Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Influence of microbial additive on microbial populations, ensiling characteristics, and spoilage loss of delayed sealing silage of Napier grass

  • Cai, Yimin (Japan International Research Center for Agricultural Sciences (JIRCAS)) ;
  • Du, Zhumei (Department of Grassland Science, China Agricultural University) ;
  • Yamasaki, Seishi (Japan International Research Center for Agricultural Sciences (JIRCAS)) ;
  • Nguluve, Damiao (Agricultural Research Institute of Mozambique) ;
  • Tinga, Benedito (Agricultural Research Institute of Mozambique) ;
  • Macome, Felicidade (Agricultural Research Institute of Mozambique) ;
  • Oya, Tetsuji (Japan International Research Center for Agricultural Sciences (JIRCAS))
  • Received : 2019.06.06
  • Accepted : 2019.08.19
  • Published : 2020.07.01
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Abstract

Objective: To measure whether a microbial additive could effectively improve the fermentation quality of delayed-sealing (DS) silage, we studied the effects of inoculants of lactic acid bacteria (LAB) and cellulase enzyme on microbial populations, ensiling characteristics, and spoilage loss of DS silage of Napier grass in Africa. Methods: Quick-sealing (QS) and DS silages were prepared with and without LAB (Lactobacillus plantarum) inoculant, cellulase enzymes, and their combination. The QS material was directly chopped and packed into a bunker silo. The DS material was packed into the silo with a delay of 24 h from harvest. Results: In the QS silage, LAB was dominant in the microbial population and produced large amounts of lactic acid. When the silage was treated with LAB and cellulase, the fermentation quality was improved. In the DS silage, aerobic bacteria and yeasts were the dominant microbes and all the silages were of poor quality. The yeast and mold counts in the DS silage were high, and they increased rapidly during aerobic exposure. As a result, the DS silages spoiled faster than the QS silages upon aerobic exposure. Conclusion: DS results in poor silage fermentation and aerobic deterioration. The microbial additive improved QS silage fermentation but was not effective for DS silage.

Keywords

References

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