نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران، ایران

2 استادیار، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران، ایران

3 دانشیار، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران، ایران

چکیده

به منظور بررسی اثر محلول‌پاشی نانوذرات کربنات کلسیم و افزایش غیر مستقیم غلظت دی‌اکسید کربن حاصل از آن بر تعدیل تنش شوری گل رز رقم دلسویتا، آزمایشی به صورت فاکتوریل در قالب طرح بلوک های کامل تصادفی به روش کشت بدون خاک با بستر مخلوط کوکوپیت و پرلیت، در سه تکرار اجرا شد. عامل اول شوری در دو سطح ( 8/1 و 2/3 دسی‌زیمنس بر متر با افزودن کلرید سدیم به محلول غذایی پایه) و عامل دوم محلول پاشی نانوذرات کربنات کلسیم در چهار سطح (صفر، 3 ، 6 و 9 گرم بر لیتر با استفاده از کود لیتوویت) بودند. افزایش شوری و غلظت نانوذرات کربنات کلسیم اثری بر غلظت پتاسیم و سدیم برگ و میزان نشت الکترولیت سلول‌های برگ نداشت. شوری 2/3 دسی‌زیمنس بر متر رطوبت نسبی آب برگ را کاهش و ماده خشک و قند محلول را در برگ گیاه افزایش داد، اما اثری بر صفات مورفولوژیک مورد مطالعه نداشت. کاربرد نانوذرات کربنات کلسیم، رطوبت نسبی برگ در هر دو تیمار شور و غیر شور و میانگین تمام صفات مورفولوژیک (سطح برگ، قطر گل، طول ساقه و عملکرد گل) را به‌طور معنی‌داری افزایش داد. همچنین، کاربرد 6 و 9 گرم بر لیتر نانوذرات کربنات کلسیم غلظت کلروفیل، کارتنوئید و قند محلول برگ را به طور معنی داری افزایش داد، در حالی که شوری اثری بر این صفات نداشت. نتایج نشان داد محلول‌پاشی نانو ذرات کربنات کلسیم، با تاثیر بر ویژگی‌های فیزیولوژیک و مورفولوژیک و بهبود تغذیه‌ گیاه، موجب تعدیل تنش شوری و بهبود شرایط رشد گل رز دلسویتا می‌شود.

کلیدواژه‌ها

عنوان مقاله [English]

Alleviation of salinity stress on Rosa hybrida L. cv. 'Dolce Vita by foliar application ‎of calcium carbonate nanoparticles ‎

نویسندگان [English]

  • Erfan Omidi 1
  • Neda Dalir 2
  • Rasoul Rahnemaie 3
  • Alireza Babaei 3

1 M. Sc., Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran

2 Assistant Professor, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran

3 Associate Professor, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran

چکیده [English]

To investigate the effect of foliar application of calcium carbonate nanoparticles (CCN) and indirectly increasing carbon dioxide concentration on salt stress modulation of rose 'Dolce Vita., a soilless culture experiment was conducted as a randomized complete blocks design with three replications, in which the pots were filled with a mixture of cocopeat and perlite. The first factor was salinity at two levels (1.8 and 3.2 dS m-1 by adding NaCl to the nutrient solution) and the second factor was foliar spraying of CCN at four levels (0, 3, 6 and 9 g L-1 by using Lithovit fertilizer). Increasing salinity and the concentration of CCN had no effect on potassium and sodium contents of leaves and electrolyte leakage of leaf cells. The salinity of 3.2 dS m-1 reduced the relative humidity of leaf and increased the dry matter percentage and soluble sugar content in the plant leaves; however, had no significant effect on studied morphological characteristics. The application of CCN significantly increased the relative humidity of leaves in both saline and non-saline treatments and the mean of morphological traits (leaf area, flower diameter, stem length and flower yield). In addition, the application of 6 and 9 g L-1 CCN significantly increased the concentration of chlorophyll, carotenoid, and leaf soluble sugar; however, salinity had no effect on these characteristics. Results showed that foliar application of CCN, by affecting physiological and morphological traits and improving plant nutrition, modulates salinity stress and improves the growth conditions of Dolce Vita rose.

کلیدواژه‌ها [English]

  • carbon dioxide
  • enrichment
  • hydroponics‎
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