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This article in AJ

  1. Vol. 59 No. 4, p. 332-334
     
    Received: Nov 23, 1966
    Published: July, 1967


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doi:10.2134/agronj1967.00021962005900040014x

Nitrogen and Sugar Levels of Pith Tissue in Corn as Influenced by Plant Age and by Potassium and Chloride Ion Fertilization1

  1. J. W. Martens2 and
  2. D. C. Arny3

Abstract

Abstract

Organic nitrogen and sugar levels in the second internode pith tissue of three corn (Zea mays L.) lines, with three fertilizer treatments, were determined over a period of 9 weeks, beginning shortly before silking. Nitrogen levels were highest at 11 weeks after planting, or about silking time, and then declined. Total and reducing sugars in the pith tissue increased up to 13 to 15 weeks and then declined. The application of 168 kg/ha (150 lb/acre) of potassium as KCl significantly increased organic nitrogen levels in two of the three lines under study. Reducing sugars were sharply decreased in all corn lines by the KCl treatment. The application of 157 kg/ha (140 lb/acre) of chloride ion as NHiCl (without K+) significantly decreased reducing sugar levels in one corn line and, in general, had effects similar to, but smaller than, the KCl treatment

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