اثر تنش کم آبی بر عملکرد کلزای بهاره

نویسندگان

1 دانشجوی سابق کارشناسی ارشد، گروه علوم زراعی و اصلاح نباتات، پردیس ابوریحان، دانشگاه تهران، تهران

2 دانشیار، گروه علوم زراعی و اصلاح نباتات، پردیس ابوریحان، دانشگاه تهران، تهران

3 استادیار پژوهشی، مؤسسه تحقیقات اصلاح و تهیه نهال و بذر کرج، البرز

4 استادیار، گروه علوم زراعی و اصلاح نباتات، پردیس ابوریحان، دانشگاه تهران، تهران

5 دانشجوی دکترای اکولوژی گیاهان زراعی، گروه علوم زراعی و اصلاح نباتات، پردیس ابوریحان، دانشگاه تهران، تهران

چکیده

به منظور بررسی اثر تنش آبیاری در مرحله گل دهی بر شاخص های زراعی کلزا و نیز شناسایی ارقام مقاوم و حساس به خشکی، در سال 1385 یک آزمایش مزرعه ای در مؤسسه تحقیقات اصلاح و تهیه نهال و بذر کرج به صورت کرت های خرد شده در قالب طرح بلوک های کامل تصادفی با چهار تکرار اجرا شد. آبیاری به عنوان عامل اصلی در دو سطح آبیاری معمولی یا شاهد (براساس 80 میلی متر تبخیر از تشتک کلاس A) و تنش کم آبیاری (قطع آبیاری از مرحله گل دهی به بعد) و 12 رقم کلزا، به عنوان عامل فرعی درنظر گرفته شد. نتایج نشان داد که بیشترین میانگین های شاخص برداشت (9/29 درصد) و عملکرد (3228 کیلوگرم در هکتار) مربوط به رقم RG 4403 بود. در شرایط تنش، وزن هزار دانه و درصد روغن رقم 19-H بیشترین بود. همچنین با مقایسه شاخص های مقاومت به خشکی، رقم RG 4403 مقاوم ترین رقم بود. در شرایط تنش، عملکرد و اجزای عملکرد دو رقم Sarigol وHyola 330 کمترین مقدار و ORS 3150-3006 حساس ترین رقم به تنش خشکی بود.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of water deficit stress on yield performance of spring canola

نویسندگان [English]

  • Zinat Hajihashemi 1
  • Gholam Abbas Akbari 2
  • Amir Hossein Shirani rad 3
  • Reza Amiri 4
  • Shahryar Dashti 5
چکیده [English]

In order to study the effect of drought stress in terminal growth period on agronomical and physiological characteristics of canola (Brassica napus L.) cultivars, a field experiment was conducted using split-plot layout based on randomized complete blocks design with four replications at experimental field of Seed and Plant Improvement Institute, Karaj in 2006. There were two factors, including irrigation at two levels (irrigation after 80 mm evaporation from class “A” pan as control and drought stress from flowering stage until physiological maturity) as main plots. In addition, twelve spring cultivars: (RGS003, Sarigol, Hyola401, Hyola 60, Hyola 330, Kimberly, 19-H, PR-401/16, PP-308/8, ORS 3150-3006, RG 4403, and RGAS 0324) were applied in sub plots. Results showed that RG 4403 had maximum grain yield (3228 Kg/ha) and harvest index (29.9%). In drought stress conditions, best cultivar in grain yield, 1000-seeds weight and oil yield was 19-H and with comparison of stress tolerance indices had better compatibility to water stress. Sarigol and Hyola330 had the lowest yield and yield components and ORS3150-3006 was the most sensitive to water stress.

کلیدواژه‌ها [English]

  • Oil percent
  • Spring canola cultivars
  • Stress tolerance indices
  • water deficit stress
  • Yield and Yield components

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