اثر تنش خشكي بر عملكرد و اجزاي عملكرد چهار رقم گندم در شهر قدس

Effect of drought stress on yield and yield components of four wheat cultivars in Shahr-e-Gods

This experiment was conducted to evaluate the effect of drought stress on four wheat varieties (SHIRAZ, CHAMRAN, PISHTAZ and NICNEJAD), this research was performed under field condition at Islamic Azad University of Shahriar-Shahr-e-Gods branch in 2006-2007. In field experiments certified varieties were planted in a split plot design with four replications as main plot was consist of two levels of irrigations (100%FC and 50%FC) and varieties were in split plots, results showed that that effect of drought stress on plant height, number of seed, weight of 1000 seed, seed yield, Harvest index, Spike length, number of seeds in spike, number of spike, weight of spike, biological yield were significant. Mean Compare seed yield under drought stress showed that varieties had higher economic yield in non stress with 4374.8 kg/ha and 4628.4 kg in 2007 and 2008 in compare with drought stress, and NICNIZHAD and CHAMRAN had higher yield than other varieties in drought stress and also treatments under normal stress were higher that treatments under drought condition. It was resulted that Chamran varieties had more biological yield in compare with other cultivars.