اثر محلول پاشی سیلیکات کلسیم بر مقاومت به تنش شوری در دو رقم کلزا

نوع مقاله: مقاله پژوهشی

نویسنده

دانشیار، گروه کشاورزی، دانشگاه پیام نور، تهران، ایران

چکیده

هدف از پژوهش حاضر، بررسی اثرات محلول‌پاشی سطوح مختلف سیلیکات کلسیم بر عملکرد و اجزاء عملکرد دو رقم از گیاه کلزا می‌باشد. بر همین اساس، آزمایشی به‌صورت فاکتوریل در قالب طرح بلوک‌های کامل تصادفی در سه تکرار در مزارع تحقیقاتی دانشکده کشاورزی دانشگاه تربیت مدرس در سال زراعی 97-1396 اجرا شد. تیمارهای آزمایشی شامل 3 سطح تنش شوری (شاهد، شوری 5 و 10 دسی‌زیمنس بر متر) و دو سطح سیلیکات کلسیم (شاهد و محلول‌پاشی 8 کیلوگرم در هکتار) بودند. صفات وزن خشک گیاه، عملکرد دانه، اجزای عملکرد دانه، شاخص برداشت، عملکرد روغن و درصد روغن مورد ارزیابی قرار گرفتند. نتایج نشان داد محلول‌پاشی سیلیکات کلسیم، اثرات مثبتی بر صفات مورد بررسی در هر دو رقم زرفام و ساری‌گل داشت و سبب افزایش عملکرد در گیاه کلزا شد. از طرفی، مشاهده شد که رقم ساری‌گل در مقایسه با رقم زرفام، تعداد خورجین، تعداد دانه در خورجین، وزن هزار دانه، شاخص برداشت، درصد روغن، عملکرد روغن و شاخص سبزینگی بیشتری داشت ولی رقم زرفام دارای حداکثر وزن خشک گیاه بود. به‌علاوه، مشاهده شد که اعمال تنش شوری در سطوح 5 و 10 دسی‌زیمنس بر متر، اثر منفی بر تمامی صفات مورد بررسی داشت. به‌طور کلی، در پژوهش حاضر، تنش شوری سبب کاهش عملکرد و اجزای عملکرد کلزا شد و کاربرد سیلیکات کلسیم اثرات منفی ناشی از تنش شوری را در هر دو رقم زرفام و ساری‌گل کاهش داد و رقم ساری‌گل در مقایسه با رقم زرفام در اثر سیلیکات کلسیم مقاومت بیشتری نسبت به تنش شوری نشان داد.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of foliar application of Calcium Silicate on Salt Stress Tolerance of Two Canola (Brassica napus L.) Varieties

نویسنده [English]

  • Kamal Sadat Asilan
Associate Professor, Department of Agricultue, Payame Noor University, Tehran, Iran
چکیده [English]

A factorial experiment was conducted in a randomized complete block design with three replications at research fields of Faculty of Agriculture of Tarbiat Modares University, during 2017-2018 growing season. Treatments consisted of three different levels of salinity stress (control), salinity of 5 and 10 dS.m-1) and two levels of calcium silicate (control and foliar application of 8 kg.ha-1) which salinity stress was applied from the beginning of flowering and the calcium silicate was applied at flowering time, and dry weight of the plant, grain yield, yield components, harvest index, oil yield, oil percentage and greenness were evaluated. Foliar application of calcium silicate had positive effects on the all of the traits in both Zarfam and Sarigol cultivars and it increased yield in rapeseed. On the other hand, it was observed that Sarigol had a higher amount in number of pods, number of seeds per pod, 1000 grain weight, harvest index, oil percentage, oil yield and greenness index than the Zarfam. Zarfam had the maximum plant dry weight. In addition, it was observed that salinity stress at 5 and 10 dS.m-1 had negative effects on all studied traits in present study. In general, salinity stress reduced the yield and yield components of rapeseed and the use of calcium silicate reduced the negative effects of salinity stress in both Zarfam and Sarigol cultivars and Sarigol cultivar had more resistance than Zarfam cultivar to salt stress and it used more effectively from calcium silicate.

کلیدواژه‌ها [English]

  • Sarigol cultivar
  • Silicon
  • yield
  • Yield components
  • Zarfam cultivar

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