اثرات کاربرد نیتروکسین بر خصوصیات فیزیولوژیک ارقام ارزن علوفه ای در شرایط قطع آبیاری
محورهای موضوعی : یافته های نوین کشاورزیمحمد دربانی 1 , جعفر مسعود سینکی 2 , علیرضا دشتبان 3
1 - دانشجوی کارشناسی ارشد زراعت دانشگاه آزاد اسلامی واحد دامغان، دامغان
2 - گروه کشاورزی دانشگاه آزاد اسلامی واحد دامغان، دامغان، ایران
3 - گروه کشاورزی دانشگاه آزاد اسلامی واحد دامغان، دامغان، ایران
کلید واژه: صفات فیزیولوژیک, فنولوژی, ارزن, کود نیتروکسین,
چکیده مقاله :
به منظور بررسی اثرات کود نیتروکسین تحت شرایط قطع آبیاری (بر اساس BBCH، مراحل فنولوژی گیاهان) بر صفات فیزیولوژیک ارقام ارزن علوفه ای در دامغان در سال زراعی 92 -91 آزمایشی به صورت اسپیلت پلات فاکتوریل در قالب طرح بلوک های کامل تصادفی اجراء شد. تیمارها شامل سه سطح آبیاری، شاهد (آبیاری کامل)، قطع آبیاری در ابتدای گلدهی و قطع آب در انتهای گلدهی در کرت های اصلی و استفاده از کود نیتروکسین(+) و عدم استفاده از کود نیتروکسین(شاهد) و همچنین ارقام ارزن علوفه ای (باستان، پیشاهنگ و اصفهان) در کرت های فرعی قرار داشتند. نتایج نشان داد که حداکثر پروتئین در ارقام اصفهان و پیشاهنگ به ترتیب 31/24% و 19/24% و بیشترین مقدار فیبر در مرحله قطع آب (61BBCH ) با 17/74% و بیشترین مقدار علوفه تر در تیمار شاهد و رقم باستان با 43/88 تن در هکتار به دست آمد. بیشترین وزن خشک اندام هوایی تحت اثرات سه عاملی کود*رقم*آبیاری، با 27/15 گرم بر متر مربع و بالاترین ارتفاع تحت تاثیر اثرات 2 عاملی رقم*کود نیتروکسین با 27/148 سانتی متر مشاهده شد. رشد بسیار سریع ارزن و کوتاه بودن طول دوره رویش و متحمل بودن این گیاه به خشکی و نیز منحصر بفرد بودن آن از لحاظ زمان برداشت و نیز پاسخ مثبت آن به کود نیتروکسین می تواند باعث توسعه زراعت آن در مناطق خشک و نیمه خشک ایران شود.
A split-plot factorial experiment using the randomized complete block design was conducted on physiological characteristics of forage millet cultivars in Damghan in the cropping year 2012-2013 to study the effects of Nitroxin fertilizer under irrigation cessation conditions (based on BBCH, or the phenological stages of plants). The treatments included three levels of irrigation (control with complete irrigation, irrigation cessation at the start of the flowering phase, and irrigation cessation at the completion of the flowering phase) in the main plots, and Nitroxin application (+) and no Nitroxin application (control) and forage millet cultivars (Bastan, Pishahang, and Isfahan) in the subplots. Results showed the maximum protein contents belonged to the Isfahan and Pishahang cultivars with 24.31 and 24.10%, respectively, and the largest fiber contents to the control treatment and to the Bastan cultivar at 88.43 t/ha. The maximum dry weight of aerial parts under the triple interaction effect of fertilizer * cultivar *irrigation was 15.27 g/m2, and the maximum plant height under the mutual effects of cultivar * Nitroxin fertilizer 148.27 cm. The very rapid growth of millet, its short growing season and drought tolerance, its uniqueness with regard to harvest time, and its positive response to Nitroxin application can help to expand millet cultivation in the arid and semi-arid regions of Iran
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