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Biogeosciences An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/bg-2017-358
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-2017-358
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: peer-reviewed comment 25 Aug 2017

Submitted as: peer-reviewed comment | 25 Aug 2017

Review status
This discussion paper is a preprint. It has been under review for the journal Biogeosciences (BG). A final paper in BG is not foreseen.

Comment on Growth responses of trees and understory plants to nitrogen fertilization in a subtropical forest in China by Tian et al. (2017)

Taiki Mori Taiki Mori
  • Kyoto University, Kitashirakawa, Sakyo-ku, Kyoto, Japan

Abstract. Negative effects of over-fertilization have been long reported in agricultural field, which is known as fertilizer burn. A recent paper by Tian et al. (2017) reported a result of simulated nitrogen (N) deposition experiment and demonstrated that application of NH4NO3 solution significantly reduced small trees, understory saplings, shrubs, seedlings, and ferns, while large trees were not affected by the application. They discussed that the result was due to the reduced light availability and intensified N saturation. I challenge this view, because it is more likely that the negative effects were caused by the monthly application of NH4NO3 solution with high concentration (as high as 0.4 M and 0.8 M). Since experiments using liquid NH4NO3 are common, careful interpretations are also required for other experiments.

Taiki Mori
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Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Interactive discussion
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Taiki Mori
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Short summary
Negative effects of over-fertilization have been long reported in agricultural field. A recent paper by Tian et al. (2017) reported that application of NH4NO3 solution significantly reduced understory vegetation. In this note, I suggest the possibility that the negative effects were caused by the monthly application of NH4NO3 solution with high concentration (as high as 0.4 M and 0.8 M).
Negative effects of over-fertilization have been long reported in agricultural field. A recent...
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