تاثیر محلول پاشی عنصر روی و هورمون رشد اکسین بر شاخص‌های موفولوژیک و فیزیولوژیک رشد و برخی صفات الیاف سه رقم پنبه

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکترای رشته زراعت دانشگاه آزاد اسلامی واحد علوم و تحقیقات تهران

2 استادیار پژوهش بخش تحقیقات پنبه مرکز تحقیقات کشاورزی و منابع طبیعی استان تهران(ورامین)

3 استاد گروه زراعت دانشگاه آزاد اسلامی واحد علوم و تحقیقات تهران

4 دانشیار گروه زراعت دانشگاه آزاد اسلامی واحد اراک

چکیده

به منظور بررسی تاثیر عنصر روی از منبع Zn EDTA و تنظیم کننده رشد اکسین NAA بر صفات کمی و کیفیت الیاف و شاخص‌های فیزیولوژیک سه رقم پنبه، آزمایشی به صورت اسپلیت اسپلیت پلات در قالب طرح پایه بلوک کامل تصادفی با سه تکرار در منطقه ورامین در سال‌های زراعی 1393-1392 انجام گرفت. در این پژوهش کرت اصلی شامل سه رقم پنبه (رقم ورامین، خرداد و پاک)، کرت فرعی شامل محلول‌پاشی با کلات روی در سه سطح؛ محلول­پاشی با آب خالص (شاهد)، کلات روی با غلظت یک در هزار، کلات روی با غلظت دو در هزار) بودند و محلول­پاشی با نفتالین استیک اسید با غلظت 30 میلی­گرم در لیتر به عنوان کرت فرعی فرعی در چهار سطح  محلول پاشی با آب خالص( شاهد)، یک نوبت محلول‌پاشی، دو نوبت محلول‌پاشی و سه نوبت محلول­پاشی انجام شد. نتایج نشان داد که محلول­پاشی کلات روی در غلظت یک در هزار به همراه کاربرد NAA  بصورت محلول پاشی منجر به افزایش تعداد کل غوزه در بوته، افزایش وزن تک غوزه، وزن وش کل و طول الیاف نسبت به شاهد گردید. بیشترین وزن وش کل در رقم خرداد در شرایط محلول­پاشی کلات روی با غلظت یک در هزار همراه با یک نوبت محلول­پاشی NAA به دست آمد. کاربردNAA   باعث کاهش زودرسی گردید. بین ارقام مختلف از نظر طول الیاف، ظرافت اختلاف معنی­داری مشاهده شد.  در کل عکس العمل ارقام مختلف در دو محل به غلظت­های مختلف Zn EDTA و تعداد دفعات محلول­پاشی نفتالین استیک اسید از نظر اکثر صفات مورد بررسی متفاوت بود.

کلیدواژه‌ها

عنوان مقاله [English]

Effect of Zn and Auxin Foliar Application on Morphological and Physiological Growth Indices and some Fiber Traits of Three Cotton Cultivars

نویسندگان [English]

  • Alireza Kelidari 1
  • Musalreza Vafaeetabar 2
  • Ghorban NourMohamadi 3
  • Hamid madani 4
  • Hosein Heidari Sharifabad 3
2 Research Associate Professor of Cotton Research department of Tehran province Agriculture and Natural Resources Center(Varamin)
3 Profe, Department of Agronomy, Science and Research Branch, Islamic Azad University, Tehran, Iran
4 Associate Prof, Department of Agronomy, Arak Branch, Islamic Azad University, Arak, Iran.
چکیده [English]

In order to study the effect of Zn EDTA and NAA application on quantitative and fiber quality traits, and physiological indices of three cotton cultivar, an experiment based on split-split plat arrangement in form of RCB design with three replications performed in Varamin region during 2003-2004 years. In this research, the main plot included three cotton cultivars (Varamin, Khorda and Pak), the subplots were sprayed by spraying with pure water (control), Zn EDTA with 1g/L and 2 g/L concentration and NAA with concentration of 30 mg/L as sub-sub plots that sprayed at 4 levels of (control, one time of spraying, two times spraying and three times spraying). The results showed that Zn EDTA spraying with 1g/L concentration along with using NAA, resulted in increasing the number of total bolls per plant, weight of single bolls, total seed cotton yield and fibers length as compared to the control group. The highest seed cotton yield was obtained in Khordad cultivar with Zn EDTA spraying at 1g/L concentration and on time spraying NAA application. The earliness decreased by using of NAA. There were significant differences among cultivars in term of fiber length and micronairy. In total, reaction of different cultivars to different Zn EDTA concentrations and number of NAA spraying were different in most surveyed characteristics.

کلیدواژه‌ها [English]

  • Auxin
  • Cotton growth
  • Zn
  • Fiber quality

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