Wild Oat (Avena fatua) Competition with Spring Wheat: Plant Density Effects
- 1 March 1985
- journal article
- weed biology-and-ecology
- Published by Cambridge University Press (CUP) in Weed Science
- Vol. 33 (2), 176-181
- https://doi.org/10.1017/s0043174500082059
Abstract
Field experiments were conducted to measure the grain yield of wheat (Triticum aestivum L. ‘ANZA’) at various wild oat (Avena fatua L. ♯ AVEFA) and wheat plant densities. Wheat yield declined as wild oat plant density increased. Wheat yield increased in wild oat-infested plots as wheat plant density increased. Regression models were developed to describe the combined effect of wheat and wild oat plant densities on wheat grain yield. Wheat yields were best described by a nonlinear regression model using the relative density of wild oat in the weed-crop stand as the dependent variable. Inclusion of crop stand as a competitive factor significantly improved the fit of all regression models tested. Wild oat were more competitive against wheat in these experiments than in experiments reported by others. Possible reasons for differences in observed competitiveness are discussed.Keywords
This publication has 9 references indexed in Scilit:
- FIELD CONFIRMATION OF AN INDEX FOR PREDICTING YIELD LOSS OF WHEAT AND BARLEY DUE TO WILD OAT COMPETITIONCanadian Journal of Plant Science, 1979
- Winter Wheat Yield Reduction from Interference by Italian Ryegrass1Agronomy Journal, 1976
- AN INDEX OF COMPETITION FOR ESTIMATING CROP LOSS DUE TO WEEDSCanadian Journal of Plant Science, 1972
- The Quantitative Relationships Between Plant Population And Crop YieldPublished by Elsevier ,1969
- Competition of Wild Oat in Wheat and BarleyWeed Science, 1968
- COMPETITION OF WILD OATS (AVENA FATUA L.) IN WHEAT AND FLAX*Weed Research, 1967
- THE EFFECT OF COMPETITION FROM CEREAL CROPS ON THE GERMINATION AND GROWTH OF AVENA FATUA L. IN A NATURALLY‐INFESTED FIELDWeed Research, 1962
- A STUDY OF THE COMPETITION BETWEEN BARLEY AND OATS AS INFLUENCED BY BARLEY SEEDRATE, NITROGEN LEVEL AND BARBAN TREATMENTWeed Research, 1961
- ECONOMIC LOSSES CAUSED BY WEED COMPETITION IN MANITOBA GRAIN FIELDS. I. WEED SPECIES, THEIR RELATIVE ABUNDANCE AND THEIR EFFECT ON CROP YIELDSCanadian Journal of Plant Science, 1960