This experiment was conducted to study the effects of adding β-hydroxy-β-methylbutyrate (HMB) to sow diets on reproductive performance of sows and growth performance of piglets and their immune function. Twenty crossbred pregnant sows (Landrace×Large White) were randomly allotted by parity and expected delivery date into 2 groups with 10 replicates of 1 sow. Control group was fed a basal diet, and experimental group was fed the basal diet supplemented with 2 000 mg/kg HMB. The experiment was from day 74 of gestation to day 21 after parturition. The results showed that with addition of 2 000 mg/kg HMB to late gestation and lactation sow diets, compared with the control group, birth weight of piglets born alive was increased by 14.1% (P<0.05), litter body weight at 7 and 21 days of age was increased by 16.6% and 11.7% (P<0.05), and litter body weight gain from birth to 7 days of age and from birth to 21 days of age was increased by 28.3% and 12.5% (P<0.05). On day 98 of gestation and the day of parturition, compared with the control group, the serum immunoglobulin G (IgG) content of sows was increased by 35.3% (P<0.01) and 13.0% (P>0.05), and the serum immunoglobulin M (IgM) content was increased by 34.7% (P<0.05) and 12.6% (P>0.05). Compared with the control group, colostrum IgG content was increased by 19% (P<0.05), and milk IgM content on day 14 after parturition was increased by 21.4% (P<0.05). Compared with the control group, plasma IgG and IgM contents of piglets at 7 days of age were increased by 11.4% and 40.1% (P<0.05). It is concluded that 2 000 mg/kg HMB can enhance body weight at birth and body weight gain during suckling periods of piglets, and improve immune function of sows and their suckling piglets.
LI Yongming
,
XU Ziwei
,
LIU Jie
,
FENG Shanglian
. Effects of Adding β-Hydroxy-β-Methylbutyrate to Sow Diets on Reproductive Performance of Sows and Growth Performance of Piglets and Their Immune Function[J]. Chinese Journal of Animal Nutrition, 2012
, 24(9)
: 1745
-1753
.
DOI: 10.3969/j.issn.1006-267x.2012.09.018
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