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Dormancy, Germination, and Emergence Characteristics of Fall Panicum (Panicum dichotomiflorum) Seed

Published online by Cambridge University Press:  12 June 2017

B. J. Brecke  and
W. B. Duke
B. J. Brecke
Affiliation:
Dep. Agron., Cornell Univ., Ithaca, New York 14853
W. B. Duke
Affiliation:
Dep. Agron., Cornell Univ., Ithaca, New York 14853
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Abstract

Fall panicum (Panicum dichotomiflorum Michx.) seed were found to be dormant at harvest. This dormancy was overcome by an after-ripening period of 17 to 22 weeks, alternating germination temperatures (10 C for 16 h and 30 C for 8 h), stratification, and mechanical or chemical scarification. Soaking seed in gibberellic acid (GA3) or thiourea for 1 day, or washing seed in running tap water for up to 96 h before seed were placed in a germinator, had no effect on dormancy. In the greenhouse, fall panicum emergence was greatest (82%) when seed were placed on the growth media surface. The maximum number of seedlings (39%) emerged in the field when seed were placed 1.3 cm below the soil surface, although some emerged from as deep as 5.1 cm.

Keywords

Biologystratificationscarificationafter-ripeningdepth
Type
Research Article
Information
Weed Science , Volume 28 , Issue 6 , November 1980 , pp. 683 - 685
Copyright
Copyright © Weed Science Society of America 

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References

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