論文

2016年3月

N2O emission from a tomato rockwool culture is highly responsive to photoirradiation conditions

SCIENTIA HORTICULTURAE
  • Toshihiro Yoshihara
  • ,
  • Akio Tokura
  • ,
  • Shin-nosuke Hashida
  • ,
  • Kazuyoshi Kitazaki
  • ,
  • Masaki Asobe
  • ,
  • Koji Enbutsu
  • ,
  • Hirokazu Takenouchi
  • ,
  • Fumiyuki Goto
  • ,
  • Kazuhiro Shoji

201
開始ページ
318
終了ページ
328
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.scienta.2016.02.014
出版者・発行元
ELSEVIER SCIENCE BV

Previously, we found that rhizospheric N2O emissions from a tomato rockwool culture respond quickly and directly to nitrogen fertilization. Interestingly, the amount of emissions increased considerably when fertilization was shifted from day-time to night-time. If this phenomenon is revealed in response to photoirradiation, the N2O emissions would be hypothesized as a matter of not only a bacterial activity, but also an ecophysiological status of tomato plants. Therefore, we observe the effects of detailed photoirradiation conditions on N2O emissions to confirm the hypothesis. Tomato was grown by a rockwool culture with constant intermittent fertilization. The N2O emissions were observed continuously using an automatic monitor to relate them to photoirradiation intensity during the day-time fertilization and to detect any effect of supplemental lighting on N2O emissions during the night-time fertilization. The daily total N2O emissions was negatively correlated with daily total solar radiation (r = -0.83). It was obvious that more than 15 J m(-2) s(-1) of photon flux density (PFD) were almost evenly effective in suppressing emissions. Supplemental lighting during night-time fertilization confirmed the negative effects of photoirradiation on N2O emissions, which were revealed as a significant PFD/irradiation style dependency and a wavelength dependency. Notably, the supplemental lighting advanced the reduction of water content and electric conductivity in the rockwool. The clear negative correlation between N2O emissions and photoirradiation could be the result of the acceleration of water and/or nutrient uptake via tomato roots and a counter-result of the deceleration of bacterial N consumption by photoirradiation. (C) 2016 Elsevier B.V. All rights reserved.

Web of Science ® 被引用回数 : 1

リンク情報
DOI
https://doi.org/10.1016/j.scienta.2016.02.014
Scopus
https://www.scopus.com/record/display.uri?eid=2-s2.0-84957927244&origin=inward
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000373539300039&DestApp=WOS_CPL
URL
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84957927244&origin=inward

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