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. 2016 Feb 24;49:12. doi: 10.1186/s40659-016-0069-4

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© Chen et al. 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Diurnal variations of environmental photosynthetically active radiation (PAR) and ambient CO₂ concentration (Ca) (a); air temperature (Ta) and air relative humidity (RH) (b) from 09:00 to 19:00 on the measuring day