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اثر محلولپاشی سطوح مختلف اسید هیومیک بر برخی خصوصیات مورفوفیزیولوژیکی و بیوشیمیایی خرفه ( Portulaca oleracea) تحت تأثیر تنش خشکی | ||
تنشهای محیطی در علوم زراعی | ||
مقاله 8، دوره 15، شماره 3، مهر 1401، صفحه 669-680 اصل مقاله (391.17 K) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22077/escs.2021.3977.1947 | ||
نویسندگان | ||
رقیه بام شاد1؛ علیرضا سیروس مهر* 2؛ علی اکبر محمودی1؛ نورالله حیدری صادق1 | ||
1دانشآموخته کارشناسی ارشد گیاهان دارویی، گروه باغبانی، دانشکده کشاورزی، دانشگاه زابل | ||
2دانشیار گروه زراعت، دانشکده کشاورزی دانشگاه زابل، زابل | ||
چکیده | ||
چکیده به دلیل نگرانیهای زیست محیطی ناشی از مصرف کودهای شیمیایی، اخیراً استفاده از انواع اسیدهای آلی برای بهبود کمی و کیفی محصولات زراعی و باغی رواج فراوان یافته است و به دلیل وجود ترکیبات هورمونی اثرات مفیدی در افزایش تولید و بهبود کیفیت محصولات کشاورزی دارند. بهمنظور بررسی اثرات تنش خشکی و محلولپاشی اسید هیومیک بر خصوصیات مورفوفیزیولوژیکی و بیوشیمیایی خرفه، آزمایشی به صورت کرتهای خرد شده در قالب بلوکهای کامل تصادفی با سه تکرار انجام شد. تنش خشکی در سه سطح: (90، 70 و 50 درصد ظرفیت زراعی) و اسید هیومیک در چهار سطح (صفر، 25، 50 و 75 میلیگرم در لیتر) اجرا گردید. نتایج نشان دهنده اختلاف معنی دار اثر تنش خشکی، اسید هیومیک و برهمکنش آنها بر اکثر صفات مورد بررسی بود. صفاتی از قبیل ارتفاع و طول ریشه در تنش خشکی به ترتیب (70 و 50 درصد ظرفیت زراعی) افزایش معنیداری نسبت به تیمار شاهد نشان دادند. وزن تر و خشک ریشه در شرایط تنش شدید (50 درصد ظرفیت زراعی) کاهش معنیداری نسبت به شاهد نشان داد و محلولپاشی اسید هیومیک با غلظت (75 میلیگرم در لیتر) تحت تنش خشکی سبب بهبود این صفات نسبت به تیمار شاهد گردید. افزایش مقادیر رنگیزههای فتوسنتزی در تنش (70 درصد ظرفیت زراعی) و محلولپاشی (50 میلیگرم در لیتر) اسید هیومیک مشاهده شد. بالاترین میزان کربوهیدرات و پرولین در گیاه حاصل از محلولپاشی به ترتیب (25 و 50 میلی گرم در لیتر) تحت تنش ملایم خشکی مشاهده شد. بنابراین با توجه به افزایش مقادیر اکثر صفات مورد بررسی در شرایط تنش ملایم و شدید میتوان اظهار داشت که مقدار (50 تا 75 میلیگرم در لیتر) محلولپاشی اسید هیومیک در شرایط کمبود آب موجود برای خرفه به خصوص تنش شدید (50 درصد ظرفیت زراعی) میتواند تا حدودی مفید باشد. | ||
کلیدواژهها | ||
پرولین؛ رنگیزههای فتوسنتزی؛ کود آلی؛ کم آبیاری | ||
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مراجع | ||
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