About Us | Help Videos | Contact Us | Subscriptions
 

Abstract

 

This article in AJ

  1. Vol. 62 No. 4, p. 474-477
     
    Received: Oct 30, 1969


 View
 Download
 Alerts
 Permissions
Request Permissions
 Share

doi:10.2134/agronj1970.00021962006200040012x

Effect of Potassium on the Mineral Constituents of Pearl Millet and Sudangrass1

  1. B. A. Schneider and
  2. N. A. Clark2

Abstract

Abstract

The effect of K at O and 672 kg/ha and various combinations of Ca, Mg, and K on the nitrate-N content of pearl millet [Pennisetum typhoides (Burm.) Staph and Hubbard] and sudangrass [Sorghum sudanense (Piper) Staph] was studied. Nitrogen and P were added uniformly on all plots. Pearl millet growth was unaffected by the K treatment in Experiment I, but this treatment increased sudangrass growth. There was no significant growth response to fertility in Experiment II, however, the Ca + Mg + K treatment tended to have the tallest plants. The fertility treatments did not significantly affect the P content of pearl millet. Pearl millet accumulated much higher amounts of nitrate N than did sudangrass. All plots receiving K singly, or in combination with Ca, and/or Mg were significantly higher in nitrate N. Nitrate N was significantly decreased by addition of Mg and by Ca, but to a lesser degree. Drought conditions seemed to intensify the influence of K on increasing forage nitrate N concentrations. Regulation of Mg and K fertility may help lessen the possibility of nitrate toxicity in pearl millet and sudangrass.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © .