Rhizome and Tiller Development of Kentucky Bluegrass (Poa pratensis L.) as Influenced by Photoperiod, Cold Treatment, and Variety
- L. E. Moser,
- S. R. Anderson and
- R. W. Miller
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:
A cold treatment is not essential for rhizome formation. Cold treatments increased tillering but reduced the number of rhizomes.
Both initiation and elongation of rhizomes were favored by a 16- or 18-hour photoperiod when compared to a 8- or 12- hour photoperiod.
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.
Windsor generally produced more and longer primary and secondary rhizomes than Merion but the latter tillered more profusely than Windsor.
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