Interactionship chloride-nitrate on nutrition of tomato plants

Abstract

Tomato plants vard "Marglobe" were cultivated in greenhouse by hydiuponic system in order to study the effect of five treatments of Cl-,0, 8,16,24 and 32 me.1-' with five different concentrations of NO- : 6, 12,18,24 and 30 me. 1-' . We found a cooperative effect of Cl- and NO3 increasing concentration of both until 24 me. 1-1 of Cl- and 18 me.1-' of NO3 which means an increase of NO3 in the nutrient solution thus decreasing the toxic effect of Cl- in plants. Org N/N03-N in the tissues is the index that best indicates its maximum growth, its value is considered to reach 1.0.