اثر میزان بذر بر عملکرد دانه و اجزای عملکرد برنج رقم هاشمی در انواع روش‌های کاشت مستقیم

نویسندگان

مؤسسه تحقیقات برنج کشور، رشت

چکیده

اثر میزان بذر بر عملکرد دانه و اجزای عملکرد برنج رقم هاشمی در انواع روش‌های کاشت مستقیم در آزمایشی به‌ صورت کرت‌های خرد شده در قالب طرح بلوک‌های کامل تصادفی با سه تکرار و سه روش کاشت به عنوان کرت‌های اصلی و سه میزان بذر 60، 80 و 100 کیلوگرم در هکتار به عنوان کرت‌های فرعی در موسسه تحقیقات برنج کشور (رشت) طی دو سال (1389 و 1390) مورد ارزیابی قرار گرفت. روش‌های کاشت شامل کشت ردیفی، کپه‌ای و دست‌پاش بذر جوانه‌دار شده در بستر گِلخراب بودند. بر اساس نتایج آزمایش، بیشترین ارتفاع بوته (0/131 سانتی‌متر)، تعداد خوشه (235 خوشه در مترمربع)، عملکرد دانه (2753 کیلوگرم در هکتار)، شاخص قدرت مخزن (2/132 سانتی‌متر)، سرعت تشکیل عملکرد (7/29 کیلوگرم روز)، راندمان تبدیل (0/68 درصد) و میزان برنج سالم (0/59 درصد) از روش کاشت کپه‌ای به دست آمد. بیشترین تعداد خوشه (243 خوشه در مترمربع)، عملکرد دانه (2486 کیلوگرم در هکتار) و سرعت تشکیل عملکرد (5/26 کیلوگرم روز) از میزان بذر 100 کیلوگرم در هکتار به دست آمد. بر اساس نتایج این تحقیق به نظر می‌رسد که با استفاده از روش کاشت مستقیم بذر جوانه‌دار شده به صورت کپه‌ای در بستر مرطوب و میزان بذر 100 کیلوگرم در هکتار، می‌توان عملکرد دانه قابل قبولی در زراعت برنج رقم هاشمی در شرایط اقلیمی منطقه مورد آزمایش به دست آورد.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of Seed Rate on Grain Yield and Yield Components of Rice (cv. Hashemi) in Direct Seeding Methods

نویسندگان [English]

  • N. Gholami Rezvani
  • M. Esfahani
  • Sh. Kaabi Rahnama
  • A. Aalami
  • M. Nahvi
چکیده [English]

The effect of seed rate on grain yield and yield components of rice (cv. Hashemi) in direct seeding methods was evaluated in a split plot lay out based on randomized complete block design with three replication and three seeding methods as main plots and three seeding rates (60, 80 and 100 kgha-1) as sub plots at Rice Research Institute of Iran, Rasht in 2010 and 2011. Seeding methods consisted of drum direct seeding, hill wet seeding, broadcasting and pre-geminated seeding in puddle field. Results indicated that, the maximum plant height (131.0 cm), number of productive panicles (235 panicles m-2 ), grain yield (2753 kgha-1), Sink strength index (132.2 cm), yield formation rate (29.7 kg day-1), milling recovery (68.0%) and head rice (59.0%) were obtained in hill wet seeding method. The maximum number of productive panicles (243 panicles m-2), grain yield (2486 kgha-1), and yield formation rate (26.5 kg day-1) were obtained in in 100 kgha-1. As the results indicate, it seems that, it is possible to obtain an acceptable grain yield in Hashemi rice cultivar using direct seeding with hill wet direct seeding method in puddle field and seeding rate 100 kgha-1 in climatic continental of the experimental region.

کلیدواژه‌ها [English]

  • rice
  • direct seeding
  • yield formation rate
  • sink strength index
  • milling recovery
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