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به زراعی کشاورزی | ||
مقاله 8، دوره 24، شماره 3، مهر 1401، صفحه 825-840 اصل مقاله (634.91 K) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22059/jci.2022.327287.2584 | ||
نویسندگان | ||
حمیدرضا سارلی* 1؛ عباس بیابانی2؛ حسین صبوری2؛ رحمت اله محمدی گنبد3 | ||
1دانشجوی دکتری، گروه تولیدات گیاهی، دانشکده علوم کشاورزی و منابع طبیعی، دانشگاه گنبدکاووس، گنبدکاووس، ایران. | ||
2دانشیار، گروه تولیدات گیاهی، دانشکده علوم کشاورزی و منابع طبیعی، دانشگاه گنبدکاووس، گنبدکاووس، ایران. | ||
3محقق، بخش تحقیقات علوم زراعی- باغی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان گلستان، سازمان تحقیقات، آموزش و ترویج کشاورزی، گرگان، ایران. | ||
چکیده | ||
این آزمایش بهمنظور مطالعه تأثیر تراکم بذر در زمان کاشت و مقادیر مختلف کاربرد کود نیتروژن بر شاخصهای انتقال مجدد گندم (رقم قابوس) در مزرعه ایستگاه تحقیقات کشاورزی و منابع طبیعی گنبدکاووس بهمدت دو سال (98-1397 و 1399-1398) در سه تکرار و بهصورت اسپلیت-پلات در قالب طرح بلوکهای کامل تصادفی انجام شد. در کرتهای اصلی، سطوح نیتروژن خالص شامل صفر (شاهد)، 46، 92 و 138 کیلوگرم در هکتار از منبع اوره و در کرتهای فرعی، تراکم کاشت در شش سطح (150، 225، 300، 375، 450 و 525 بذر در هر مترمربع) قرار گرفت. جهت مطالعه فرایند انتقال مجدد مواد فتوسنتزی به دانه، انتقال مواد فتوسنتزی به تفکیک از برگها، ساقه اصلی (بدون برگ) و اجزای سنبله بدون دانه بررسی شدند. نتایج نشان داد که از نظر درصد نیتروژن دانه و صفات انتقال مجدد گندم اختلاف معنیداری بین تیمارهای تراکم کاشت، کود نیتروژن و اثر متقابل تراکم کاشت× کود وجود داشت. بالاترین درصد نیتروژن دانه (87/1 درصد) در تیمار 138 کیلوگرم در هکتار نیتروژن و 450 بذر در مترمربع حاصل شد. در سال اول، بالاترین انتقال مجدد از گیاه (528/0 گرم در گیاه) در تیمار 92 کیلوگرم در هکتار نیتروژن و 375 بذر در مترمربع و در سال دوم، در تیمار شاهد، بالاترین میزان انتقال مجدد (345/0 گرم در گیاه)، در تراکم کاشت 300 بذر در مترمربع مشاهده شد و پس از آن با افزایش تراکم کاشت، از میزان انتقال مجدد کاسته شد. | ||
کلیدواژهها | ||
درصد نیتروژن دانه؛ سهم انتقال مجدد؛ شاخص برداشت نیتروژن؛ کارایی انتقال مجدد؛ میزان انتقال مجدد | ||
عنوان مقاله [English] | ||
Evaluation of Remobilization Indices in Wheat as Affected by Planting Density and Amounts of Nitrogen Fertilizer | ||
نویسندگان [English] | ||
Hamidreza Sarli1؛ Abbas Biabani2؛ Hossein Sabouri2؛ Rahmatolah Mohammadi3 | ||
1Ph.D. Student, Department of Plant Production, Faculty of Agricultural Sciences and Natural Resources, Gonbad Kavous University, Gonbad Kavous, Iran. | ||
2Associate Professor, Department of Plant Production, Faculty of Agricultural Sciences and Natural Resources, Gonbad Kavous University, Gonbad Kavous, Iran. | ||
3Researcher, Horticulture-Crops Research Department, Golestan Agricultural and Natural Resources Research and Education Centre, AREEO, Gorgan, Iran. | ||
چکیده [English] | ||
This experiment has been performed to study the effect of seed sowing density and different amounts of nitrogen fertilizer application on the remobilization indices in wheat (Qaboos cultivar) in the field of Gonbad Kavous Agricultural and Natural Resources Research Station in two years (2018-19 and 2019-20) in three replications and as a split-plot in a randomized complete block design. The main plots include pure nitrogen at four levels, i.e., 0 (control), 46, 92, and 138 kg/ha of nitrogen from urea fertilizer source), and the subplots are planting density at six levels (150, 225, 300, 375, 450, and 525 seed/m2). The remobilization photosynthetic assimilate separately from leaves, main stem (without leaves), and seedless spike components are examined to study the process of photosynthetic material transfer to seed. Results show that there has been significant differences among planting density, nitrogen fertilizer, and interaction of planting density× fertilizer treatments in terms of grain nitrogen percentage and remobilization traits of wheat. The highest percentage of grain nitrogen (1.87%) has been obtained in the treatment of 138 kg/ha nitrogen and 450 seed/m2. In the first year, the highest remobilization from the plant is observed in the treatment of 92 kg/ha nitrogen and 375 seeds/m2 (0.528 gr/plant), and in the second year, in the control, the highest remobilization is observed in the planting density of 300 seeds/m2 (0.345 gr/plant), and then with increasing planting density, the remobilization from the plant is reduced. | ||
کلیدواژهها [English] | ||
Contribution of remobilization, Nitrogen harvest index, Remobilization, Seed nitrogen, The efficiency of remobilization | ||
مراجع | ||
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