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Published online 1 September 1972
Published in Agron J 64:581-583 (1972)
© 1972 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Effect of Soil pH on Element Concentration and Uptakeby Maize: I. P, K, Mg, and Na1

J. A. Lutz, Jr., C. F. Genter and G. W. Hawkins2

An understanding of soil-plant relationships, plant nutrition, and fertilization requires a knowledge of the variability of the chemical composition and uptake of elements by plants. The availability of certain elements is related to soil pH and since many of the soils of the southeastern U. S. are acid, particularly in the subsoil, additional information is needed on the effects of soil pH on the growth, chemical composition, and uptake of elements by maize (Zea mays L.).

Greenhouse experiments were conducted on Greendale silt loam to investigate the effects of three soil pH levels, 3.9, 5.1, and 6.1, on the yield and certain chemical characteristics of selected maize inbreds and single crosses. Adequate plant nutrients were applied to all pots and two rates of dolomitic limestone were applied to increase the pH. Plants were harvested 36 days after planting, dried, and later analyzed for P, K, Ca, Mg, and Na.

Highly significant differences in yields; P, K, Ca, and. Mg concentrations; and uptake among maize entries were observed. Response of entries at different pH levels was not consistent for either uptake or concentration of P, K, Ca, or Mg. There were no significant differences in Na concentrations among entries or pH levels.

Key Words: Zea mays L. • Element concentration • Element uptake

1 Contribution from the Department of Agronomy, Virginia Polytechnic Institute and State University, BIacksburg, Va. 24061.

2 Associate Professor and Professors of Agronomy, respectively.

Received for publication September 2, 1971.




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Copyright © 1972 by the American Society of Agronomy.