the effects of nitroxin and nitrogen fertilizer on yield and yield components of winter wheat (triticum aestivum l.)

in other to evaluate the effects of nitroxin biofertilizer and different levels of nitrogen fertilizer, on yield and yield components of winter wheat (triticum aestivum), a field experiment was conducted in research station, college of agriculture, ferdowsi university of mashhad in 2009-2010. the experiment was conducted as a factorial arrangement based on completely randomized block design with three replications. the experimental treatments were all combination of nitroxin biofertilizer in two levels (inoculated with nitroxin and non inoculated), and nitrogen fertilizer in six levels (0, 10, 20, 40, 80, 160 and 320 kg ha-1 urea). result showed that combination of biofertilizer with different levels of n fertilizer, had significant effect (p<0.01) on yield and yield components such as number of tiller per plant, biological yield, and harvest index. the highest and the lowest biological yield were obtained in combination of 160 kg ha-1 urea + nitroxin and control treatments, respectively. it seems that, increased seed yield with combination treatments have been caused by the combined effects of biofertilizer and n fertilizer. therefore, nitrogen fertilizer combined with biofertilizer could be used as a suitable replacement of chemical fertilizers.