اثر محلول‌پاشی نیتروژن، بور و روی بر میزان اکسین، تشکیل و ریزش میوه در پرتقال تامسون ناول (Citrus sinensis cv. Thomson navel)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی سابق کارشناسی ارشد دانشگاه علوم کشاورزی و منابع طبیعی ساری

2 استادیار، دانشگاه علوم کشاورزی و منابع طبیعی ساری

3 استادیار دانشگاه علوم کشاورزی و منابع طبیعی ساری

چکیده

‌به‌منظور بررسی اثر عناصر غذایی نیتروژن، بور و روی بر میزان اکسین و تشکیل میوه در پرتقال تامسون ناول، آزمایشی به‌صورت فاکتوریل بر پایۀ طرح بلوک‏های کامل تصادفی با 12 تیمار و 3 تکرار انجام شد. تیمارهای آزمایش شامل اوره در سه سطح (0، 3 و 6 در هزار)، اسید بوریک در دو سطح (0 و 5/0 در هزار) و سولفات روی در دو سطح (0 و 3 در هزار) بودند. تعداد گل، میوۀ اولیه، میوه‌چه بعد از ریزش خرداد و میوۀ نهایی شمارش شد. طول و قطر میوه، میزان اکسین منطقۀ ریزش و عملکرد اندازه‌گیری شد. مصرف عناصر غذایی اثر معناداری در افزایش تعداد گل، درصد تشکیل میوۀ اولیه و عملکرد داشتند. کمترین میزان ریزش میوۀ اولیه و نهایی در تیمار مصرف هم‌زمان اوره با غلظت 6 در هزار و سولفات روی با غلظت 3 در هزار به دست آمد. بالاترین درصد تشکیل میوه بعد از ریزش خرداد و اکسین، در تیمار اثر متقابل سولفات روی با غلظت 3 در هزار و اسید بوریک با غلظت 5/0 در هزار حاصل شد.

کلیدواژه‌ها


عنوان مقاله [English]

Effects of foliar applications of nitrogen, boron and zinc on auxin contents, fruit set and fruit drop in orange (Citrus sinensis) cv. Thompson Navel

نویسندگان [English]

  • Fatemeh Seedkolai 1
  • Hosein Sadeghi 2
  • Hosein Moradi 3
1 Former Graduate Student Professors, , Department of Horticulture, University of Agricultural Sciences and Natural Resources, Sari.
2 Assistant Professors, Horticulture Masters student, Department of Horticulture, University of Agricultural Sciences and Natural Resources, Sari.
3 Assistant Professors, Horticulture Masters student, Department of Horticulture, University of Agricultural Sciences and Natural Resources, Sari.
چکیده [English]

In order to investigate the effect of nitrogen, boron and zinc on auxin content and fruit set in Thompson navel orange, a factorial experiment based on complete randomized block design with 12 treatments and 3 replications was conducted. Experimental treatments included: urea at three levels (0, 3 and 6 gr/L), boric acid at two levels (0 and 0.5 gr/L) and zinc sulfate at two levels (0 and 3 gr/L). The number of flower, initial fruit set, fruit-set after the June drop and the final fruit set were measured. The length and diameter of fruit and the auxin content in the abscission zone were measured. Nutrient application had a significant effect on increasing the number of flowers, percentage of initial fruit set and yield. The lowest rate of initial and final fruit drop were obtained in combined treatments, using of urea at concentration of 6 gr/L and zinc sulfate with concentration of 3 gr/L. The highest percentage of fruit set after the June drop and amount of auxin were obtained in the combined treatments of zinc sulfate (3 gr/L) plus boric acid at 0.5 gr/L which had significant positive effect on yield increment.
 

کلیدواژه‌ها [English]

  • citrus
  • Nutrients
  • june drop
  • final fruit set
 
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