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اخبار و اعلانات

تأثیر کاربرد هم‌زمان هیومیک‌اسید و کود فسفر بر شاخص‌های رشد رویشی و فراهمی فسفر در کلزا

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه علوم خاک ، دانشکده مهندسی آب و خاک، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، ایران

2 حاصلخیزی و تغذیه

3 بیولوژی و بیوتکنولوژی خاک استادیار علوم خاک گرگان

چکیده

اسید هیومیک دارای فعالیت شبه­هورمونی است که رشد گیاه و جذب عناصر غذایی را افزایش می­دهد. در این پژوهش، تأثیر کاربرد هم‌زمان اسید هیومیک و کود فسفر بر برخی شاخص‌های رشد رویشی (ارتفاع گیاه، وزن تر و خشک ساقه و برگ، تعداد گل، تعداد برگ و شاخه­های فرعی) و فراهمی فسفر در گیاه کلزا (Brassica napus L.) رقم هایولا 50 بررسی شد. برای این کار، آزمایشی به‌صورت فاکتوریل در قالب طرح کاملاً تصادفی با 3 تکرار به‌صورت گلدانی اجرا شد. تیمارها شامل فسفر در سه سطح 0، 50 و 100 میلی­گرم بر کیلوگرم خاک و اسید هیومیک در سه سطح 0، 5/0 و 1 گرم بر کیلوگرم خاک و روش مصرف اسید هیومیک و فسفر بود. بر پایه نتایج به‌دست آمده، اثر غلظت­های مختلف فسفر، اسید هیومیک و روش مصرف آن و اثر متقابل آن­ها در تمام صفات مورد مطالعه بجز تعداد شاخه­های فرعی در سطح احتمال یک درصد معنادار بودند. نتایج اثر متقابل سطوح اسید هیومیک و روش های کاربرد آن در حضور تیمارهای فسفر نشان داد که بیشترین مقادیر در صفات وزن تر و خشک برگ و ساقه از تیمار کودی 100 میلی­گرم فسفر بر کیلوگرم و سطح 1 گرم اسید هیومیک بر کیلوگرم مصرف همراه با آب آبیاری به­دست آمد. بیشترین غلظت فسفر برگ و ساقه با غلظت 3/0 درصد در تیمار مصرف 1 گرم اسید هیومیک بر کیلوگرم همراه با آب آبیاری سطح 100 میلی­گرم فسفر بر کیلو گرم مشاهده شد. همچنین غلظت­های مختلف فسفر، اسید هیومیک و روش مصرف آن و اثر متقابل آن­ها طول دوره گل‌دهی را از 144 روز  به 93 روز کاهش داد. مصرف ترکیبی 100 میلی­گرم فسفر بر کیلوگرم و 1 گرم اسید هیومیک بر کیلوگرم همراه آب آبیاری بیشترین افزایش را در شاخص‌های رشد رویشی و غلظت فسفر در بخش هوایی کلزا داشت.

کلیدواژه‌ها

عنوان مقاله [English]

The effects of Co-Application of Humic Acid and Phosphorous Fertilizer on Vegetative Growth Indices and Phosphorous Availability in Canola

نویسندگان [English]

  • Ameneh Jahandideh 1
  • Reza Gorbani 3
  • Esmael Dordipour 1
  • Taleb Nazari 1

1 Department of Soil Sciences, Faculty of Water and Soil Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.

3 بیولوژی و بیوتکنولوژی خاک

چکیده [English]

Abstract
Humic acid has a pseudo hormonal activity that increases plant growth and nutrient uptake. In the present study, the effects of different levels of humic acid and phosphorus fertilizer on vegetative growth indices (Plant height, Fresh and dry weight of stem and leaf, number of flowers, number of leaves and branches) and phosphorus availability in canola (Brassica napus L.) cv. Hyola 50 were investigated. For this purpose, the pot experiment as factorial based on completely randomized design in three replications has been conducted. Treatments include phosphorous fertilizer as super phosphate in three levels 0, 50 and 100 mg/kg, humic acid in three levels 0, 0.5 and 1 g/kg and application methods of phosphorous and humic acid. Based on the results, the effect of different concentrations of phosphorus, humic acid and its method of application, and their interaction in all studied traits, except for the number of branches, were significant (p≤0.01). Results of the interaction effect of humic acid concentration and its application methods in the presence of phosphorous treatments showed that the highest amounts of fresh and dry weight of leaves and stem obtained in 100 mg/kg phosphorous and 1 g/kg humic acid applied with irrigation water. The highest phosphorous content in leaves and stem by 0.3 percent observed in 1 g/kg humic acid and 100 mg/kg phosphorous applied with irrigation water. Additionally, different concentrations of phosphorous and humic acid and their application methods and their interactions decreased canola flowering period from 144 days to 93 days. Combined application of 100 mg/kg phosphorous and 1 g/kg humic acid within irrigation water resulted in maximum increase in vegetative growth indices and phosphorous content in canola shoot.

کلیدواژه‌ها [English]

  • Canola
  • Humic acid
  • Phosphorus
  • Vegetative growth parameters
مراجع
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تحقیقات کاربردی خاک
دوره 8، شماره 1 - شماره پیاپی 1
اردیبهشت 1399
صفحه 68-78
فایل ها
سابقه مقاله
  • تاریخ دریافت: 11 اسفند 1397
  • تاریخ بازنگری: 05 خرداد 1398
  • تاریخ پذیرش: 13 خرداد 1398
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