چکیده مقاله :
This study was conducted to assay the effects of methanol foliar application (0, 10, 20 and 30% v/v) and bed cover (control, white and black covers) on yield and some physiological traits of marigold as a factorial based on RCBD. The results revealed the significant interaction effects of bed cover and methanol foliar application on chlorophyll a content and plant height. The highest plant height was belonged to black mulch × methanol (except for 30% methanol). The highest chlorophyll a content (2.3 mg g-1 FW) was attained by black mulch × 30% methanol. Chlorophyll b content was influenced by soil cover and the highest chlorophyll b content (1.1 mg g-1 FW) was recorded with black mulch. The flowers and leaves dry weight as well as relative water content and total soluble solids content were affected by the treatments and, the highest data for flower dry weight (116 g) was in 30% foliar spray and black mulch (103.6 g). The highest data for total soluble solids content (120 °Brix) and relative water content (49.7%) were recorded with 30% methanol foliar application and by black soil cover. For root-dry weight (15.3 g) and total phenolics content (95.05 mg GA g-1 Dwt), black mulch was the treatment of choice.
چکیده انگلیسی:
به منظور بررسی تاثیر محلولپاشی با متانول (0، 10، 20 و30 درصد) و خاکپوش (شاهد، خاکپوش سفید و سیاه) بر عملکرد و برخی خصوصیات فیزیولوژیک گل همیشه بهار آزمایشی به صورت طرح فاکتوریل بر پایه طرح بلوکهای کامل تصادفی اجرا شد. نتایج نشان دهنده وجود اثر متقابل معنیدار خاکپوش و محلول پاشی بر محتوای کلروفیل a و ارتفاع گیاه بود. نتایج نشان داد که بالاترین ارتفاع گیاه از تیمار خاکپوش سیاه × متانول (به غیر از سطح محلول پاشی 30 %) به دست آمد. بیشترین میزان کلروفیل a (3/2 میلی گرم بر گرم وزن تر) در ترکیب تیماری خاکپوش سیاه × 30 % متانول حاصل شد. محتوای کلروفیل b تحت تاثیر خاکپوش قرار گرفت و بالاترین مقدار کلروفیلb در تیمار خاکپوش سیاه (1/1 میلی گرم بر گرم وزن تر) مشاهده شد. وزن خشک گل، برگ، محتوای مواد جامد محلول و آب نسبی برگ تحت تاثیر جداگانه تیمار خاکپوش و محلول پاشی قرار گرفت. بالاترین میزان وزن خشک گل (116 گرم) در تیمار محلول پاشی 30 % و خاکپوش سیاه (103 گرم) ثبت شد. بیشترین میزان آب نسبی برگ (7/49 %)، مواد جامد محلول (120 درجه بریکس) در تیمار محلول پاشی 30% متانول و خاکپوش سیاه مشاهده شد. بیشترین وزن خشک ریشه (23/15 گرم) و محتوای فنل کل (05/95 میلی گرم گالیک اسید بر گرم وزن خشک) از تیمار خاکپوش سیاه به دست آمد.
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