تعیین شاخص های تنش خشکی برای گزینش تیمار کودی مناسب در زراعت ذرت علوفه ای
محورهای موضوعی : یافته های نوین کشاورزی
علیرضا دادیان
1
(عضو هیأت علمی گروه کشاورزی دانشگاه آزاد اسلامی واحد فراهان، فراهان-ایران)
کلید واژه: نیتروژن, کم آبیاری, نیتروکسین, ماکسیما,
چکیده مقاله :
به منظور بررسی تعیین شاخص های تنش خشکی برای بررسی تیمار کودی مناسب در گیاه ذرت علوفه ای، هیبرید ماکسیما آزمایش هایی جداگانه طی سالهای 1393 و 1394 در اراک انجام شد. این آزمایش به صورت اسپلیت اسپلیت پلات و در قالب طرح پایه بلوک های کامل تصادفی با چهار تکرار انجام شد. تیمارهای آزمایشی شامل آبیاری در دو سطح آبیاری کامل (I0) و کم آبیاری (I1) به عنوان عامل اصلی، نیتروکسین در سه سطح 0، 5/0 و 1 لیتر به ازاء هر 30 کیلوگرم بذر و نیتروژن در سه سطح 0، 125 و 250 کیلوگرم در هکتار بود که به عنوان عوامل فرعی در نظر گرفته شد. نتایج نشان داد از میان شاخص های مورد مطالعه,STI GMP و MP مناسب ترین شاخص ها برای تعیین تیمار کودی برتر، برای رسیدن به بالاترین مقدار عملکرد علوفه تولیدی در هر دو شرایط آبیاری مطلوب و اعمال تنش خشکی می باشد. با توجه به این که بیشترین مقدار عملکرد علوفه تحت هر دو شرایط آبیاری مطلوب و تنش خشکی از ترکیب تیماری مصرف 1 لیتر نیتروکسین به ازاء 30کیلوگرم بذر همراه با 250 کیلوگرم نیتروژن در هکتار (No2N2) به دست آمد، این تیمار به عنوان مطلوب ترین ترکیب تیماری گزینش شد.
In order to investigate drought indices used to identify the appropriate fertilizer treatments in forage corn, hybrid Maxima (Zea mays var maxima) Separate experiments were conducted during 2014 and 2015 in Arak. The experiment was a split-split plot in a randomized complete block design with four replications. Irrigation treatments consisted of two irrigation levels (I0) and deficit irrigation (I1) as the main factor, Nytroxin in three levels: 0, 0.5 and 1 ml per 30 kg of seed and nitrogen levels of 0, 125 and 250 kg per hectare, which was considered as a minor factor. The results shown that STI, GMP and MP most appropriate indicators to determine the best fertilizer treatments is applied, to achieve the highest production yield both normal irrigation and stress. The maximum yield under both traditional irrigation and drought conditions the treatment combination of 1 ml per 30 kg seed Nitroxin with 250 kg Nitrogen per hectare (No2N2), respectively, which was selected as the most favorable treatment combination.
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