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Application of Biogas Digestate as a Nutrient Solution for the Hydroponic Culture of Chrysanthemum morifolium Ramat with Rockwool Substrate

  • Kenji Takemura
  • Ryosuke EndoEmail author
  • Toshio Shibuya
  • Yoshiaki Kitaya
Short Communication
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Abstract

The authors investigated whether biogas digestate could be used as a nutrient solution for rockwool culture. To do this, the authors examined growth performances of chrysanthemum cultured in rockwool and fed the filtrate of nitrified biogas digestate (f-NBD) derived from organic fraction of municipal solid waste and investigated whether application of the digestate caused nutrients to leach from the rockwool substrate. Plants that had been fed the f-NBD showed 33% lower fresh shoot weights and produced 35% fewer flowers than those that had been fed a commercial liquid fertilizer, whereas there were no significant differences in lengths of the shoots, chlorophyll contents of the leaves, numbers of days to first flowering, and maximum diameters of the flowers. Also, there were no significant differences in any of the growth parameters between plants that were cultured with the f-NBD supplemented with Mg and the commercial liquid fertilizer. These results indicate that the f-NBD could be used as a nutrient solution for chrysanthemum in rockwool culture if supplemented with Mg. In addition, a considerable amount of Fe was leached from the rockwool substrates following the application of the f-NBD, which could mitigate the expected Fe-deficiency symptoms in chrysanthemum.

Keywords

Fe leaching Methane fermentation Mg deficiency Nitrification Rockwool culture 

Abbreviations

f-NBD

Filtrate of nitrified biogas digestate

Mg-f-NBD

f-NBD supplemented with Mg to the same level as is found in the commercial liquid fertilizer OAT Agrio-A

Notes

Acknowledgements

The authors are grateful to Mitsuru Douzono, National Institute of Floricultural Science for supporting the cultivation of chrysanthemum, Teruo Wada, Osaka Prefecture University for supporting the rockwool culture of plants, and Takao Nakagiri and Shinji Sakurai, Osaka Prefecture University for supporting the measurement of culture solution components. This work was supported by the Industry-University-Government Cooperation Research Project of Osaka Prefecture University, and Japan Society for the Promotion of Science under Grant JP15K12246 and JP26520311.

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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Graduate School of Life and Environmental SciencesOsaka Prefecture UniversitySakai-shiJapan

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