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Published online 1 May 1977
Published in Agron J 69:410-414 (1977)
© 1977 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Fitting Plants Nutritionally to Soils. III. Sorghum1

J. C. Brown and W. E. Jones2

Fifteen sorghum (Sorghum bicolor (L.) Moench) lines, representing diverse germplasm currently used in crop breeding programs in the United States, were grown on the seven soils, used in part I of this study, to produce Fe, Zn, and Cu stresses or Al and Mn toxicities in soybeans. All 15 sorghum lines developed Fe and Zn deficiencies with symptoms ranging from some interveinal chlorosis to necrotic and twisted leaf tips. The sorghum lines responded differentially to Cu stress. When Cu was added to the soil, yields increased and P, Fe, and Zn concentration significantly decreased in the plant material.

The sorghum lines responded differentially to Al in Bladen soil. Five lines grew poorly and developed a chlorosis with some purple pigmentation; five lines were green and made good growth; and five lines were intermediate in their response. The chlorotic lines contained significantly less Fe and P than the green sorghum. On Richland soil (high Mn), yields were relatively good and the sorghum plants did not develop any persistent toxicity symptoms.

Care should be taken to select the sorghum line best adapted to Fe, Zn, or Cu stresses and to Al toxicity so that the plant and the soil may be compatible.

Key Words: Fe deficiency • Fe efficient • Mn toxicity • Mn tolerant • Zn stress • Cu stress • Al toxicity • Nutrient requirements of plants

1 Contribution of the ARS/USDA, Northeastern Region, Agric. Res. Ctr., Beltsville, MD 20705.

2 Soil scientist and agricultural research technician, ARS/USDA Plant Stress Laboratory, Beltsville, MD 20705.

Received for publication August 13, 1976.




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Environmental Quality		 The Plant Genome
Copyright © 1977 by the American Society of Agronomy.