اثر اسیدسالیسیلیک بر شاخص‌های رشد گیاه ماش (Vigna radiata L.) تحت تنش کم‌آبی
محورهای موضوعی : بوم شناسی گیاهان زراعی
1 - دانشجوی کارشناسی ارشد گروه زراعت دانشگاه ارومیه، ارومیه، ایران.
2 - استادیار گروه زراعت دانشگاه ارومیه، ارومیه، ایران.
کلید واژه: رشد, خشکی, اسیدسالیسیلیک, ماش,
چکیده مقاله :
به‌منظور بررسی اثر اسیدسالیسیلیک بر برخی از شاخص‌های رشد ماش (Vigna radiata L.) رقم NM92 ، تحت شرایط کم آبی، آزمایشی در قالب طرح کرت‌های خرد شده بر پایه طرح بلوکهای کامل تصادفی با سه تکرار در سال زراعی 1392-1391 در مزرعه تحقیقاتی دانشکده کشاورزی دانشگاه ارومیه انجام شد. فاکتورهای آزمایش شامل تنش کم‌آبی به‌عنوان فاکتور اول در سه سطح شاهد (آبیاری پس از رسیدن رطوبت خاک محدوده ریشه‌های کرت‌ها به Fc75%)، تنش1 (Fc60%) و تنش2 (Fc50%) و محلول‌پاشی اسیدسالیسیلیک، به‌عنوان فاکتور دوم در چهار سطح (0، 1/0، 5/0 و 1 میلیمول بر لیتر) بودند. نتایج نشان داد که تیمار mM5/0 اسیدسالیسیلیک در تمام شاخص‌های رشد بیشترین مقدار را به خود اختصاص داد. این غلظت از اسیدسالیسیلیک میزان ماده خشک، شاخص سطح برگ، سرعت رشد محصول، سرعت رشد نسبی و سرعت جذب خالص بیشتری را در اکثر مراحل رشد نسبت به بقیه غلظت‌ها دارا بود. بنابراین می‌توان استنباط نمود که کاربرد برگی این غلظت از اسیدسالیسیلیک می‌تواند اثرات تنش کم‌آبی بر شاخص‌های رشد را در گیاه ماش تعدیل نماید.
To study the effect of salicylic acid on growth indicesof mung bean, Vigna radiata L. (Var. NM92) under water deficit stress condition, a split-plot experiment was carried out based on a randomized complete block design with three replications in Research Station of Urmia University in 2012. The main factor was water deficit stress with three levels of irrigation at soil moisture of 75% Fc (control), 60% Fc and 50% Fc field capacity in the root zone), and foliar application of salicylic acid was considered as sub-factor with four levels (0, 0.1, 0.5 and 1 mM). Results showed that application of 0.5 Mm salicylic acid caused the highest values for all the growth indices studied. Salicylic acid 0.5 Mm resulted in the highest total dry matter (TDM), leaf area index (LAI), crop growth rate (CGR), relative growth rate (RGR) and net absorbsion rate (NAR) in almost all growth stages in comparison to the other treatments and therefore, it can be concluded that foliar application of salicylic acid 0.5 mM can ameliorate the adverse effects of water deficit on growth indices of mung bean.
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