Effects of various NaCl levels on shoot content of macro elements, in seedlings of five citrus species namely:Bakraei (Citrus reticulata X C. limetta), Volkamer lemon (C. volkameriana), Sour orange (C. aurantium), Sweet lime (C. limetta) and Mexican lime (C. aurantifolia), were studied in a glasshouse, using a randomized complete block design with factorial arrangement of four replications. one-year old seedlings of each species were grown in pots, containing calcareous native soil (pH=8.2) . They were then irrigated with water supplemented with 0 (control), 20, 40 and 60 mM NaCl. At the end of the experiment (90 days later) the amount in shoots of N, P, K, Ca, Mg, and Na were determined. The amount varied among species, even in control plants. Salinity had different effects on shoot content of macro elements. Salinity reduced N, Ca and Mg content (in shoot) all species. It also reduced the amount of P in shoots of all species, except for Mexican lime. Na content increased in shoot for all species. The amount of K in shoot of all species decreased whit increase in salinity level, except for sour orange, in which it tended to increase.
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