بررسی اثر تنش خشکی، کودهای شیمیایی و زیستی بر خصوصیات آگروفیزیولوژیک وفنولوژیک در گلرنگ

In order to study the effect of drought stress chemical fertilizer and bio-fertilizer on seed yield and important agronomic traits, an experiment was conducted in factorial split plot in randomized complete block design in two places during 2009-2010 cropping season in western Iran. In this experiment, different levels of irrigation (full irrigation, irrigation until heading and flowering stages) were assigned main plot and nitrogen chemical fertilizer (100% of nitrogen chemical fertilizer and 50% of recommended requirement) and bio-fertilizer (non-inoculation, inoculation with Azotobacter and Azospirillum and Azotobacter and Azospirillum) were chosen as a sub plot. The irrigation treatment was affect on days to maturity, the number of primary branch, head diameter, head weight, protein content and protein yield. Full irrigation had the highest days to maturity, the number of primary branch, head diameter, head weight and protein yield, irrigation until flowering had the highest protein content. The highest and lowest days to maturity, the number of primary branch, head diameter, head weight, protein content and protein yield was obtained from 100% of nitrogen chemical fertilizer. Application of bio-fertilizer had the positive effect on studied traits. Inoculation with Azotobacter and Azospirillum had the highest days to maturity, the number of primary branch, head diameter, head weight, protein content and protein yield.