محلولپاشی نیترات کلسیم باعث بهبود فتوسنتز و افزایش فعالیت آنتیاکسیدانی شده و عمر گلدانی گل رز را افزایش میدهد
محورهای موضوعی : مجله گیاهان زینتی
سعید خسروی
1
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لیلا چهل تنان
2
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علی تهرانی فر
3
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امیرحسین خوش گفتارمنش
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1 - گروه علوم باغبانی و مهندسی فضای سبز دانشکده کشاورزی، دانشگاه فردوسی مشهد، ایران
2 - گروه علوم باغبانی و مهندسی فضای سبز دانشکده کشاورزی، دانشگاه فردوسی مشهد، ایران
3 - استاد گروه باغبانی و فضای سبز دانشکده کشاورزی دانشگاه فردوسی مشهد، ایران
4 - گروه علوم خاک، دانشکده کشاورزی، دانشگاه صنعتی اصفهان، اصفهان، ایران
کلید واژه: تغذیه کلسیم, رشد, شاخص پایداری غشا, فتوسنتز, کیفیت پس از برداشت,
چکیده مقاله :
افزایش فتوسنتز برای افزایش رشد بسیار مهم است، همچنین تقویت فعالیت آنزیم های آنتیاکسیدانی سبب بهبود کیفیت و عمر گلجای رز میشود. در این مطالعه، تأثیر محلولپاشی با غلظتهای مختلف نیترات کلسیم بر فتوسنتز، فعالیت آنزیمهای آنتیاکسیدانی و عمر گلجایی رز جهت رسیدن به این اهداف مورد بررسی قرار گرفت. این آزمایش به صورت فاکتوریل و در قالب طرح کاملاً تصادفی بر روی دو رقم گل رز انجام شد. نیترات کلسیم در غلظتهای 0 (شاهد)، 80 و 160 میلیگرم در لیتر هر هفته بر روی دو رقم "سامورایی" و "جمیلیا" محلولپاشی شد. نتایج نشان داد که محلولپاشی با نیترات کلسیم در غلظت 160 میلیگرم در لیتر، بهترتیب با افزایش 23/3 درصد و 35/3 درصد میزان فتوسنتز در رقم "جمیلیا" و "سامورایی" سبب بهبود صفات رشدی در هر دو رقم رز شد. علاوه بر این، استفاده از 160 میلی گرم در لیتر نیترات کلسیم باعث افزایش میزان تعرق شد که متعاقباً منجر به افزایش غلظت کلسیم در برگها و گلبرگهای رقم "سامورایی" (بهترتیب 2/9 و 2/5 برابر) و "جمیلیا" (بهترتیب 1/9 و 1/6 برابر) شد. استفاده از 160 میلیگرم در لیتر نیترات کلسیم با افزایش فعالیت پراکسیداز، سوپراکسید دیسموتاز و کاتالاز بهترتیب سبب افزایش 10/4 و 13/6 درصد در شاخص پایداری غشا در ارقام "سامورایی" و "جمیلیا" گردید، این امر به افزایش طول عمر گلجای به میزان 4/33 روز در "سامورایی" و 4/03 روز در "جمیلیا" منجر شد. بهطور کلی، استفاده از 160 میلیگرم در لیتر نیترات کلسیم باعث افزایش کیفیت گلهای تولیدی شد و با بهبود فعالیت آنزیمهای آنتیاکسیدانی، عمر گلجای هر دو رقم رز را نیز افزایش داد.
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