تأثیر مصرف توأم نیتروژن وآهن بر شاخص کلروفیل وبرخی ویژگی‌های رشد ذرت علوفه‌ای در شرایط گلخانه‌ای

نوع مقاله: مقاله پژوهشی

چکیده

در این پژوهش تأثیر مصرف توأم نیتروژن وآهن بر شاخص کلروفیل و برخی ویژگی‌های رشد ذرت(Zea mays L.) آزمایشی به‌صورت فاکتوریل در قالب طرح کاملاً تصادفی با سه تکرار در شرایط گلخانه­ای انجام گردید. فاکتورها شامل نیتروژن در سه سطح صفر، 100 و 200 میلی­گرم نیتروژن بر کیلوگرم خاک از دو منبع اوره و اوره با پوشش گوگردی  و آهن در سه سطح صفر، 10 و 20 میلی­گرم آهن بر کیلوگرم خاک از دو منبع سکوسترین  آهن تجاری (Fe-EDDHA) و سولفات آهن (FeSO4.7H2O) بودند. بر اساس نتایج به‌دست آمده اثر اصلی نیتروژن و آهن بر شاخص کلروفیل برگ‌ها و صفات رشد اندازه گیری شده معنادار بود (p<0.01). با این حال، اثر متقابل این دو فقط بر ماده خشک بخش هوایی و شاخص کلروفیل برگ­ها (p<0.05) معنادار شد؛ به‌طوری‌که بیشترین ماده خشک بخش هوایی ذرت در تیمار 200 میلی‌گرم نیتروژن در کیلوگرم خاک از منبع اوره همراه با 10 میلی‌گرم آهن در کیلوگرم خاک از منبع سکوسترین به‌دست آمد. بیشترین شاخص کلروفیل برگ‌های ذرت نیز مربوط به تیمار 200 میلی‌گرم نیتروژن از منبع اوره با پوشش گوگردی همراه با 20 میلی‌گرم آهن در کیلوگرم خاک از منبع سولفات آهن بود. در ویژگی‌های رشد اندازه گیری شده بین دو منبع نیتروژن مورد استفاده در این تحقیق یعنی اوره و اوره با پوشش گوگردی تفاوت معناداری مشاهده نشد.

کلیدواژه‌ها


عنوان مقاله [English]

Effects of Combined Application of Nitrogen (N) and Iron (Fe) on Chlorophyll Index and Some Growth Characteristic of Corn Plant under Greenhouse Conditions

چکیده [English]

In this research, the effects of combined application of nitrogen (N) and iron (Fe) on the chlorophyll index and some growth characteristics of corn were studied using a factorial experiment based on completely randomized design with three replications under greenhouse conditions. The factors were N from two sources including urea and sulfur coated urea (SCU) in 3 levels (0, 100 and 200 mg N kg-1) and the Fe from two sources including commercial Fe-EDDHA and ferrous sulfate (FeSO4.7H2O) in 3 levels (0, 10 and 20 mg Fe kg-1). The results showed that the main effects of both sources of N and Fe on chlorophyll index and growth characteristic of corn plan were significant (p<0.01). Also, the interaction effect of N and Fe on shoot dry weight and leaf chlorophyll index was significant (p<0.05), so that the maximum shoot dry weight of corn was obtained with 200 mg N kg-1 as urea with 10 mg Fe kg-1 as Fe-EDDHA. The maximum leaf chlorophyll index was recorded in treatment with 200 mg N kg-1 from source of SCU with 20 mg Fe kg-1 as FeSO4.7H2O. In the most studied traits the difference between the two nitrogen sources, namely, urea and SCU was not significant.

کلیدواژه‌ها [English]

  • Interaction
  • Iron
  • Nitrogen
  • Urea
  • Sulfur coated urea
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