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http://dx.doi.org/10.12749/RDB.2013.37.3.117

Effects of the Dietary Supplementation of Pelletted-Italian Ryegrass on Reproductive Performance in Pregnant Sows  

Kim, Ki Hyun (National Institute of Animal Science, Rural Development Administration)
Kim, Kwang Sik (National Institute of Animal Science, Rural Development Administration)
Kim, Jo Eun (National Institute of Animal Science, Rural Development Administration)
Jung, Hyun Jung (Technology Cooperation Bureau, Rural Development Administration)
Lee, Sung Dae (Research Policy Bureau, Rural Development Administration)
Sa, Soo Jin (National Institute of Animal Science, Rural Development Administration)
Hong, Joon Ki (National Institute of Animal Science, Rural Development Administration)
Park, Jun Cheol (National Institute of Animal Science, Rural Development Administration)
Kim, Young Hwa (National Institute of Animal Science, Rural Development Administration)
Publication Information
Reproductive and Developmental Biology / v.37, no.3, 2013 , pp. 117-122 More about this Journal
Abstract
The aim of this study was to investigate the effects of dietary supplementation of pelleted-Italian Ryegrass (IRG) as a source of fiber on reproduction performance in pregnant sows. A total of 24 pregnant sows were randomly assigned to four dietary treatments, which was given a corn-soybean diet with 0%, 10%, 20%, and 30% pelleted-IRG from 105 days prepartum to 7 days postpartum. During experimental period, the sows fed the IRG supplemented diet showed the lower feed intake than the sows fed the control diet (p<0.05). The changes of body weight in sows from initial to pre- and/or post-partum was significantly smaller in sows fed the IRG supplemented diet than control group. It is thought that the lower weight gain in IRG supplemented groups is caused by low feed intake. Although there was no significant difference, sows fed the IRG supplemented diet tended to increase the litter size and birth weight in piglets compared with sows fed the control diet. This result suggests that the dietary supplementation of IRG has the positive effects to improve the reproductive performance in sows. But, the excessive feeding of IRG to sows might cause to retard the days of return to estrus, and decrease the contents of solid, milk protein, and milk fat in colostrum. Thus, the addition of about 10% IRG is desirable to increase the reproductive performance. Meanwhile, the feeding energy diet is better effective than feeding the fiber diets to improve overall productivity in sows after postpartum.
Keywords
Italian ryegrass; Fiber diet; Reproductive; Litter size; Swine;
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