SODIUM RELATIONS IN DESERT PLANTS

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Abstract
Atriplex canescens (Pursh) Nutt. ssp. canescens (Calligonum c. Pursh.) and Atriplex polycarpa (Torr.) Wats. (Obione p. Torr.) plants were grown in Yolo loam soil in a glasshouse with different levels of sodium salts. Both species tolerated concentrations of salt equivalent to seawater, using either NaCl or Na2SO4. Vegetative yields were slightly higher with chloride, particularly with stems of A. polycarpa; SO42- decreased calcium and magnesium concentrations. Atriplex canescens leaves contained less Na, total cations, Cl, S, and Si, but more N than did those of A. polycarpa. The A. polycarpa would have high concentrations or organic acids in leaves. Chloride decreased N concentrations in leaves of A. polycarpa. Atriplex canescens (Pursh) Nutt. ssp. canescens (Calligonum c. Pursh.) and Atriplex polycarpa (Torr.) Wats. (Obione p. Torr.) plants were grown in Yolo loam soil in a glasshouse with different levels of sodium salts. Both species tolerated concentrations of salt equivalent to seawater, using either NaCl or Na2SO4. Vegetative yields were slightly higher with chloride, particularly with stems of A. polycarpa; SO42- decreased calcium and magnesium concentrations. Atriplex canescens leaves contained less Na, total cations, Cl, S, and Si, but more N than did those of A. polycarpa. The A. polycarpa would have high concentrations or organic acids in leaves. Chloride decreased N concentrations in leaves of A. polycarpa. © Williams & Wilkins 1982. All Rights Reserved.

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