بررسی روش‌های کاربرد نیتروکسین و نیتروژن بر عملکرد و برخی صفات فیزیولوژیکی ذرت دانه‌ای (L. zea mays) رقم سینگل کراس 704
محورهای موضوعی : ژنتیک
1 - گروه زراعت، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران
2 - گروه زراعت، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران
کلید واژه: ذرت, عملکرد دانه, کود نیتروژن, شاخص کلروفیل, کود نیتروکسین,
چکیده مقاله :
به‌منظور بررسی روش های کاربرد نیتروکسین و نیتروژن بر عملکرد و اجزای عملکرد ذرت دانه ای رقم سینگل کراس 704، آزمایشی در سال زراعی 94-1393در شهرستان اهواز به‌صورت کرت های خرد شده در قالب طرح بلوک‌های کامل تصادفی در سه تکرار اجراء گردید. تیــمارهای مورد مطالعه در آزمایش شامل، کود نیتروژن خالص در چهار سطح (100 درصد: N1، 75 درصد: N2، 50 درصد: N3، 25 درصد: N4) 100 درصد نیتروژن خالص (معادل 180 کیلوگرم در هکتار)به‌عنوان فاکتور اصلی و روش کاربرد نیتروکسین در دو سطح (بذر مال: B1 و همراه با آب آبیاری: B2)به‌عنوان فاکتور فرعی بود. نتایج نشان داد که تیمار کود نیتروژن باعث افزایش معنی دار عملکرد دانه و صفات فیزیولوژیکی گردید. بیشترین عملکرد دانه از تیمار 75 درصد کود نیتروژن و کمترین از تیمار 25 درصد کود نیتروژن بدست آمد. همچنین اثر روش کاربرد نیتروکسین تأثیر معنی‌داری بر عملکرد، کلروفیل a وb و کارایی مصرف و کارایی زراعی نیتروژن نشان نداد. بیشترین عملکرد دانه از تیمار B1بذر مال به‌دست آمد. در این تحقیق روش کاربرد کود زیستی نیتروکسین تأثیر معنی‌داری بر صفات آزمایش نشان نداد اما مصرف این کود زیستی در کنار کودهای شیمیایی نیتروژن، توانست علاوه بر تولید محصول کافی و بهبود کارایی جذب نیتروژن، مصرف کود شیمیایی نیتروژن را به میزان 25 درصد کاهش دهد.
To evaluate the application methods of nitroxin and nitrogen fertilizers on yield and physiological traits of maize (SC 704), a field experiment was carried out in Ahvaz based on a split plot randomized complete block design with three replications during 2013-2014. The treatments included four levels of nitrogen fertilizer (N1:100%, N2: 75%, N3:50%, N4: 25%) pure nitrogen (equivalent to 180 kg per hectare) as the main factor and nitroxin biological fertilizer application method at two levels (seed inoculation B1 and with irrigation water B2) as the secondary factor. The results showed that nitrogen fertilizer significantly increased grain yield and physiological traits. The highest and lowest grain yields were obtained in 75% and 25% nitrogen treatments respectively. The biological fertilizer, nitroxin, had a significant impact on performance, chlorophyll a and b, efficiency, and NAE. The highest grain yield was recorded in B1 (seed treatment). In this study, while method of application of nitroxin showed no significant effect on the traits under study, the combined use of bio-fertilizer with N fertilizer, in addition to producing sufficient crop and improving nitrogen uptake efficiency, could reduce the use of nitrogen fertilizer by 25 percent.
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