Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Improving quality of common reed (Phragmites communis Trin.) silage with additives

  • Asano, Keigo (Department of Bioproduction Science, Faculty of Bioresouces and Environmental Science, Ishikawa Prefectural University) ;
  • Ishikawa, Takahiro (Department of Bioproduction Science, Faculty of Bioresouces and Environmental Science, Ishikawa Prefectural University) ;
  • Araie, Ayako (Department of Bioproduction Science, Faculty of Bioresouces and Environmental Science, Ishikawa Prefectural University) ;
  • Ishida, Motohiko (Department of Bioproduction Science, Faculty of Bioresouces and Environmental Science, Ishikawa Prefectural University)
  • Received : 2017.10.31
  • Accepted : 2018.04.02
  • Published : 2018.11.01
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Abstract

Objective: Common reed (Phragmites communis Trin.) could potentially provide an alternative resource for silage; however, its silage quality is poor. The aim of this study was to investigate the factors in reed that contribute to poor quality and determine how the use of additives at ensiling could improve fermentation quality. Methods: In Experiment 1, we determined the chemical composition and the presence of indigenous lactic acid bacteria (LAB) in reed. We further examined fermentation quality of reed silage under conditions without additives (NA) and treated glucose (G), lactic acid bacteria (L), and their combination (G+L). In Experiment 2, silage of NA, and with an addition of cellulase and lactic acid bacteria (CL) were prepared from harvested reed. The harvested reeds were fertilized at nitrogen concentrations of 0, 4, 8, and $12g\;N/m^2$ and were harvested thrice within one year. Results: The indigenous LAB and fermentable carbohydrates are at extremely low concentrations in reed. Reed silage, to which we added G+L, provided the highest quality silage among treatments in Experiment 1. In Experiment 2, N fertilization had no negative effect on silage quality of reed. The harvest times decreased fermentable carbohydrate content in reed. The CL treatment provided a higher lactic acid content compared to the NA treatment. However, the quality of CL treated silage at the second and third harvests was significantly lower than at the first harvest, due to a reduction in carbohydrates caused by frequent harvesting. Conclusion: The causes of poor quality in reed silage are its lack of indigenous LAB and fermentable carbohydrates and its high moisture content. In addition, reed managed by frequent harvesting reduces carbohydrate content. Although the silage quality could be improved by adding CL, higher-quality silage could be prepared by adding fermentable carbohydrates, such as glucose (rather than adding cellulases).

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References

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