Response of Salt‐Stressed Strawberry Plants to Supplementary Calcium Nitrate and/or Potassium Nitrate

Abstract

A pot experiment was carried out with two strawberry (Fragaria × ananassa Duch) cultivars, Oso Grande and Camarosa in sand culture to investigate the effects of supplementary calcium and potassium nitrate to plants grown at high NaCl (35 mM) in complete nutrient solution supplied via roots. Treatments were (1) nutrient solution alone (C), (2) C + 5 mM Ca(NO3)2 + 5 mM KNO3 (C + CaN + KN), (3) nutrient solution + 35 mM NaCl (C + S), (4) C + S + 5 mM Ca(NO3)2 (C + S + CaN), (5) C + S + 5 mM KNO3 (C + S + KN), and (6) C + S + 5 mM Ca(NO3)2 + 5 mM KNO3 (C + S + CAN + KN). The plants grown at high NaCl had less dry matter, fruit yield, and chlorophyll content than those grown in normal nutrient solution for both cultivars. Both supplementary Ca(NO3)2 and KNO3 treatments significantly ameliorated the negative effects of salinity on plant growth and fruit yield. Treatment 4 (C + S + CaN) was slightly more effective in mitigating salt stress than treatment 5 (C + S + KN). However, neither of these was as ...