نوع مقاله : مقاله پژوهشی
دانشکده کشاورزی و منابع طبیعی، دانشگاه گنبد کاووس، ایران
عنوان مقاله [English]
In order to evaluate the effect of terminal drought stress on yield and yield components and harvest index of bean cultivars, a factorial experiment based on completely randomized design with 3 replications was conducted in green house at faculty of agriculture, Gonbad Kavoos University. The treatments included terminal drought stress (Podding stage) in 3 levels i.e. full irrigation as the control, slight water stress (30% water depletion of filed capacity) and intensive water stress (70% water depletion of field capacity); and the second factors were four bean cultivars including withe (Daran), red (Azadshahr), green (Sanrey) and pinto (Saman). The seeds were planted in 12 kg pots containing soil. In this study; traits such as number of pods per plant, number of seeds per pod, seed weight, seed weight per plant, total dry weight and harvest index were measured. Results showed that terminal drought stress had a significant effect on all of the studied traits. Effects of cultivar on all traits, except harvest index and number of seeds per plant, were similar to results of drought stress. It was also observed that interaction effect of drought stress and cultivar on all studied traits except the number of pods per plant, was significant. The lowest and the highest seed yields were obtained for withe and pinto beans during intensity with 0.96 and 1.25 gr/plant, respectively. Overall, results of this study revealed that pinto and withe beans had the lowest and the highest sensitivity to the terminal drought stress, respectively.