Asian-Australasian Journal of Animal Sciences

  • 제30권6호
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  • Pages.804-810
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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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Effects of sodium diacetate on the fermentation profile, chemical composition and aerobic stability of alfalfa silage

  • Yuan, XianJun (Institute of Ensiling and Processing of Grass, Nanjing Agricultural University) ;
  • Wen, AiYou (Institute of Ensiling and Processing of Grass, Nanjing Agricultural University) ;
  • Desta, Seare T. (Institute of Ensiling and Processing of Grass, Nanjing Agricultural University) ;
  • Wang, Jian (Institute of Ensiling and Processing of Grass, Nanjing Agricultural University) ;
  • Shao, Tao (Institute of Ensiling and Processing of Grass, Nanjing Agricultural University)
  • 투고 : 2016.10.09
  • 심사 : 2016.12.17
  • 발행 : 2017.06.01
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초록

Objective: The objective of this study was to evaluate the effect of sodium diacetate (SDA) on fermentation profile, chemical composition and aerobic stability of alfalfa (Medicago sativa L.) silage. Methods: Fresh alfalfa was ensiled with various concentrations of SDA (0, 3, 5, 7, and 9 g/kg of fresh forage). After 60 days of the ensiling, the samples were collected to examine the fermentative quality, chemical composition and aerobic stability. Results: The application of SDA significantly (p<0.05) decreased silage pH with the lowest value in silage with 7 g/kg of SDA. The proliferations of enterobacteria, yeasts, molds and clostridia were inhibited by SDA, resulted in lower ethanol, propionic and butyric acid concentrations and dry matter loss in SDA treated silages than control. The increasing SDA linearly decreased free amino acid N (p<0.001), ammonia N (p = 0.018) and non-protein N (p<0.001), while linearly increased water soluble carbohydrate (p<0.001) and peptide N (p<0.001). It is speculated that SDA accelerated the shift from homofermentative to heterofermentative lactic acid bacteria during the silage fermentation, indicated by lower lactic acid production in SDA-9 than SDA-7 silages after 60 days of ensiling. Alfalfa silages treated with SDA at 7 g/kg had highest Flieg's point and remained stable more than 9 d during aerobic exposure under humid and hot conditions in southern China. Conclusion: SDA may be used as an additive for alfalfa silages at a level of 7 g/kg.

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참고문헌

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