Effects of Dietary Valine/Lysine on Reproductive Performance and Serum Biochemical Indices of Gilts

LI Fangfang; WANG Jun; LIN Yan; DENG Hong; WU De

doi:10.3969/j.issn.1006-267x.2013.04.008

Chinese Journal of Animal Nutrition >

2013 , Vol. 25 >Issue 4: 720 - 728

DOI: https://doi.org/10.3969/j.issn.1006-267x.2013.04.008

Swine Nutrition

Effects of Dietary Valine/Lysine on Reproductive Performance and Serum Biochemical Indices of Gilts

LI Fangfang ,
WANG Jun ,
LIN Yan ,
DENG Hong ,
WU De

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Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an 625014, China

Received date: 2012-10-08

Online published: 2013-03-25

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Abstract

Eighty crossbred gilts were used to investigate the effects of different valine/lysine (Val/Lys) on the gilts' reproductive performance and serum biochemical indices. According to Val/Lys, the gilts were randomly allocated to 4 groups [75% group (75/100), 90% group (90/100), 105% group (105/100) and 120% group (120/100)] with 20 replicates in each group and 1 pig per replicate. The experiment period was from the day 90 of pregnancy to estrus again. The results showed as follows: the average daily feed intake of gilts during whole lactation period in 120% group was significantly higher than that in 75% group (P<0.01) and 90% group (P<0.05). There were no significant differences in the number of piglets born alive per litter, the number of healthy piglets per litter, birth weight of piglets per litter and birth weight of piglet (P>0.05). The body weight of piglets weaned at 21 days of age was gradually increased with elevating Val/Lys, and 120% group was significantly higher than 75% group (P<0.05). On day 21 after parturition, back fat thickness in 120% group was significantly lower than that in 75% group (P<0.01), and back fat loss was significantly higher than that in 75% group (P<0.01). On day 14 after parturition, serum total protein content of gilts in 120% group was significantly higher than that in 75% and 90% groups (P<0.05). Serum urea nitrogen content of gilts in 120% and 105% groups was significantly lower than that in 75% and 90% groups (P<0.05). Serum glucose content of gilts in 75% group was significantly higher than that in the other groups (P<0.05), and with increasing levels of Val/Lys, a decreasing trend was observed. The contents of milk fat, solid(s)-non-fat and milk protein content in colostrums and milk on day 14 in 120% group were significantly higher than those in 75% and 90% groups (P<0.05). It is concluded that dietary Val significantly improves average daily feed intake of gilts, and Val/Lys of 120% is the best for average daily feed intake of gilts and performance of piglets in this study, but Val has no effect on interval days from weaning to estrus.

Key words： Val/Lys; gilts; reproductive performance

Cite this article

LI Fangfang , WANG Jun , LIN Yan , DENG Hong , WU De . Effects of Dietary Valine/Lysine on Reproductive Performance and Serum Biochemical Indices of Gilts[J]. Chinese Journal of Animal Nutrition, 2013 , 25(4) : 720 -728 . DOI: 10.3969/j.issn.1006-267x.2013.04.008

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