اثر ترینگزاپک‏ اتیل و تنش پاخوری بر خصوصیات فیزیولوژیک و مورفولوژیک فستوکای پابلند رقم ربل (Festuca arundinacea cultivar Rebel)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، دانشکدۀ کشاورزی، دانشگاه صنعتی اصفهان

2 دانشیار ، دانشکدۀ کشاورزی، دانشگاه صنعتی اصفهان

3 استادیار، دانشکدۀ کشاورزی، دانشگاه صنعتی اصفهان

چکیده

استفاده از کند‌کننده‏های رشد گیاهی از‌جمله ترینگزاپک اتیل در مدیریت چمن بسیار مرسوم و معمول شده است. از‌جمله اهداف استفاده از این ترکیبات کاهش رشد عمودی چمن، افزایش تراکم و مقاومت به تنش‌های زیستی و غیر‌زیستی است. هدف از انجام این آزمایش بررسی اثر سطوح متفاوت ترینگزاپک اتیل (0، 25/0و 5/0 کیلوگرم در هکتار) و تنش پاخوری (پاخوری و عدم پاخوری) بر خصوصیات فیزیولوژیک و مورفولوژیک فستوکای پابلند رقم ربل است که در آزمایشی در غالب طرح فاکتوریل بر پایۀ طرح کاملأ تصادفی در 3 تکرار به اجرا در آمد. نتایج نشان داد ترینگزاپک اتیل و پاخوری سبب کاهش معنادار ارتفاع، وزن تر و خشک چمن فستوکا شد. ارتفاع در غلظت‌های 25/0 و 5/0 کیلوگرم در هکتار به‌ترتیب 84/18 و 06/22 درصد کاهش نشان داد. کاربرد ترینگزاپک اتیل، موجب افزایش تراکم، پنجه‌زنی و کلروفیل شد، درحالی‌که تیمار پاخوری محتوای کلروفیل، تراکم و پنجه‌زنی را به‌صورت معناداری کاهش داد. کاربرد ترینگزاپک اتیل در غلظت 5/0 کیلوگرم در هکتار 36 درصد افزایش پنجه‌زنی و تنش پاخوری 2/17 درصد کاهش پنجه‌زنی را نشان داد. همچنین نتایج نشان داد تیمار پاخوری و ترینگزاپک اتیل کربوهیدرات‌های محلول اندام هوایی را به‌طور‌ معناداری افزایش می‌دهد، در‌صورتی‌که این ماده برخلاف پاخوری اثری معنادار بر کربوهیدرات‌های محلول ریشه نداشت. ترینگزاپک ‏اتیل با افزایش محتوای آب نسبی و کاهش نشت الکترولیت در شرایط تنش پاخوری موجب افزایش مقاومت به پاخوری در فستوکا شد.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of Trinexapac-ethyl and Traffic stress on morphological and physiological traits of tall fescue cultivar Rebel

نویسندگان [English]

  • Mohamad Hossein Sheikh Mohamadi 1
  • Nematollah Etemadi 2
  • Ali Nikbakht 3
1 .Former Graduate Student, College of Agricutlure, Isfahan University of Technology, Isfahan, Iran
2 Associate Professor , College of Agricutlure, Isfahan University of Technology, Isfahan, Iran
3 Assistant Professor, College of Agricutlure, Isfahan University of Technology, Isfahan, Iran
چکیده [English]

Application of growth reterdants such as trinexapac-ethyl has become popular in turf grass management. The principle goal to apply these substances is to reduce lawn vertical growth, prevent inflorescence development and increasing biotic and abiotic tolerance. The aim of the present research wasto investigatethe effect of different trinexapac-ethyl levels (0, 0.25 and 0.5 Kg/h) and traffic stress on morphological and physiological traits of tall fescue cultivar Rebel. Experiment was carried out as a factorial based on completely randomized design in three replicates. Results showed that trinexapac-ethyl and traffic significantly decreased height, dry and fresh weight. Growth reduction in 0.25 and 0.5 Kg/h of trinexapac-ethyl was about 18.84 and 22.06%, respectively. Trinexapac-ethyl application led to increase density, tillering and chlorophyll, amount while traffic treatment reduced relative chlorophyll amount, density and tillering, significantly. Its application at concentration of 0.5 Kg/h increased tillering about 36% and traffic stress reduced it about 17.2%. Results also indicated that, trinexapac-ethyl and traffic treatment increased shoots soluble carbohydrates, significantly, whereas this substance did not affect root soluble carbohydrates in comparison to traffic. Trinexapac-ethyl increased tall fescue traffic stress resistance by increasing relative water content and decreasing electrolyte leakage in traffic stress conditions

کلیدواژه‌ها [English]

  • trinexapac-ethyl
  • traffic stress
  • Festuca arundinace
  • growth rate
 
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