supplementation with 0.8% L-arginine between d 0 and 25 of gestation, while increasing placental vascularity, adversely affects the reproductive performance of gilts.

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