Effect of Wild Oat (Avena fatua L.) Population and Nitrogen Levels on Some Agronomic Traits of Spring Wheat (Triticum aestivum L.)

Authors : Imtiaz KHAN, Gul HASSAN, Muhammad Ishfaq KHAN, Meher GUL

Pages : 91-101

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Publication Date : 2007-03-01

Article Type : Research Paper

Abstract :A field experiment was conducted to determine the effect of wild oat insert ignore into journalissuearticles values(Avena fatua); densities on wheat insert ignore into journalissuearticles values(Triticum aestivum); yield, its components and protein content under varying nitrogen regimes, at the Agricultural Research Farm, North West Frontier Province Agricultural University, Peshawar, Pakistan, during winter 2004-5. The experiment comprised 3 nitrogen levels insert ignore into journalissuearticles values(75, 100, and 125 kg ha-1); assigned to main plots and 5 wild oat densities insert ignore into journalissuearticles values(0, 10, 20, 30, and 40 plants m-2); kept in sub-plots. The data were recorded on some agronomic and physiological parameters of wheat and wild oats. The statistical analyses of the data exhibited non-significant differences for nitrogen levels in all the parameters studied, while oat density and the interaction of density with nitrogen levels were significant for all the parameters studied. Less than 1 wild oat plant m-2 inflicted a 1% reduction in wheat yield, while a 30% reduction in yield was predicted with the infestation of 15, 17, and 16 plants m-2 under 75, 100, and 125 N kg ha-1 fertiliser regimes. We also discovered a wild oat density related reduction in grain protein content, which is a cause for further alarm. About 16 wild oat plants m-2 reduced protein content by 1%, which is alarming for countries with vegetable-based diets, like Pakistan.
Keywords : Competition, wild oat densities, nitrogen levels, yield, protein content