My Account: Log In | Join | Renew
Search
Author
Title
Vol.
Issue
Year
1st Page

Abstract

 

This article in AJ

  1. Vol. 68 No. 4, p. 680-682
     
    Received: Oct 14, 1975
    Published: July, 1976


 View
 Download
 Alerts
 Permissions
 Share

doi:10.2134/agronj1976.00021962006800040038x

Effect of Ammonium to Nitrate Ratio on Growth and Anthocyanin Development of Perennial Ryegrass Cultivars1

  1. L. W. Nittler and
  2. T. J. Kenny2

Abstract

Abstract

Improved methods of determining cultivar purity of perennial ryegrass, Lolium, perenne L., seed lots, are needed. We conducted studies to find characteristics in which cultivars might differ. Seedlings were grown in sand and were supplied with solutions in which O, 25, 50, 75, or 100% of the N was NH4 and the remainder was NO3. Growth and anthocyanin development were affected by ratio of ammonium to nitrate. Cultivars differed in both characteristics. Growth, as determined by tiller height, were greatest when plants were grown with 25% of the N as NH4. Anthocyanin development, as determined by percentage of the tiller height showing red color, was greatest when plants were grown with a solution in which 100% of the N was NH4. Cultivar differences in tiller height were greatest when plants were grown with 25% of the N as NH4. Cultivar differences in anthocyanin development were greatest when plants were grown with 75% of the N as NH4. With this solution, cultivars differed in percentage of plants in which red color extended the entire length of the tillers. Both anthocyanin development and tiller height were useful in determining cultivar purity of seed lots.

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

Copyright © .