تاثیر طیف‎‌‎های مختلف نور ‏LED‏ بر ویژگی‌های مورفولوژیکی و محتوای عناصر معدنی در نشاهای ‏پیوندی و غیرپیوندی گوجه‌فرنگی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران

2 دانشیار، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران

3 استادیار، دانشکدگان کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران

4 استادیار، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران

چکیده

در این پژوهش، تاثیر طیف­های مختلف نور LED شامل 100درصد نور قرمز، 100درصد نور آبی، 70درصد نور قرمز + 30 درصد نور آبی و همچنین 100درصد نور سفید با شدت نور یکسان 5± 75 ماکرومول بر مترمربع در ثانیه، به مدت 30 روز بر میزان رشد و محتوای عناصر معدنی در نشاهای گوجه‌فرنگی غیرپیوندی و پیوند شده روی پایه  Maxifort مورد بررسی قرار گرفت. مدت روشنایی، دما و رطوبت اتاق رشد به ترتیب 16 ساعت، 2± 21/25 (شب/روز) درجه سلسیوس و 95 درصد تنظیم شدند. نتایج نشان داد بیشترین میزان طول ساقه در نشاهای غیرپیوندی زیر نور 100درصد قرمز بدست آمد. بیشترین قطر ساقه نیز در نور آبی و قرمز-آبی بدست آمد. بالاترین وزن تر ریشه در زیر نور سفید و قرمز-آبی و بیشترین وزن خشک ریشه زیر نور قرمز-آبی بدست آمد. بالاترین میزان سطح برگ، وزن خشک شاخساره و کل در نشاهای غیرپیوندی زیر نور قرمز-آبی بدست آمد. بیشترین میزان فسفر در نشاهای غیرپیوندی زیر نور قرمز بود. نشاهای پیوندی زیر نورهای قرمز، آبی و قرمز-آبی و همچنین نشاهای غیرپیوندی زیر نورهای سفید و قرمز-آبی بیشترین میزان پتاسیم را داشتند. نشاهای پیوندی زیر نور آبی بالاترین میزان جذب کلسیم را دارا بودند. همچنین بیشترین میزان جذب منیزیم در نشاهای غیرپیوندی زیر نور سفید بدست آمد. در مجموع، نتایج این پژوهش نشان داد کاربرد 70درصد نور قرمز + 30 درصد نور آبی در کنار استفاده از یک پایه قدرتمند مانند مکسی فورت، می­تواند باعث بهبود رشد و جذب بهتر عناصر معدنی در نشاهای گوجه‌فرنگی ­شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effects of LED light spectrum on morphological traits and mineral element ‎concentrations of grafted and non-grafted tomato seedlings

نویسندگان [English]

  • Seyed Reza Soltani 1
  • Hossein Arouiee 2
  • Reza Salehi 3
  • Seyed Hossein Nemati 4
1 Ph. D. Candidate, Faculty of Agriculture, Ferdowsi University ‎of Mashhad, Mashhad, Iran
2 Associate Professor, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
3 Assistant Professor, College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran
4 Assistant Professor, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
چکیده [English]

In this experiment, we investigated impacts of various LED light qualities, including 100% red, 100% blue, 70% red + 30% blue, and 100% white with the same light intensity 75±5 µmol m-2 s-1 for 30 days on the growth and mineral element concentrations in grafted onto ‘Maxifort’ rootstock and non-grafted tomato seedlings. Photoperiod, temperature, and relative humidity of the growth chamber were maintained at 16 h, 25/21±2 °C (day/night), and 95%, respectively. Results showed that the maximum of plant height was obtained in non-grafted seedlings under 100% R light. The maximum of stem diameter was obtained under 100% B and 70% R:30 %B treatments. The maximum of root fresh weight was obtained under 100% W and 70 % R:30 %B treatments, while the maximum of root dry weight was obtained under 70 % R:30 % B light treatment. The maximum of leaf area, shoot and total dry weight were obtained in non-grafted seedlings under 70 % R:30 % B light treatment. In addition, non-grafted seedlings under 100% R treatment had the highest P concentration. The maximum of K was obtained in grafted seedlings under 100% B, 100% R and 70 % R:30 %B light treatments and non-grafted seedlings under 100% W and 70 % R:30 % B light treatments. Grafted seedlings under 100% B had the highest Ca concentration. In addition, the maximum of Mg was obtained in non-grafted seedlings under 100% W treatment. Collectively, our results showed that combination of 70% red and 30% blue light and as well as the use of a powerful rootstock like ‘Maxifort’ could promotes plant growth and mineral element concentrations for tomato seedlings.

کلیدواژه‌ها [English]

  • Artificial light
  • grafted seedling
  • light quality

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علوم باغبانی ایران
دوره 53، شماره 4
دی 1401
صفحه 977-988

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  • تاریخ دریافت: 27 اسفند 1400
  • تاریخ بازنگری: 13 تیر 1401
  • تاریخ پذیرش: 25 تیر 1401

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