تاثیر سایه‌دهی با استفاده از توری‌های سایه‌بان بر شاخص‌های رشد، فیزیولوژی و عملکرد کرفس

نوع مقاله: مقاله پژوهشی

نویسندگان

1 گروه علوم باغبانی- دانشکده کشاورزی و منابع طبیعی- دانشگاه محقق اردبیلی

2 گروه آموزشی علوم باغبانی، دانشکده علوم کشاورزی دانشگاه محقق اردبیلی

چکیده

در بسیاری از گیاهان نورپسند، سایه‌دهی به‌دلیل کاهش تشعشع نوری، ویژگی‌های رشدی و عملکرد آنها را تحت تاثیر قرار می‌دهد. در همین راستا به منظور بررسی تاثیر شدت‌های مختلف سایه‌دهی (0، 25 و 50 درصد) بر رشد و نمو کرفس، آزمایشی به‌صورت طرح بلوک‌های کامل تصادفی با چهار تکرار اجرا شد. نتایج نشان داد که حداکثر طول ساقه، ارتفاع گیاه و تعداد ساقه در تیمار سایه‌دهی 50 درصد و حداقل آنها در شدت نور کامل به‌دست آمد. سطح برگ و سطح ویژه برگ در گیاهان در معرض نور کامل نسبت به سایه‌دهی 50 درصد به ترتیب 330 و 42 درصد کاهش نشان داد. نسبت Fv/Fm و هدایت روزنه‌ای برگ با کاهش شدت نور افزایش یافت. شاخص کلروفیل برگ، وزن تر و خشک دمبرگ و پهنک برگ برای گیاهان تحت سایه در مقایسه با گیاهان تحت نور کامل بیشتر بود. بیشینه عملکرد (718 گرم در بوته) در سایه‌دهی 50 درصد و کمینه آن در شدت نور کامل (155 گرم در بوته) تولید شد. از نتایج آزمایش می‌توان نتیجه‌گیری نمود که کرفس‌های رشد یافته در سایه‌دهی 50 درصد رشد و عملکرد بهتری داشتند.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of shading by Saran® clothes on growth and physiological indices and yield of Celery

نویسندگان [English]

  • Rasoul Azarmi 1
  • Mousa Torabi-Giglou 2
1 Department of Horticultural Sciences, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran.
2 Department of Horticultural Sciences, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran.
چکیده [English]

In many sun-loving plants, shading affects their growth characteristics and yield due to the reduction of solar radiation. In order to evaluate effect of different shading levels (0, 25 and 50 percent) on growth and yield of celery (Apium graveolens L.), this experiment was carried out as randomized complete block design with four replications. Results showed that the maximum and minimum length, height and stem number of celery recorded for plants exposed to 50 percent shading and full light intensity, respectively. Leaf area and specific leaf area in plants exposed to full light decreased 330 and 42 percent, respectively in comparison to those received 50 percent shading. The Fv/Fm ratio and leaf stomatal conductance increased with decreasing light intensity. Leaf chlorophyll index, fresh and dry weight of leaf petiole and blade of plants under shade were higher than those grew under full sunlight. The maximum (718g per plant) and minimum total yield (155g per plant) obtained in shading 50 percent and full light intensity, respectively. For conclusion, celeries grown in 50 percent light intensity had better growth and yield.

کلیدواژه‌ها [English]

  • Celery
  • Light intensity
  • Quantity and physiological characteristics

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