Asian-Australasian Journal of Animal Sciences

  • 제23권2호
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  • Pages.279-286
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  • 2010
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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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Assessing Nitrogen and Phosphorus in Excreta from Grower-finisher Pigs Fed Prevalent Rations in Vietnam

  • Vu, T.K.V. (National Institute of Animal Husbandry) ;
  • Sommer, G.S. (University of Southern Denmark, Faculty of Engineering,Institute of Chemical Engineering, Biotechnology and Environmental Engineering) ;
  • Vu, C.C. (National Institute of Animal Husbandry) ;
  • Jorgensen, H. (University of Aarhus, Faculty of Agricultural Sciences, Department of Animal Health)
  • 투고 : 2009.06.20
  • 심사 : 2009.09.18
  • 발행 : 2010.02.01
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초록

Livestock production in Vietnam is, as in most Asian countries, increasing rapidly and changing into specialized highly intensified operations. The volume of animal excreta generated exceeds the capacity of the operation land base and cannot be utilized efficiently. As a consequence, there is a loss of plant nutrients from livestock farms that causes environmental pollution. This study carried out a feed and excretion experiment measuring fecal characteristic, daily fecal production, daily nitrogen and phosphorous excretion from grower-finisher pigs fed prevalent rations in Vietnam. Furthermore, equations for assessing the excretion were tested, which can be used in farm models for optimal recycling of manure while focusing on reducing pollution. The results indicated that fecal production and nutrient excretion were affected by the different rations tested. This study showed that five selected equations for predicting excretion from grower-finisher pigs in Danish conditions can also be used with precision in Vietnamese pig farming systems. The equations have been proven valid and can, therefore, be used as a much needed tool for assessing fecal production and nitrogen in excreta on pig farms. The study also showed that about 12% of nitrogen excreted was emitted during housing. Waste water contains more than half of the nitrogen excreted, mainly in ammonium form which has a high potential for gaseous emission.

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