Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 January 1978
Published in Agron J 70:17-20 (1978)
© 1978 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Aluminum Tolerance of Soybean Cultivars Based on Root Elongation in Solution Culture Compared with Growth in Acid Soil1

J. B. Sartain and E. J. Kamprath2

Growth of soybean [Glycine max (L.) Merr.] roots into acid subsoils and utilization of subsoil moisture is limited in many soils of the southeastern U. S. because of Al toxicity. Laboratory and greenhouse experiments were conducted to obtain information on tolerance of soybean cultivars which would be helpful in selection of cultivars best adapted to acid subsoils. Root elongation measurements were made of 18 cultivars exposed for 48 hours to solutions containing 0, 0.25, 0.50, and 1.0 ppm Al and 10 ppm Ca. Eleven of the cultivars were selected for a greenhouse experiment in which plants were grown in a Lynchburg soil (Aerie Paleaquult) at 81 and 4% Al saturation. Measurements were made of top growth, root length, and the Ca, P, and Al concentrations of the plant tissue. Of the 11 cultivars used, ‘Lee’, ‘Lee 68’, ‘York’, ‘Ogden’, and ‘Dare’ were judged to be relatively Al tolerant according to the short term root elongation studies. Based on absolute top growth in the 81% Al saturated soi1 or relative top growth in the 81% Al saturated soil as compared with the 4% Al saturated soil the cultivars Lee, ‘Bragg’, ‘Pickett 71’, and York were more tolerant of Al than the other cultivars.

Key Words: Mean relative extension rate • Root growth • Top growth • Al concentration

1 Paper No. 5274 of the Journal Series of the North Carolina Agric. Exp. Sin., Raleigh, N. C. This work was supported in part by a grant from the North Carolina Soybean Producers Assoc., Inc.

2 Former graduate student (now assistant professor of soil science, Univ. of Florida), and professor of soil science, North Carolina State Univ.

Received for publication May 25, 1977.




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The SCI Journals Crop Science Vadose Zone Journal
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1978 by the American Society of Agronomy.