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Salt Accumulation at the Soybean (Glycine Max. (L.) Merr.) Root-Soil Interface¹

ABSTRACT

Water soluble salts accumulated at the soybean (Glycine max L.) root-soil interface and in the rhizosphere soil when salts, dissolved in the soil solution, moved to the root surface at a greater rate than they were absorbed by the roots. Salt accumulation increased with increase of salt concentration in the soil solution and transpiration rate. The average salt accumulation decreased with increase in the average age of the roots.

¹ Journal Paper no. 3684, Purdue University Agr. Exp. Sta. Lafayette, Ind. Contribution from the Department of Agronomy. This study was supported in part by the Crops Research Division, ARS, USDA, under Cooperative Agreement number 12-14-100-8463 (34) with Purdue University.

² Research Associate and Professor of Agronomy, Purdue University, respectively.

Received for publication August 25, 1969. Accepted for publication November 14, 1969.