This study was conducted to investigate the effects of L-arginine (L-Arg) with different levels on the reproductive performance and plasma nitric oxide (NO) related indexes of pregnant sows. A total of 36 Yorkshire ? Landrace sows (2 parities) were selected and randomly assigned into 4 groups with 9 sows in each group, and sows were fed based diets added with 0 L-Arg+1.7% L-Ala (0 L-Arg group), 0.4% L-Arg+1.02% L-Ala (0.4% L-Arg group) , 0.7% L-Arg+0.51% L-Ala (0.7% L-Arg group) and 1.0% L-Arg+0 L-Ala (1.0% L-Arg group), respectively, adding L-Ala to meet nitrogen balance.The experiment period was conducted from mating to farrowing. The results showed as follows:compared with the 0 L-Arg group, the number of piglets born alive and litter birth weight of all piglets in 1.0% L-Arg group were increased significantly (P<0.05), and with the increasing of L-Arg levels in diet, total piglets born per litter and birth weight of piglet had a tendency to rise (P>0.05). The Arg and ornithine contents of gestation sows in plasma on days 30, 60 and 90 in 1.0% L-Arg group were significantly or extremely significantly higher than those in 0.7%, 0.4% and 0 L-Arg groups (P<0.05 or P<0.01). The proline content of gestation sows in plasma on day 90 in the four groups were extremely significantly different (P<0.01), but those of gestation sows in plasma on days 30 and 60 were not significantly different (P>0.05). The NO content of gestation sows on days 30, 60 and 90 and the activities of total nitric oxide synthase (TNOS) and inducible nitric oxide synthase (iNOS) of gestation sows on day 90 in plasma in 1.0% L-Arg group were significantly or extremely significantly higher than those in 0.7%, 0.4% and 0 L-Arg groups (P<0.05 or P<0.01). Regression analysis showed that the total piglets born per litter, number of piglets born alive per litter, litter birth weight of all piglets born alive and contents of amino acids, NO and activities of TNOS and iNOS in plasma had significant or extremely significant linear relationship with dietary L-Arg level. In conclusion, it has obvious effects by changing the levels of dietary L-Arg on blood biochemical indexes of the late gestation, and it has the best effects on improving reproductive performance by adding 1.0% L-Arg in sow diets.
YANG Hui
,
LIN Dengfeng
,
WANG Tian
,
LIN Boquan
,
LI Helai
. Effects of Different Levels of Dietary L-Arg on Reproductive Performance and Blood Biochemical Indexes of Pregnant Sows[J]. Chinese Journal of Animal Nutrition, 2012
, 24(10)
: 2013
-2020
.
DOI: 10.3969/j.issn.1006-267x.2012.10.022
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