عضئ هیأت علمی سازمان تحقیقات آموزش و ترویج کشاورزی، مؤسسه تحقیقات خرما و میوه های گرمسیری کشور
چکیده
تاریخ کاشت مناسب کلزا در شمال و جنوب خوزستان بهواسطه تناوب زراعی، شرایط آب، خاک و اقلیم بسیار محدود می‌باشد، لذا تعیین رابطه عملکرد و اجزای عملکرد کلزا با تاریخ کاشت بسیار ضروری است. این آزمایش به صورت کرت‌های یکبار خرد شده در قالب طرح بلوکهای کامل تصادفی با هفت تیمار، تاریخ کاشت در کرت‌های اصلی و دو رقم کلزا در کرت‌های فرعی طی دو سال زراعی اجرا گردید. نتایج نشان داد که تأخیر در کاشت کلزا سبب کاهش معنی‌دار عملکرد و اجزای عملکرد، درصد جوانهزنی، طول دوره گلدهی و رسیدگی، ارتفاع ساقه و افزایش معنی‌دار فاصله زمانی کاشت تا سبز شدن گردید. بین تاریخ کاشت با عملکرد و اجزای عملکرد کلزا همبستگی منفی و معنی‌داری در سطح احتمال 1% وجود داشت. در این تحقیق اول آبان ماه تاریخ کاشت مطلوب بوده و نتایج بهدست آمده روند نزولی عملکرد هیبرید Hyola401 و رقم آزاد گرده‌افشان RGS003 را در تاریخهای کاشت نامطلوب نشان داد. بر اساس نتایج این تحقیق، کاشت هیبرید Hyola401 از اول الی بیستم آبان ماه در اولویت اول و در صورت عدم امکان آن، کاشت رقم آزاد گرده‌افشان RGS003 در دامنه تاریخ کاشت اول الی آخر آبان ماه در خوزستان توصیه می‌شود.
Effect of sowing date on the yield and yield components of two canola cultivars in Khuzestan area
نویسندگان [English]
Abdol Amir Rahnama
Scientific Board of Iranian Date Palm and Tropical Fruits Research Institute, Agricultural Research, Education and
Extention Organization.
چکیده [English]
Optimal sowing date of canola is limited in south and north of Khuzestan province of Iran by rotation, water, soil and climate conditions and so determination of the relationship between yield and yield components with planting date is necessary. In order to determine the effect of sowing date on the yield and yield components of two canola cultivars, an experiment was carried out as split plot based on a randomize complete block design with four replications during 2004-2005. Seven planting dates were allocated to the main plots and two canola cultivars were arranged in subplots. Based on the results, delay in canola planting caused significant decrease in yield and yield components, seed germination percentage, flowering and maturity duration, plant stem height and significant increase of planting to emergence period. There was significant negative correlation between planting date and yield at %1 probability level. Optimal planting date was October 22 and results revealed decreasing trend in Hyola401 hybrid and RGS003 cultivar yield in non optimal planting dates. In conclution, planting Hyola401 during October 22 to November 12 was recommended and if it was not possible, RGS003 planting during October 22 to Novemer 22 could be advisable.
کلیدواژه‌ها [English]
Canola, Delay in planting, Planting date, yield, Yield components
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