Abstract
AbstractReported laboratory observations mention inhibiting effects of Al on uptake of cations. However, the diverse conditions of these experiments do not allow conclusions to be drawn about the extent of this inhibiting effect. An uptake model for Ca and Mg was therefore developed to study the interactions of Al and these cations. The model is based on surface complexation of the root surface with both specific adsorption reactions and exchange reactions included. Application of this model to experiments using a nutrient flux growth technique showed that the observed effects are well simulated. The behaviour of the model agreed with reported inhibiting effects of Al. The model showed that Al effects might be reversed by increased nutrient solution concentrations of cations. However, there exists a strong competitive interaction between Ca and Mg. Therefore, high Ca concentrations have a negative effect on the uptake of Mg. Plants with a high growth rate and a high shoot to root ratio appear to be more sensitive to Al effects than more slowly growing plants.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
