B

The degradation of soils by the salinity and sodicity has been an important subject in the handling and use of soils, and its reclamation contributes with the improvement of the productivity and sustainability of the environments. Studying the phytoremediation of salt- affected soils with Atriplex nummularia, this study aims to determine the extraction of salts by plants grown in saline-sodic soil under conditions of water stress. The experiment was conducted in a greenhouse for 134 days cultivating Atriplex nummularia in pots containing 20 kg of saline-sodic soil at four moisture levels (35, 55, 75 and 95 % of field capacity) , designed on blocks with eight replications, collecting plant and dividing it into leaf, stem and roots to determine the extraction of salts. The values of extraction of sodium by leaves + stem were 251.63, 277.84, 394,92 and 440,36 kg/ha 134 days-1 to 35, 55, 75 and 95 % of FC respectively. Removal of Ca, Mg, Na, K and Cl by leaf + stem were 644.25, 757.81, 1058.55 and 1182.00 kg/ha at 35; 55; 75 and 95 % of field capacity, making it an alternative for the phytoremediation of salt-affected soils in the semi-arid region of Brazil. Key Word