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اثر تنش خشکی و کشت تأخیری بر عملکرد دانه، روغن و ترکیب اسیدهای چرب ارقام کلزا | ||
دانش کشاورزی وتولید پایدار | ||
مقاله 10، دوره 29، شماره 2، تیر 1398، صفحه 135-151 اصل مقاله (799.73 K) | ||
نوع مقاله: مقاله پژوهشی | ||
نویسندگان | ||
لعیا مراد بیگی* 1؛ احمد غلامی2؛ امیرحسین شیرانی راد3؛ حمید عباسدخت2؛ حمیدرضا اصغری2 | ||
1گروه زراعت، دانشگاه صنعتی شاهرود | ||
2دانشگاه صنعتی شاهرود | ||
3مؤسسه تحقیقات اصلاح و تهیه نهال و بذر، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج، ایران | ||
چکیده | ||
به منظور بررسی اثر تنش خشکی و کشت تأخیری بر عملکرد دانه، روغن و ترکیب اسیدهای چرب دانه در ارقام پاییزه کلزا، آزمایشی به صورت فاکتوریل اسپلیت پلات در قالب طرح بلوکهای کامل تصادفی با سه تکرار در دو سال زراعی 95-1393 در مزرعه تحقیقاتی موسسه تحقیقات اصلاح و تهیه نهال و بذر کرج اجرا گردید. تیمارهای مورد بررسی شامل تاریخ کاشت در دو سطح شامل20 مهر (کشت معمول) و 5 آبان (کشت تأخیری)، آبیاری در دو سطح شامل آبیاری کامل (شاهد) و تنش خشکی (قطع آبیاری از مرحله خورجیندهی) و نیز ارقام و هیبریدهای پاییزه کلزا شامل Neptune, Elvise, Okapi, Tassilo, GKH0224, GKH2624, GKH3705 بودند. نتایج نشان داد که با قطع آبیاری در مرحله خورجیندهی، عملکرد دانه، عملکرد روغن، تعداد دانه در خورجین، تعداد خورجین در بوته، محتوای کلروفیل، میزان اولئیکاسید و لینولئیکاسید کاهش ولی میزان اسید چرب اروسیک واسیدپالمتیک افزایش یافت. بیشترین عملکرد دانه (5354 کیلوگرم در هکتار) و عملکرد روغن (2443 کیلوگرم در هکتار) در شرایط آبیاری کامل و تاریخ کاشت معمول و کمترین در شرایط قطع آبیاری در مرحله خورجیندهی و کشت تأخیری بهدست آمد. بیشترین میزان اسیدپالمتیک در کشت تأخیری در رقم GKH3705 در شرایط قطع آبیاری در مرحله خورجیندهی و کمترین آن در تاریخ کاشت معمول، رقم Neptune در شرایط آبیاری کامل بهدست آمد. از نظر تعداد دانه در خورجین، عملکرد روغن، میزان اسیدهای چرب اولئیک و لینولئیک و محتوای کلروفیل، رقم GKH3705 مناسبترین رقم بود. با توجه به نتایج، در تاریخ کاشت تأخیری، رقم GKH3705 در شرایط آبیاری کامل و تنش خشکی توصیه می شود. | ||
کلیدواژهها | ||
اروسیک اسید؛ تاریخ کاشت؛ عملکرد؛ قطع آبیاری؛ لینولئیک اسید | ||
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