نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشگاه فردوسی مشهد-دانشکده کشاورزی- گروه اگروتکنولوژی
2 گروه اگروتکنولوژی - دانشکده کشاورزی دانشگاه فردوسی مشهد
3 گروه زراعت- دانشکده کشاورزی- دانشگاه فردوسی مشهد
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
To evaluate the effects of different drought stress levels on the morpho-physiological responses of wild mustard and chickpea under interference conditions, a factorial experiment was conducted in a completely randomized design with three replications in the research greenhouse of the Faculty of Agriculture, Ferdowsi University of Mashhad. The experimental treatments comprised five interference ratios of chickpea/wild musturd (100/0, 75%/25%, 50%/50%, 25%/75% and 0/100%) and three drought stress levels (50%, 75%, and 90% field capacity). Results indicated that increasing drought stress intensity (from 90% to 50% field capacity) reduced chickpea bilogical and grain yields by up to 45% and 60%, respectively. Moreover, higher proportions of wild mustard interference significantly decreased chickpea grain yield; grain yield declined by 20%, 40%, and 65% as chickpea proportion decreased from 100% to 25%. Physiological parameters of chickpea, including stomatal conductance and net photosynthesis rate, were also markedly influenced by both drought stress and competitive ratios. At 50% field capacity, stomatal conductance and photosynthetic rate decreased by 35% and 45%, respectively, whereas at 75% field capacity, reductions reached 50% and 60%. Increasing wild mustard interference exerted a pronounced negative effect: in the 25%/75% mixture, stomatal conductance and net photosynthesis were 30% lower than in the sole chickpea treatment. The interaction between drought stress and interference ratio revealed that under the severe drought stress (50% field capacity) combined with the highest wild mustard interference (75%/25%), chickpea yield declined by more than 75%. Notably, severe drought stress appeared to attenuate the competitive ability of wild mustard,,
کلیدواژهها [English]
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