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Crop Science Abstract -

Growth of Vernalized and Nonvernalized Creeping Foxtail1


This article in CS

  1. Vol. 16 No. 2, p. 172-174
    Received: Apr 2, 1975

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  1. C. B. Rumburg and
  2. E. G. Siemer2



Herbage dry matter (HDM) accumulation Gom artificially vernalized (V) plants of ‘Garrison’ creeping foxtail (Alopecurus arundinacea Poir.) was greater than nonvernalized (NV) plants during 46 days in a growth chamber at 27/4 C (day/night). Ratio of reproductive to total shoots was 0.075 with V and 0.004 with NV. Stems and sheaths contributed about 50 and 28% of final HDM of V and NV, respectively. Shoot number was similar between V and NV at the start, but new shoots of NV developed at nearly three times the rate of V. This difference, though, was offset by a slightly increased leaf weight and nearly doubled sheath and stem weight of V over NV. Leaves/shoot were 2.0 and 1.5 on day 6 for V and NV, respectively. The V treatment retained about 0.5 leaf per shoot advantage until day 46 when the values for both were about 3.4 leaves/shoot. Mean relative growth rates (RGR) derived from quadratic functions of HDM over time for V and NV were not significantly different. However RGR of V was slightly higher than NV during the period from 6 to 13 days while RGR values from 13 to 46 days were similar for both treatments.

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