اثر محلول‌پاشی اوره بر پروتئین دانه و انتقال مجدد نیتروژن در اکوتیپ‌های گندم سرداری در دو شرایط دیم و آبی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش‌آموخته کارشناسی ارشد، گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه کردستان، سنندج، ایران

2 دانشیار، گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه کردستان، سنندج، ایران

3 مربی، بخش غلات مؤسسه تحقیقات کشاورزی دیم کشور، معاونت سرارود، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرمانشاه، ایران

4 دانشیار، بخش چغندرقند، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان کرمانشاه، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرمانشاه، ایران

چکیده

تغذیه صحیح گیاه یکی از عوامل مهم در بهبود عملکرد و کیفیت محصول به ‌شمار می‌آید. برای رسیدن به این هدف، اثر محلول‌پاشی اوره بر پروتئین دانه و انتقال مجدد نیتروژن در اکوتیپ‌های گندم سرداری آزمایشی به‌‌صورت کرت‌های خرد شده در قالب طرح بلوک‌های کامل تصادفی در دو شرایط دیم و آبی در سال زراعی 1393-1392 در مزرعه تحقیقاتی کرمانشاه واقع در شهرستان اسلام‌‌آباد غرب اجرا گردید. تیمارهای آزمایش عبارت بودند از: محلول‌پاشی با کود اوره در کرت‌های اصلی در سه سطح شامل: شاهد، محلول‌پاشی در زمان ظهور سنبله و در زمان گل‌دهی و رقم گندم در کرت‌های فرعی در چهارده سطح (شامل 12 اکوتیپ سرداری به‌همراه دو رقم آذر-2 و ریژاو به ‌‌عنوان شاهدهای آزمایش). نتایج تجزیه واریانس و مقایسه میانگین بین تیمارهای محلول‌پاشی در هر دو شرایط دیم و آبی نشان داد که پروتئین دانه، سختی دانه، عدد زلنی، گلوتن دانه، نیتروژن دانه، انتقال مجدد نیتروژن اندام‌های هوایی در مرحله گل‌دهی، کارایی انتقال مجدد نیتروژن دانه و سهم انتقال مجدد نیتروژن دانه در هر دو مرحله ظهور سنبله و گل‌دهی با کاربرد کود اوره به‌صورت محلول‌پاشی افزایش یافت. بیش‌ترین میزان افزایش پروتئین دانه مربوط به محلول‌پاشی در مرحله گل‌دهی بود،. کارایی انتقال مجدد نیتروژن در شرایط دیم از 31/54 تا 73/62 درصد برای اکوتیپ‌های صوفیان و قطره زمین و در شرایط آبیاری از 24/32 تا 52/49 درصد برای اکوتیپ تودار و رقم ریژاو متغیر بود. در هر دو شرایط دیم و آبی تیمار محلول‌پاشی در مرحله گل‌دهی بیش‌ترین و شاهد کم‌ترین سهم انتقال مجدد نیتروژن به دانه را داشتند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

The Effect of Urea Foliar Application on Grain Protein and Nitrogen Remobilization in Sardari Wheat Ecotypes in Both Rainfed and Irrigated Conditions

نویسندگان [English]

  • Barzan Rajabi 1
  • Adel Siosemardeh 2
  • Rahman Rajabi 3
  • Ali Jaliliyan 4
1 MSc Graudate, Department of Agriculture and Plant Breeding, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran
2 Associate Professor, Department of Agriculture and Plant Breeding, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran
3 Instructor, Cereal Research Department of Dryland Agricultural Research Sub-Institute, Agriculture Research, Education and Extension Organization (AREEO), Kermanshah, Iran
4 Associate Professor, Sugar Beet Research Department, Kermanshah Agricultural and Natural Resources Research and Education center (AREEO), Kermanshah, Iran
چکیده [English]

Proper nutrition of the plant is one of the important factors in improving the yield and quality of the product. In plant nutrition, each element must be sufficiently available to the plant at different stages of development. To achieve this goal, the effect of urea foliar application on grain protein and nitrogen remobilization in experimental Sardari wheat ecotypes in the form of split plots in a randomized complete block design in both rainfed and irrigated conditions in 2013-2014 crop year in Kermanshah research farm located in The city of Islamabad-e-Gharb was implemented. Experimental treatments were: foliar application of urea fertilizer application in Three levels including: control, fertilization in Heading, and Flowering as main plot and cultivar as sub-plot in fourteen levels (including 12 Sardari ecotypes along with Azar-2 and Rijaw cultivars as controls). The results of analysis of variance and mean comparison between foliar spraying treatments in both rainfed and irrigated conditions showed that grain protein, grain hardness, zeleny number, grain gluten, grain nitrogen, nitrogen remobilization in flowering stage, nitrogen transfer remobilization efficiency and nitrogen remobilization contribution. Grain nitrogen remobilization was increased by foliar application at both stages of Heading and flowering using urea fertilizer. The highest increase in grain protein was related to foliar application at flowering stage. Also, grain hardness increased due to nitrogen foliar application at Heading and flowering stage. In this study, nitrogen remobilization efficiency in rainfed conditions ranged from 54.31 to 62.73% for Sufi ecotypes and land drops and in irrigation conditions ranged from 32.24 to 49.52% for Tudar ecotype and Rijaw cultivar. In both rainfed and irrigated conditions, foliar application at flowering stage had the highest and control (without foliar application) had the lowest share of nitrogen remobilization to seed.

کلیدواژه‌ها [English]

  • Nitrogen
  • Remobilization
  • Grain gluten
  • Zeleny number
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