کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4427291 | 1309153 | 2007 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Derivation of ozone flux-yield relationships for lettuce: A key horticultural crop Derivation of ozone flux-yield relationships for lettuce: A key horticultural crop](/preview/png/4427291.png)
Ozone flux-response relationships were derived for lettuce, employing a multiplicative approach to model the manner in which stomatal conductance is influenced by key environmental variables, using a dataset collected during field experimentation in Crete and yield-response relationships derived from parallel open-top chamber experiments. Regional agronomic practices were adopted throughout. Computed versus measured data revealed that the derived model explained 51% (P < 0.001) of the observed variation in stomatal conductance. Concentration-based indices were compared with flux-based indices. Analyses revealed a significant relationship between accumulated stomatal ozone flux and yield employing flux threshold cut-offs up to 4 nmol m−2 s−1. Regressions employing very low or zero flux thresholds resulted in the strongest yield-flux relationships (explaining ≈80% (P < 0.05) of the variation in the dataset).
Journal: Environmental Pollution - Volume 146, Issue 3, April 2007, Pages 699–706