Modeling Canola Response to Salinity on Vegetative Growth Stages

Document Type : Research Paper

Abstract

The sensitivity of plants to salinity varies during growth season. Most plants are resistant at the germination stage, but at the seedling or earlier growth stages become more sensitive to salinity. Their tolerance usually increases with age. The salt tolerance of different plants has been extensively studied; however, the results have either been qualitative or expressed as average values of root zone salinity for the whole growth season. Thus, developing appropriate models for quantitative characterization of plant response to salinity at different growth stages is essential. Consequently, canola, a plant of high economic value, was selected for this study. Three vegetative stages for canola (seedling, rosette, bud) are recognized. A greenhouse study was conducted in a natural saline loamy sand soil, using salinity treatments comprising one
non-saline water (tap water) and eight natural saline waters of 3-17 dS.m^-1.Canola plants were irrigated with tap water before the desired stage and then the salinity treatments were applied. Maas and Hoffman (1977), van Genuchten and Hoffman (1984), Dirksen et al., (1993), and Homaee et al., (2002b) models were used to predict relative seedling number and relative transpiration (T_a/T_p). To compare the models and their efficiency, the maximum error, root mean square error, coefficient of determination, modeling efficiency and coefficient of residual Maas were calculated. Results indicate that the Maas and Hoffman (1977) model provides a reasonable prediction at the seedling stage while the Homaee et al. (2002b) model provides better predictions at the rosette and bud growth stages.

Keywords

20.1001.1.26454531.1386.8.4.7.1

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Food Engineering Research

Modeling Canola Response to Salinity on Vegetative Growth Stages

References

References

Volume 8, Issue 4 - Serial Number 4
January 0
Pages 95-112

Modeling Canola Response to Salinity on Vegetative Growth Stages

References

References

Volume 8, Issue 4 - Serial Number 4January 0Pages 95-112

Volume 8, Issue 4 - Serial Number 4
January 0
Pages 95-112