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Reduced ozone by air filtration consistently improved grain yield in wheat

Pleijel, Håkan LU (2011) In Environmental Pollution 159(4). p.897-902
Abstract
This study considered effects of reduced [O-3] on wheat yield. Open-top chamber charcoal filtered air treatments were compared with non-filtered treatments for field-grown wheat. 30 experiments meeting requirements were found, representing nine countries in North America, Europe and Asia. 26 experiments reported improved yield and 4 experiments reduced yield by filtration, a significant positive effect. Average yield improvement was 9%. Average daytime [O-3] was reduced by filtration from 35 to 13 nmol mol(-1). Filtration efficiency was 63% for O-3 and 56% for SO2. For NOx it was observed that NO2 was reduced and NO increased by filtration. Thus, filters convert NO2 to NO. Most experiments reported low or very low [SO2] and [NOx]. Thus,... (More)
This study considered effects of reduced [O-3] on wheat yield. Open-top chamber charcoal filtered air treatments were compared with non-filtered treatments for field-grown wheat. 30 experiments meeting requirements were found, representing nine countries in North America, Europe and Asia. 26 experiments reported improved yield and 4 experiments reduced yield by filtration, a significant positive effect. Average yield improvement was 9%. Average daytime [O-3] was reduced by filtration from 35 to 13 nmol mol(-1). Filtration efficiency was 63% for O-3 and 56% for SO2. For NOx it was observed that NO2 was reduced and NO increased by filtration. Thus, filters convert NO2 to NO. Most experiments reported low or very low [SO2] and [NOx]. Thus, O-3 can be concluded to be the main phytotoxic component in the experiments. Elevated [NO2] was observed in one experiment. The conclusion is that current [O-3] over large parts of the world adversely affect wheat yield. (C) 2010 Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Charcoal filter, Grain mass, Nitrogen dioxide, Nitric oxide, Ozone, Sulphur dioxide, Wheat, Yield
in
Environmental Pollution
volume
159
issue
4
pages
897 - 902
publisher
Elsevier
external identifiers
  • scopus:79951509554
ISSN
0269-7491
DOI
10.1016/j.envpol.2010.12.020
project
BECC
language
English
LU publication?
no
id
59c18fda-d9ca-4d57-b5e4-bdb969aeaaca (old id 4448667)
date added to LUP
2014-05-23 12:11:24
date last changed
2017-07-30 04:19:15
@article{59c18fda-d9ca-4d57-b5e4-bdb969aeaaca,
  abstract     = {This study considered effects of reduced [O-3] on wheat yield. Open-top chamber charcoal filtered air treatments were compared with non-filtered treatments for field-grown wheat. 30 experiments meeting requirements were found, representing nine countries in North America, Europe and Asia. 26 experiments reported improved yield and 4 experiments reduced yield by filtration, a significant positive effect. Average yield improvement was 9%. Average daytime [O-3] was reduced by filtration from 35 to 13 nmol mol(-1). Filtration efficiency was 63% for O-3 and 56% for SO2. For NOx it was observed that NO2 was reduced and NO increased by filtration. Thus, filters convert NO2 to NO. Most experiments reported low or very low [SO2] and [NOx]. Thus, O-3 can be concluded to be the main phytotoxic component in the experiments. Elevated [NO2] was observed in one experiment. The conclusion is that current [O-3] over large parts of the world adversely affect wheat yield. (C) 2010 Elsevier Ltd. All rights reserved.},
  author       = {Pleijel, Håkan},
  issn         = {0269-7491},
  keyword      = {Charcoal filter,Grain mass,Nitrogen dioxide,Nitric oxide,Ozone,Sulphur dioxide,Wheat,Yield},
  language     = {eng},
  number       = {4},
  pages        = {897--902},
  publisher    = {Elsevier},
  series       = {Environmental Pollution},
  title        = {Reduced ozone by air filtration consistently improved grain yield in wheat},
  url          = {http://dx.doi.org/10.1016/j.envpol.2010.12.020},
  volume       = {159},
  year         = {2011},
}