Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 November 1968
Published in Agron J 60:632-635 (1968)
© 1968 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Rhizome and Tiller Development of Kentucky Bluegrass (Poa pratensis L.) as Influenced by Photoperiod, Cold Treatment, and Variety1

L. E. Moser, S. R. Anderson and R. W. Miller2

Two controlled environment experiments were designed to study the effect of photoperiod and a cold treatment on rhizome and tiller development of ‘Merion’ and ‘Windsor’ Kentucky bluegrass (Poa pratensis L.) Evidence is given to support the following conclusions:

  1. A cold treatment is not essential for rhizome formation. Cold treatments increased tillering but reduced the number of rhizomes.
  2. Both initiation and elongation of rhizomes were favored by a 16- or 18-hour photoperiod when compared to a 8- or 12- hour photoperiod.
  3. Tillering showed little response to initial photoperiod, although more tillers were formed with a 12-hour than with an 8- or 18-hour photoperiod in one experiment.
  4. Windsor generally produced more and longer primary and secondary rhizomes than Merion but the latter tillered more profusely than Windsor.

Key Words: Kentucky bluegrass • photoperiod • rhizome • tiller • turf • Poa pratensis L. • day length • Merion • Windsor

1 Published with the permission of the Associate Director of the Ohio Agricultural Research and Development Center as Journal Article no. 18-68.

2 Formerly graduate student (now Assistant Professor), formerly Professor (now Dean of Agriculture, Texas A & I University, Kingsville), and Associate Professor, respectively, Department of Agronomy, The Ohio State University, Columbus 43210 and Ohio Agricultural Research and Development Center, Wooster.

Received for publication March 29, 1968.




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Copyright © 1968 by the American Society of Agronomy.