ارزیابی توان رقابتی سه رقم برنج (Oryza sativa L.) در تراکم‌های مختلف علف‌هرز سوروف (Echinochloa crus-galli L.)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش آموخته کارشناسی ارشد زراعت، گروه زراعت، دانشکده علوم زراعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری

2 دانشگاه علوم کشاورزی و منابع طبیعی ساری

3 کارشناس آموزشی گروه زراعت، دانشکده علوم زراعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری

چکیده

این پژوهش به منظور بررسی پاسخ سه رقم برنج در رقابت با تراکم‌های علف‏هرز سوروف و انتخاب رقم مناسب با قابلیت رقابت بالاتر انجام شد. آزمایش به صورت فاکتوریل در قالب بلوکهای کامل تصادفی در سه تکرار در شهرستان بابل انجام شد. فاکتورها شامل سه رقم برنج (طارم هاشمی، فجر و ندا) و پنج تراکم سوروف (صفر، 10، 20، 30 و 40 بوته در متر مربع) بودند. نتایج آزمایش نشان داد که زیست توده بوته سوروف و عملکرد دانه (شلتوک) برنج تنها تحت تاثیر اثرات ساده رقم و تراکم علف هرز سوروف قرار گرفتند. زیست توده سوروف در ارقام فجر و ندا، به‌ترتیب 28 و 35 درصد نسبت به رقم طارم هاشمی کاهش نشان داد. مقدار زیست توده سوروف در تراکم‌های 20، 30 و 40 بوته نسبت به تراکم 10 بوته در متر مربع سوروف، به‌ترتیب 18، 49 و 67 درصد افزایش نشان داد. بیشترین و کمترین عملکرد دانه برنج به‌ترتیب در ارقام ندا (779 گرم بر متر مربع) و طارم هاشمی (297 گرم بر متر مربع) بدست آمد. مقدار افزایش عملکرد دانه در ارقام فجر و ندا نسبت به رقم طارم هاشمی، به‌ترتیب 133 و 162 درصد بود. همچنین میزان کاهش عملکرد دانه برنج در تراکمهای 10، 20، 30 و 40 بوته در متر مربع سوروف نسبت به عدم تداخل سوروف (493 گرم بر متر مربع)، به‌ترتیب 2، 8، 12 و 24 درصد بود.

کلیدواژه‌ها

عنوان مقاله [English]

Evaluation of competitive ability for three rice (Oryza sativa L.) cultivars in different barnyard grass (Echinochloa crus-galli L.) densities

نویسندگان [English]

  • Mehdi Alizadeh Afrozi 1
  • Rahmat Abbasi 2
  • Seyyed Yousef Mousavi Toghani 3
1 Graduated Student, Department of Agronomy, Sari University of Agricultural Sciences and Natural Resources, Sari, Iran
2 عضو هیات علمی
3 Educational Expert., Department of Agronomy, Sari University of Agricultural Sciences and Natural Resources, Sari, Iran.
چکیده [English]

This study was performed to investigate the response of three rice cultivars in competition with barnyard grass densities and to select a suitable cultivar with the ability to more competitive. The experiment was conducted as a factorial arrangement based on randomized complete block design (RCBD) with three replications in Babol, Iran, in 2018. Factors included rice cultivar (Tarom Hashemi, Fajr, and Neda) and barnyard grass density (0, 10, 20, 30, and 40 plants m-2). The results showed that the Biomass of barnyard grass and rice yield were affected only by the simple effects of rice cultivar and barnyard grass density. The Biomass of barnyard grass in Fajr and Neda cultivars compared to the Tarom Hashemi cultivar decreased by 28 and 35%, respectively. The amount of barnyard grass biomass increased by 18, 49 and 67% at densities of 20, 30 and 40 plants compared to the density of 10 plants m-2 of barnyard grass. The highest and lowest rice grain yield was obtained in Neda (779 g m-2) and Tarom Hashemi (297 g m-2) cultivars, respectively. The amount of increase in rice grain yield in Fajr and Neda varieties compared to Tarom Hashemi cultivar was 133 and 162%, respectively. Also, grain yield decreased up to 2, 7, 12, and 24%, respectively, at 10, 20, 30, and 40 barnyard grass m-2 with 493 g m-2.

کلیدواژه‌ها [English]

  • Barnyardgrass
  • Competition
  • Density
  • Dry weight
  • Grain yield

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دانش کشاورزی وتولید پایدار
دوره 33، شماره 1
اردیبهشت 1402
صفحه 319-329

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