Wednesday, 9 November 2005
15

This presentation is part of: Soybean Management and Quality

Soybean Response to Irrigation with Saline Water.

Roberto Brevedan, María N. Fioretti, Sandra Baioni, and Iris R. Palomo.

The effect of irrigation with water at salinity concentrations of 1.5 and 3.0 dS m-1 on the response of soybean was studied during two seasons at the Lower Valley of the Colorado River (39°23'S 62°37'W), Argentina. These saline conditions reduced leaf water potential. Salinity had a negative effect on leaf development and there was a reduction in shoot dry weight. Plant roots were less sensitive to saline conditions than plant shoots. Root growth increased in the upper part of the soil (0 – 0.20 m). Nutrient composition of plant tissues was altered by salinity. Saline stress produced a significant increase in leaf sodium and chloride concentration but reduced the accumulation of potassium, calcium and magnesium. There was also a decrease in phosphorus concentration.

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