Asian-Australasian Journal of Animal Sciences

  • 제30권11호
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  • Pages.1598-1604
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  • 2017
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  • 1011-2367(pISSN)
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  • 1976-5517(eISSN)
아세아태평양축산학회 (Asian Australasian Association of Animal Production Societies)
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Evaluation of high nutrient diets on litter performance of heat-stressed lactating sows

  • Choi, Yohan (Department of Animal Resources Science, College of Animal Life Sciences, Kangwon National University) ;
  • Hosseindoust, Abdolreza (Department of Animal Resources Science, College of Animal Life Sciences, Kangwon National University) ;
  • Shim, YoungHo ;
  • Kim, Minju (Department of Animal Resources Science, College of Animal Life Sciences, Kangwon National University) ;
  • Kumar, Alip (Department of Animal Resources Science, College of Animal Life Sciences, Kangwon National University) ;
  • Oh, Seungmin (Department of Animal Resources Science, College of Animal Life Sciences, Kangwon National University) ;
  • Kim, YoungHwa (Department of Animal Resources Development Swine Science Division, RDA) ;
  • Chae, Byung-Jo (Department of Animal Resources Science, College of Animal Life Sciences, Kangwon National University)
  • 투고 : 2017.05.23
  • 심사 : 2017.09.12
  • 발행 : 2017.11.01
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초록

Objective: The present study investigated the litter performance of multiparous sows fed 3% and 6% densified diets at farrowing to weaning during summer with mean maximum room temperature of $30.5^{\circ}C$. Methods: A total of 60 crossbred multiparous sows were allotted to one of three treatments based on body weight according to a completely randomized design. Three different nutrient levels based on NRC were applied as standard diet (ST; metabolizable energy, 3,300 kcal/kg), high nutrient level 1 (HE1; ST+3% higher energy and 16.59% protein) and high nutrient level 2 (HE2; ST+6% higher energy and 17.04% protein). Results: There was no variation in the body weight change. However, backfat thickness change tended to reduce in HE1 in comparison to ST treatment. Dietary treatments had no effects on feed intake, daily energy intake and weaning-to-estrus interval in lactating sows. Litter size, litter weight at weaning and average daily gain of piglets were significantly greater in sows in HE1 compared with ST, however, no difference was observed between HE2 and ST. Increasing the nutrient levels had no effects on the blood urea nitrogen, glucose, triglyceride, and creatinine at post-farrowing and weaning time. The concentration of follicle stimulating hormone, cortisol and insulin were not affected by dietary treatments either in post-farrowing or weaning time. The concentration of blood luteinizing hormone of sows in ST treatment was numerically less than sows in HE2 treatment at weaning. Milk and colostrum compositions such as protein, fat and lactose were not affected by the treatments. Conclusion: An energy level of 3,400 kcal/kg (14.23 MJ/kg) with 166 g/kg crude protein is suggested as the optimal level of dietary nutrients for heat stressed lactating sows with significant beneficial effects on litter size.

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참고문헌

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