Responses of alfalfa to potassium, calcium and nitrogen under stress induced by sodium chloride
1998
Khan, M.G. | Silberbush, M. | Lips, S.H. (The Jacob Blaustein Inst., Sede Boqer Campus (Israel). Biostress Research Lab.)
The physiological responses of alfalfa (Medicago sativa) to salinity (100 mM NaCl) and some inorganic nutrients (K+, Ca2+ and N as NO3-) were investigated. Salinity caused a substantial reduction in biomass, carbon assimilation rate, stomatal conductance, water use efficiency, leaf area, relative growth rate, NO3- content and nitrate reductase activity, whereas, transpiration rate was slightly affected. Inclusion of K+, Ca2+ and N as NO3- in plant nutrient medium in combination or alone brought about a marked stimulation in control plants moderated the salinity and caused reductions in NaCl treated plants. In addition, plants also exhibited differences in these parameters at two growth stages.
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