Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 September 1968
Published in Agron J 60:554-557 (1968)
© 1968 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Nutrient Uptake by Lowland Under Flooded and Nonflooded Soil Conditions1

E. C. Cherian, Gary M. Paulsen and Larry S. Murphy2

Lowland rice (Oryzea sativa L.) produced more foliage and usually adsorbed more P and Mn from flooded soil than from nonflooded soil. Flooding, however, decreased the contents of Ca and Mg, and frequently the contents of K and Zn, in rice foliage. The responses of Fe and Cu contents of rice foliage to flooding varied.

Prosphorus fertilization increased the growth of rice and caused similar levels of phosphorus to accumulate in the foliage under flooded and nonflooded conditions. Super phosphate and liquid ammonium polyphosphate were more effective sources than solid ammonium polyphosphate under flooded conditions, but there was little difference among sources under nonflooded conditions. The highest P rate (100 ppm) produced most rice growth under flooded conditions while, under nonflooded conditions, the medium P rate (50 ppm) was as effective. Managanese fertilizer increased the Mn content of rice foliage only when applied at extremely high rates (50 ppm) and there was little difference between Mn contents of flooded and nonflooded plants at the higher Mn rates. Neither Mn nor Fe fertilizers affected rice growth.

Key Words: plant nutrition • fertilization • phosphorus source • nutrient content

1 Contribution No. 1030, Department of Agronomy, Kansas Agr. Exp. Station.

2 Graduate Research Assistant and Associate Professors of Agronomy, respectively, Department of Agronomy, Kansas State University, Manhattan 66502.

Received for publication April 6, 1968.




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Copyright © 1968 by the American Society of Agronomy.