Influence of nitrogen and crop density on Spring Wheat (Triticum aestivum L.) yield, yield components and wild oat (Avena Ludoviciana L.) suppression

摘要: A field study was conducted to determine the effects of different levels nitrogen and crop density on yield, yield components wild oat (Avena Ludoviciana L.) control. The treatments were fertilization (100, 150 190 kg ha-1) (400, 500, 600 700 plants m-2) spring wheat, grown under high weed pressure. experimental design factorial with three replications. Result showed that increase higher wheat densities able suppress biomass production. Nitrogen increased it grain number spikes, grains per spike 1000grain weight. At highest density, biomass, 1000-grain weight less than lowest density. In addition, had a positive effect spikes m -2 yield. obtained fertilization. results indicate impact competitiveness suppression.