نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجو کارشناسی ارشد دانشگاه آزاد اسلامی واحد مهاباد، گروه زراعت و اصلاح نباتات، دانشگاه آزاد اسلامی، واحد مهاباد، مهاباد

2 هیئت‌علمی دانشگاه آزاد اسلامی، گروه زراعت و اصلاح نباتات، دانشگاه آزاد اسلامی، واحد مهاباد، مهاباد

چکیده

با هدف بررسی اثر محلول‌پاشی شکل‌های مختلف کود ‌آهن بر عملکرد و خصوصیات علوفه ماشک در شرایط تنش خشکی تحقیقی در سال زراعی 1400 به صورت اسپلیت پلات در چهار تکرار اجرا شد. سطوح مختلف آبیاری شامل عدم آبیاری (شرایط دیم)، یک بار آبیاری و دو بار آبیاری در کرت‌های اصلی و محلول پاشی شکل‌های مختلف کود ‌آهن شامل شاهد (محلول پاشی‌پاشی با آب) کلات ‌آهن (Fe-EDTA)، نانوکلات ‌آهن (خضرا) و منبع غیرکلاته سولفات ‌آهن در کرت‌های فرعی قرار گرفتند. نتایج شرایط دیم در مقایسه با تیمار دو بار آبیاری عملکرد علوفه تر و خشک و محتوی پروتئین علوفه را به ترتیب 71.65، 50.16، 58.58 درصد کاهش و الیاف نامحلول در شوینده اسیدی دیواره سلولی(ADF) را 48.15 درصد افزایش داد، همچنین تحت تیمار نانوکلات ‌آهن علوفه تر و خشک، محتوی پروتئین علوفه و محتوی کربوهیدارت‌های محلول به ترتیب 84.35، 40.19، 22.90 و 64.08 افزایش و الیاف نامحلول در شوینده خنثی دیواره سلولی (NDF) 11.60درصد کاهش یافت. در بین تیمارهای برهمکنش آبیاری با محلول‌پاشی آهن بالاترین محتوی کلروفیل (به ترتیب 133.45 و 131.04 میلی‌گرم بر گرم وزن تر)، ارتفاع بوته (به ترتیب 23.81 و 23.43 سانتی متر)، درصد قابلیت هضم علوفه (به ترتیب 42.72 و 77.10 درصد)، درصد فیبر (به ترتیب 37.75 و 40.98) و درصد خاکستر علوفه (به ترتیب 19.37 و 21.01 درصد) و کمترین NDF دیواره سلولی (به ترتیب 21.78 و 26.93 درصد) در تیمار کلات ‌آهن (Fe-EDTA) و نانوکلات ‌آهن و دو بار آبیاری ثبت شد. نتاج نشان داد کلات ‌آهن (Fe-EDTA) تحت تیمار یک بار آبیاری توانست محتوی کلروفیل برگ، درصد قابلیت هضم علوفه و درصد فیبر علوفه را در مقایسه با تیمار شاهد به صورت معنی‌داری افزایش دهد.ت محلول‌پاشی کود آهن از منابع کلات ‌آهن (Fe-EDTA) و نانو کلات ‌آهن (خضرا) و دو بار آبیاری جهت دستیابی به حداکثر خصوصیات کمی و کیفی علوفه ماشک گل خوشه‌ای قابل توصیه است.

کلیدواژه‌ها

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