Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9488849 | Scientia Horticulturae | 2005 | 13 Pages |
Abstract
At high radiation levels, the diurnal canopy transpiration rate was four times higher than at low radiation levels and the night transpiration rate reached values between 120 and 200 g mâ2 dâ1 in both cases. The leaf transpiration rate decreased during crop ontogeny and was higher in the afternoon than in the morning for the same value of radiation, whereas a linear relationship with the VPD was found even for values greater than 3 kPa. The results showed that the fitted simplified Penman-Monteith formula accounted for more than 90% of the measured hourly canopy transpiration rate, signifying that this formula could be used to predict water requirements of crops under Mediterranean conditions and improve irrigation control in a substrate culture. However, the model coefficients will have to be adjusted for specific climate and crop conditions.
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Authors
Evangelina Medrano, Pilar Lorenzo, MarÃa Cruz Sánchez-Guerrero, Juan Ignacio Montero,