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Persistence, Germinability, and Distribution of Jointed Goatgrass (Aegilops cylindrica) Seed in Soil

Published online by Cambridge University Press:  12 June 2017

William W. Donald  and
Robert L. Zimdahl
William W. Donald
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Metabolism and Radiation Res. Lab., Fargo, ND 58105
Robert L. Zimdahl
Affiliation:
Dep. Plant Pathol. and Weed Sci., Colorado State Univ., Fort Collins, CO 80523
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Abstract

The persistence and germinability of jointed goatgrass (Aegilops cylindrica Host. # AEGCY) seed (caryopses) were studied over a five-year period between 1979 and 1984 at five locations in Colorado, Kansas, and Nebraska. Seed were buried in open-mesh packets and the sites were not disturbed for the duration of the study. Seed survival at burial depths of 5, 15, or 30 cm decreased rapidly over the first three years at all locations. By the third year, less than 7.4 ± 6.5% (mean ± SD) of the seed remained at 5 cm in the soil at all locations. By the third, fourth, and fifth year there was total loss of seed at one, two, and four sites at the 5-cm burial depth. Only three of five sites had total loss of seed at 30 cm after five years. The proportion of surviving seed that were germinable increased with time and was almost 100% after three years of burial. Because jointed goatgrass seed were relatively transient in the soil profile, fallowing of infested areas for a three-year period may significantly reduce populations of this weed or eradicate it, depending upon location.

Keywords

DormancyTriticum aestivumAEGCY
Type
Weed Biology and Ecology
Information
Weed Science , Volume 35 , Issue 2 , March 1987 , pp. 149 - 154
Copyright
Copyright © 1987 by the Weed Science Society of America 

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