پاسخ خصوصیات زراعی گلرنگ (Carthamus tinctorius L.) به زمان، مقدار و روش مصرف نیتروژن

نوع مقاله: علمی پژوهشی

نویسنده

1- استادیار گروه کشاورزی، واحد فراهان، دانشگاه آزاداسلامی، فراهان، ایران

چکیده

جهت بررسی تأثیر واکنش خصوصیات زراعی گلرنگ پاییزه به زمان، مقدار و روش مصرف نیتروژن این آزمایش در سال زراعی 90-1389 در مزرعه آموزشی دانشگاه پیام نور استان مرکزی به­صورت فاکتوریل در قالب طرح پایه بلوک­های کامل تصادفی با سه تکرار انجام شد. تیمار زمان مصرف کود اوره در سه سطح شامل (مصرف نصف کود در زمان کاشت + مصرف نصف کود در مرحله روزت)، (مصرف نصف کود در مرحله روزت + مصرف نصف کود در زمان ساقه دهی)، (مصرف نصف کود در زمان ساقه دهی + مصرف نصف کود در زمان غوزه­دهی)، تیمار مقدار مصرف کود اوره در دو سطح شامل (مصرف 150 و 300 کیلوگرم در هکتار) و تیمار روش مصرف کود اوره نیز در سه سطح (خاک مصرف، آب مصرف و روش محلول­پاشی) بود. نتایج نشان داد که اثر تیمار زمان مصرف کود اوره بر صفات ارتفاع شاخه­دهی، تعداد شاخه فرعی فرعی، تعداد دانه در متر مربع، تعداد دانه در گیاه، عملکرد بیولوژیکی غوزه، وزن دانه­های غوزه و شاخص برداشت غوزه معنی­دار بود. اثر تیمار مقدار مصرف نیتروژن نیز بر صفات ارتفاع شاخه­دهی، تعداد شاخه فرعی فرعی، تعداد دانه در متر مربع، تعداد دانه در گیاه، عملکرد بیولوژیکی غوزه، شاخص برداشت غوزه و کارآیی مصرف نیتروژن معنی­دار بود. همچنین، تأثیر روش مصرف کود اوره بر صفات ارتفاع شاخه­دهی، تعداد شاخه فرعی فرعی، تعداد دانه در متر مربع، تعداد دانه در گیاه، عملکرد بیولوژیکی غوزه، عملکرد دانه غوزه­ها و کارآیی مصرف نیتروژن معنی­دار بود. تیمار محلول­پاشی کود اوره با میانگین 27/63 کیلوگرم بر کیلوگرم و تیمار خاک مصرف کود اوره با میانگین 86/6 کیلوگرم بر کیلوگرم به­ترتیب بیشترین و کمترین میزان کارآیی مصرف کود را داشتند. بنابراین، به نظر می­رسد که کاربرد روش محلول­پاشی کود اوره علاوه بر کاهش مصرف کود و کاهش آلودگی زیست محیطی، موجب افزایش کارایی مصرف کود اوره تا 27/63 کیلوگرم بر کیلوگرم می­گردد. 

کلیدواژه‌ها


عنوان مقاله [English]

Response of Safflower (Carthamus tinctorius L.) Agronomic Characteristics to Time, Rate and Methods of Nitrogen Applications

نویسنده [English]

  • MOHAMMAD MIRZAKHANI
1- Assistant Prof. Department of Agriculture, Farahan Branch, Islamic Azad University, Farahan, Iran
چکیده [English]

To investigate the response of safflower agronomic characteristics to time, rate and method of nitrogen applications, an experiment was carried out at the research Field of Payaam Nour Arak University in Markazi province during 2011. A factorial arrangement of treatment in a randomized complete block design with three replications was used. Time of nitrogen treatment was with three levels (half in planting date + half in rosette stage), (half in rosette stage + half in stem elongation) and (half in stem elongation + half in boll forming stage), urea application was two levels (150 and 300 kg.ha-1) and method of application was with three levels (mixed with soil, used in irrigation water and foliar application). Each plot consisted of 4 rows, 5 m long with 50 cm between rows and 5 cm between plants on the rows. Results indicated that the effect of application time on the characteristics like: height of branch, number of sub-branches, number of seeds per m-2, number of seeds per plant, biological yield of bolls, seed yield of bolls, harvest index of bolls were significant. The effect of nitrogen treatment rates on branch height, number of sub-branches, number of seeds per m-2, number of seeds per plant, biological yield of boll, harvest index of boll, and nitrogen use efficiency were also significant. Mean nitrogen use efficiencies for foliar application was 63.27% and for soil mixed application was 6.86%. Thus, it seems that foliar application of urea not only decreases environmental but also increases nitrogen use efficiency.

کلیدواژه‌ها [English]

  • harvest index
  • Method of consumption
  • Nitrogen use efficiency
  • Safflower
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