Author:
Fleming Gwen F.,Young Frank L.,Ogg Alex G.
Abstract
In three replacement series experiments, winter wheat (Triticum aestivumL.), jointed goatgrass (Aegilops cylindricaHost. #3AEGCY), and downy brome (Bromus tectorumL. # BROTE) were paired in all possible combinations to determine competitive relationships during vegetative growth. Under growth chamber conditions of ample fertility and soil moisture and day/night temperatures of 18/10 C, relative yield totals for the three species were similar, indicating that they compete for the same resources. Both winter wheat and jointed goatgrass had greater plant growth and higher relative crowding coefficients than downy brome, which indicated a hierarchy of relative competitiveness of winter wheat > jointed goatgrass >> downy brome. In other growth chamber studies, winter wheat was slightly more competitive than jointed goatgrass regardless of fertility levels. Winter wheat was the superior competitor at 18/10 C and −33 kPa (soil moisture), whereas jointed goatgrass was superior at 27/10 C and −300 kPa, conditions that are frequently encountered in the Pacific Northwest.
Publisher
Cambridge University Press (CUP)
Subject
Plant Science,Agronomy and Crop Science
Reference27 articles.
1. Model LI-3000. Li-Cor, Inc., Lincoln, NE.
2. Letters following this symbol are a WSSA-approved computer code from Composite List of Weeds, Weed Sci. 32, Suppl. 2. Available from WSSA, 309 West Clark Street, Champaign, IL 61820.
3. Tiller Development at the Coleoptilar Node in Winter Wheat
1
4. U.S. Dep. Agric., Agric. Res. Serv. 1970. Pages 32, 46–47, in Selected Weeds of the United States. Agric. Handb. No, 366.
5. Influence of soil moisture, temperature, and compaction on the germination of downy brome (Bromus tectorum);Thill;Weed Sci.,1979
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