تأثیر محلول‌پاشی برگی منابع مختلف کلسیم بر کیفیت و ویژگی‌های آنتی‌اکسیدانی کلم گل رقم ’رومانسکو‘ (Brassica oleracea cv. botrytis ‘Romanesco’)

علوم باغبانی

مقاله 3، دوره 36، شماره 3 - شماره پیاپی 55، آذر 1401، صفحه 577-589   

نوع مقاله: مقالات پژوهشی

شناسه دیجیتال (DOI): 10.22067/jhs.2021.70150.1047

نویسندگان

رضا نجفی؛ طاهر برزگر^*

گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران

چکیده

به­منظور ارزیابی تاثیر منابع مختلف کلسیم بر خواص آنتی­اکسیدانی و کیفیت کلم­گل رقم ’رومانسکو‘، آزمایشی به صورت طرح بلوک­های کامل تصادفی در سه تکرار، در مزرعه تحقیقاتی دانشگاه زنجان در سال 1397 انجام شد. تیمارهای آزمایشی، محلول­پاشی برگی منابع مختلف کلسیم شامل کلرید کلسیم (3/0، 6/0 و 9/0 درصد)، لاکتات کلسیم (5/0، 1 و 5/1 گرم در لیتر) و نیترات کلسیم (5/0، 1 و 5/1 درصد) و محلول­پاشی با آب مقطر به عنوان شاهد بود. نتایج نشان داد که محلول­پاشی برگی کلسیم، مقدار پتاسیم را به­طور معنی­داری افزایش و فسفر را کاهش داد و بیشترین مقدار پتاسیم (6/5 میکروگرم بر گرم ماده خشک) در گیاهان تیمار شده کلرید با کلسیم  9/0 درصد حاصل شد. بیشترین میزان فلاونوئید (86/0 و 85/0 میلی­گرم در 100 گرم وزن تر) به ترتیب در گیاهان تیمار شده با لاکتات کلسیم 5/1 گرم در لیتر و کلرید کلسیم 9/0 درصد به دست آمد. محلول­پاشی برگی نیترات کلسیم 5/1 درصد و کلرید کلسیم 9/0 درصد، محتوای ویتامین ث را به ترتیب 3/49 درصد و 4/40 درصد در مقایسه با شاهد افزایش دادند. کاربرد کلسیم با افزایش مقدار ویتامین ث، فنل و فلاونوئید کل، ظرفیت آنتی­اکسیدانی کلم­گل را بهبود بخشید. کاربرد ترکیبات کلسیمی محتوای مواد جامد محلول کل و اسید قابل تیتراسیون را افزایش دادند به­طوری که بیشترین مقدار مواد جامد محلول (5/12 درصد بریکس) و اسید قابل تیتراسیون (84/28 درصد) در تیمار کلرید کلسیم 9/0 درصد حاصل شد. بنابراین با توجه به نتایج حاصل، کاربرد نیترات کلسیم 5/1 درصد،  کلرید کلسیم 9/0 درصد و لاکتات کلسیم 5/1 گرم در لیتر جهت بهبود خواص آنتی­اکسیدانی و کیفیت کلم­گل پیشنهاد می­گردد.

کلیدواژه‌ها

پتاسیم؛ فعالیت آنتی‌اکسیدانی؛ مواد جامد محلول؛ ویتامین ث

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