The effect of integration of biological and chemical fertilizers on yield, yield components and growth indexes of wheat

This experiment was carried out in 2012 at Marvdasht to determine the effects of chemical and biological fertilizers on some physiological characteristic and yield and its components of wheat (Triticum spp). The experiment was conducted as a factorial arranged in completely randomized blocks design with three replications. Treatments consisted of combined application levels nitrogen (N) at four levels (0, 75, 150, 225 kg pure nitrogen from urea fertilizer) and three levels of biological fertilizer (0, 100-g in 130-kg of seed and 200-g in 130-kg of seed). The results showed that highest grain yield (7.6 t.ha-1) was obtained with 225 kg N pure and 200-g in 130-kg of seed biological fertilizer and the lowest (2.9 t.ha-1). grain yield in control. The highest kernel number per spike and the highest 1000 kernel weight were obtained in integrated fertilizer treatment. application at integrated treatment 150- kg N and 200-g in 130-kg of seed biological fertilizer was not significantly different with integrated treatment 225- kg N and 100-g in 130-kg of seed biological fertilizer. In conclusion biological fertilizer can not be sufficient but integrated application of fertilizers (biological and chemical fertilizers) can significantly increase the wheat grain yield.