Journal
ENVIRONMENTAL POLLUTION
Volume 156, Issue 2, Pages 449-453Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2008.01.027
Keywords
Ozone; Exposure regimes; Oilseed rape; Yield; Biomass
Categories
Funding
- Ministry of Science and Technology of China [2002CB410803]
- National Nature Science foundation of China [30670387]
Ask authors/readers for more resources
Most available exposure-response relationships for assessing crop loss due to elevated ozone (O(3)) have been established using data from chamber and open-top chamber experiments. using a simulated constant O(3) concentration exposure (square wave), which is not consistent with the diurnal variation of O(3) concentration that occurs in nature. We investigated the response of oilseed rape (Brassica napus L.) to O(3) as affected by two exposure regimes: one with a diurnal variation (CF100D) and another with a constant concentration (CF100). Although the two exposure regimes have the same mean O(3) concentration and accumulated O(3) concentration above 40ppb (AOT40), our results show that O(3) in CF100D reduced biomass and number of pods/plant more than O(3) at CF100. Both O(3) exposures resulted in larger seed weights/100 pods compared to CF. Numbers of seeds/100 pods were reduced by CF100. While numbers of seeds/100 pods in the CF100D chamber were comparable to those in CF. Our results suggest that chamber experiments that use a constant O(3) exposure may understimate O(3) effects on biomass and yields. (C) 2008 Published by Elseiver Ltd.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available