Abstract

Collage of Agriculture University of Baghdad

Abstract
An experiment was carried out in the lath house, department of Horticulture, College of Agriculture, University of Baghdad, during 2006. This investigation aimed to study the effect of irrigation with saline water on leaf concentration of N, P, K, Ca, Mg, Fe, Mn, Na, and Cl of three Citrus species, sweet orange (Citrus sinensis), Lemon (Citrus limon) and Mandarin (Citrus reticulata) grafted on Sour orange (Citrus aurantium) root stock, Two levels of water salinity, 1.2 and 3.0 ds.m-1 Were uesd to irrigate 2 years old plants.
Results showed asignificant decrease in leaf N, K, Ca, Mg, and Fe Content as the trees irrgated with 3.0 ds.m-1 water, while the leaf Na and Cl Content increased significantly as it compered to the trees irrigated with 1.2 ds.m-1 water, except P and Mn which were significantly incresed with incresing water salinity.
The three species of the plants had significantly differance in leaf content as they irrgated with 3.0 ds.m-1 water. Sweet orange and Mandarin leaves had the optimum values of leaf Na and Cl Content, but lemon had the optimum values of leaf K and Fe content with significantly decreasing in Cl and Na concentrion as it compared with sweet orange and mandarin that irrigated with 3.0 ds.m-1.