Physiological aspects and production of coriander using nutrient solutions prepared in different brackish waters

ABSTRACT The analysis of chlorophyll fluorescence is one many ways to quantify the salt damage photosynthetic performance and crop production. Thus, present study aimed evaluate photochemical efficiency production coriander, cultivar ‘Verdão’, as a function electrical conductivity levels nutrient solution cationic nature. experimental design was in randomized blocks, 4 × 3 factorial scheme, with four replicates. treatments consisted conductivities solutions (ECns = 1.6, 3.2, 4.8, 6.4 dS m-1) three kinds water different natures (Na+; Ca2+; Mg2+), which were prepared dissolution salts - NaCl, CaCl2.2H2O, MgCl2.6H2O supply (ECw 0.12 m-1), that is, predominant natures. carried out greenhouse between November December 2019 at Fertigation Salinity Laboratory Agricultural Engineering Department Universidade Federal Rural de Pernambuco. It found increase affected reaction centers, activity, carboxylation resulted reductions stomatal conductance, CO2 assimilation rate, therefore, biomass coriander. Different prevalence causes differences intensity damage, especially increasing concentration.