ارزیابی کاربرد هیومیک اسید بر شاخص¬های مورفوفیزیولوژیکی گیاه ذرت (Zea mays) تحت تنش شوری
محورهای موضوعی : مورفوفیزیولوژیکیابراهیم فانی 1 * , محمد علی جلال پوری 2
1 - گروه زیست شناسی، دانشکده علوم پایه، دانشگاه صنعتی خاتم الانبیاء (ص) بهبهان، خوزستان
2 - گروه کشاورزی، واحد بهبهان، دانشگاه آزاد اسلامی بهبهان، بهبهان، ایران
کلید واژه: آنتوسیانین, ارتفاع ساقه, , کلروفیل a, کلروفیل کل, قند محلول,
چکیده مقاله :
به منظور بررسی اثرات تنش شوری و کوددهی هیومیک اسید بر روی گیاه ذرت، مطالعهای بهصورت گلدانی در 3 تکرار با طرح آزمایشی فاکتوریل در قالب پایه کاملاً تصادفی به اجرا درآمد. تیمارها شامل تنش شوری در دو سطح (بدون تنش و تنش 100 میلیمولار) و کوددهی هیومیک اسید در سه سطح ( عدم کوددهی، کوددهی 100 میلیگرم در لیتر و کوددهی 200 میلیگرم در لیتر) بود. هدف از این مطالعه، بررسی اثرات کوددهی هیومیک اسید بر صفات مورفولوژیکی و فیزیولوژیکی گیاه ذرت در شرایط تنش شوری و ارزیابی نقش هیومیک اسید در بهبود صفات ذکر شده و کاهش اثرات مضر تنش شوری در گیاه ذرت به عنوان یک گیاه مهم از نظر تامین غذای انسان بود. نتایج نشان داد که تنش شوری در سطح معنی داری سبب کاهش میزان ارتفاع ساقه و کلروفیل کل در گیاه ذرت شد، درحالیکه تیمار هیومیک اسید در سطح معنی‌داری سبب کاهش اثرات مضر شوری برآنها شد. در شوری 100 میلیمولار، کاربرد کود 100 میلیگرم در لیتر هیومیک اسید در مقایسه با عدم کاربرد آن، ارتفاع ساقه را 26/6 درصد افزایش داد. همچنین در تنش شوری 100 میلیمولار، میزان کلروفیل کل در کوددهی 200 میلیگرم در لیتر هیومیک اسید نسبت به عدم کوددهی بیش از دو برابر افزایش نشان داد. بنابراین با توجه به نتایج این تحقیق میتوان مصرف هیومیک اسید را جهت بهبود رشد رویشی گیاه ذرت در شرایط تنش شوری توصیه کرد.
In order to investigate the effects of salinity stress and humic acid fertilization on corn plants, a pot study was carried out in 3 replications with a factorial experimental design in a completely random basis. The treatments included salinity stress at two levels (no stress and 100 mM stress) and humic acid fertilization at three levels (no fertilization, 100 mg/L fertilization and 200 mg/L fertilization). The purpose of this study was to investigate the effects of humic acid fertilization on the morphological and physiological traits of corn plants under salinity stress conditions and to evaluate the role of humic acid in improving the mentioned traits and reducing the harmful effects of salinity stress in corn plants as an important plant in supplying human food. The results showed that salinity stress significantly reduced the stem height and total chlorophyll in corn plants, while humic acid treatment significantly reduced the harmful effects of salinity. At 100 mM salinity, the application of 100 mg/L humic acid fertilizer increased the stem height by 6.26% compared to its non-application. Also, in the salinity stress of 100 mM, the amount of total chlorophyll in 200 mg/L humic acid fertilization increased more than twice compared to no fertilization. Therefore, according to the results of this research, it is possible to recommend the use of humic acid to improve the vegetative growth of corn plants under salt stress conditions.
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