بررسی رشد گل جعفری در روش های مختلف کوددهی با کودهای کامل با نسبتهای مختلف NPK
Subject Areas : Journal of Ornamental Plants
Mitradat Ahmadi
1
(M.Sc. Student, Department of Horticulture, Science and Research Branch, Islamic Azad University, Tehran, Iran)
Ali Mohammadi Torkashvand
2
(Associate Professor, Department of Soil Science, Science and Research Branch, Islamic Azad University, Tehran, Iran)
Raheleh Ebrahimi
3
(Assistant Professor, Department of Horticulture, Science and Research Branch, Islamic Azad University, Tehran, Iran)
Keywords: کوددهی, کود کامل, ریزمغذی, تغذیه گیاه, گل جعفری,
Abstract :
تغذیه یک رکن اساسی در رشد و پرورش گیاهان است. شیوه کوددهی و حاصلخیز نمودن خاک و بسترهای کشت، نقش مهمی در تولید کمی و کیفی محصولات زراعی و باغی دارد. این تحقیق با هدف تهیه چند فرمول کودی و چند روش کوددهی بر رشد گیاه محک (گل جعفری) طراحی و اجرا شد. چهار نوع فرمول کودی با نسبتهای مختلف N، P و K و مقادیر ثابت ریزمغذیها بهعنوان کودهای مایع کامل در آزمایشگاه علوم خاک مجتمع آزمایشگاهی شیخ بهایی دانشگاه آزاد اسلامی واحد علوم و تحقیقات تهران تهیه شدند. در یک طرح کاملا تصادفی، اثر 13 تیمار مختلف کودی به همراه یک تیمار شاهد شامل استفاده از کودهای مختلف در زمانهای مختلف رشد رویشی و زایشی و هر تیمار در چهار تکرار بر رشد گل جعفری مورد ارزیابی قرار گرفت. شاخصهای رشد رویشی گیاه شامل ارتفاع نهایی گیاه، تعداد گل و شاخههای جانبی، وزن تر و خشک ریشه، گل و اندام هوایی مورد ارزیابی قرار گرفت. نتایج کلی نشان داد که روشهای مختلف کوددهی و فرمولهای متفاوت کودی بر رشد گیاه، اثر مثبت در مقایسه با شاهد داشت. تغییرات رشد گیاه در مقایسه با شاهد و در روشها و فرمولهای کودی معنیدار بود. بهترین اثر بر رشد گیاه در تیمار شماره 6 دیده شد و این تیمار برای رشد گل جعفری توصیه میشود. در این تیمار، در هفته چهارم از کاشت نشاء از فرمول اول شامل نسبت پایه نیتروژن، فسفر و پتاسیم، 15-10-15 و در هفتههای پنجم و ششم از فرمول دوم شامل نسبت پایه نیتروژن، فسفر و پتاسیم، 15-20-30، استفاده شد.
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