HIGHLIGHTS:
The cationic nature has no effect on the water consumption of coriander grown under nutrient solution with high salinity.
The use of waters with prevalence of Mg2+ result in greater leaf area in coriander.
The production and water relations of coriander decrease when grown on brackish water.
ABSTRACT
The use of brackish water for preparation of nutrient solutions has several impacts on crop performance, depending on the water concentration and cation prevalence. Therefore, this study was conducted to evaluate production and water relations of coriander grown on nutrient solutions prepared with brackish waters with different cationic natures under hydroponic conditions. A randomized block experimental design with four replicates was used, in a 4 × 3 factorial arrangement. The treatments consisted of four electrical conductivities of the nutrient solution (1.6, 3.2, 4.8, and 6.4 dS m-1) which were prepared in waters with different salts (NaCl, CaCl2.2H2O, and MgCl2.6H2O). Salinity negatively affected the production and water relations of coriander grown in hydroponic system; plants grown on nutritive solutions with predominance of Na+ had higher total dry weight and shoot dry weights, as well as higher stomatal conductance. The largest leaf area was found when using the nutrient solution with predominance of Mg2+.
Key words:
Coriandrum sativum L.; soilless cultivation; salinity
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Tmin - Minimum air temperature; Tmax - Maximum air temperature; Tmea - Mean air temperature; RHAmin - Minimum relative air humidity; RHAmax - Maximum relative air humidity; RHAmea - Mean relative air humidity
Vertical bars represent the standard error of the mean (n = 4). Different letters indicate significant differences between cationic natures of salts by the Tukey’s test (p ≤ 0.05)
Vertical bars represent the standard error of the mean (n = 4). Different letters indicate significant differences between cationic natures of the salts by the Tukey’s test (p ≤ 0.05)