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Effect of salinity on water stress, growth, and yield of maize and sunflower |
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| Authors: | N Katerji JW van Hoorn A Hamdy F Karam M Mastrorilli |
| Institution: | a INRA, Station de Bioclimatologie, 78850, Thiveral-Grignon, France b Department of Water Resources, Agricultural University, Wageningen, Netherlands c Instituto Agronomico Mediterraneo, 70010 Valenzano, Bari, Italy d Instituto Sperimentale Agronomico, 70125, Bari, Italy |
| Abstract: | Maize and sunflower were grown in tanks filled with loam and clay, and were irrigated with water of three different levels of salinity. Predawn leaf-water potential and stomatal conductance were used as parameters for water stress. The predawn leaf-water potential of maize was higher than that of sunflower, but the effect of salinity and soil texture on the predawn leaf-water potential was the same for both crops. The stomatal conductance of sunflower was much higher and more severely affected by salinity and soil texture than the stomatal conductance of maize. Although salinity had a more serious effect on the development of leaf area and canopy dry matter of sunflower, its effect on evapotranspiration and grain yield was the same for both crops. Soil texture had a stronger effect on the development of leaf area and canopy dry matter of sunflower, which also appeared in the evapotranspiration and grain yield, indicating that sunflower is more sensitive to drought than maize. |
| Keywords: | Crop water stress Crop water use efficiency Leaf water potential Stomatal conductance Salt tolerance Maize Sunflower |
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