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Göteborgs universitets publikationer

Reduced ozone by air filtration consistently improved grain yield in wheat

Författare och institution:
Håkan Pleijel (Institutionen för växt- och miljövetenskaper)
Publicerad i:
Environmental Pollution, 159 ( 4 ) s. 897-902
Artikel, refereegranskad vetenskaplig
Sammanfattning (abstract):
This study considered effects of reduced [O3] 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 [O3] was reduced by filtration from 35 to 13 nmol mol−1. Filtration efficiency was 63% for O3 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, O3 can be concluded to be the main phytotoxic component in the experiments. Elevated [NO2] was observed in one experiment. The conclusion is that current [O3] over large parts of the world adversely affect wheat yield.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Geovetenskap och miljövetenskap ->
Miljövetenskap ->
Geovetenskap och miljövetenskap ->
Meteorologi och atmosfärforskning
Biologiska vetenskaper ->
Ekologi ->
Terrestrisk ekologi
Charcoal filter; Grain mass; Nitrogen dioxide; Nitric oxide; Ozone; Sulphur dioxide; Wheat; Yield
Postens nummer:
Posten skapad:
2011-05-18 11:50

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