Generation of nitrogen oxide pollutants during C02enrichment of glasshouse atmospheres
- 1 January 1975
- journal article
- research article
- Published by Taylor & Francis in Journal of Horticultural Science
- Vol. 50 (3) , 233-238
- https://doi.org/10.1080/00221589.1975.11514628
Abstract
Summary The propane and kerosene burners used in glasshouses to provide an enriched CO2 content of the atmosphere generate nitrogen oxides by heat-induced combination of atmospheric N2 and O2. Concentrations of 30–40 pphm† of nitric oxide, and about 10 pphm of nitrogen dioxide, were detected. Nitrogen oxides have recently been recognized as pollutants which can damage plants in pphm concentrations, especially in the presence of sulphur dioxide. The concentrations detected here are just below the threshold expected to cause damage if species of NOx were the only pollutants, but in the presence of small amounts of SO2 some foliar lesions might be expected.Keywords
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