The effect of changes in diurnal temperature and photoperiod on growth and yielding of garden dill grown in pots

• Autorzy: Fraszczak B.

Warianty tytułu

PL

Wpływ zmian w dobowej temperaturze i fotoperiodzie na wzrost i plonowanie kopru ogrodowego w pojemnikach

• Języki publikacji: EN

Abstrakty

EN

Temperature and light are important factors determining growth and development of plants. The difference between day and night temperature (DIF – defined as day temperature minus night temperature) influences plant morphology in a wide range of species. In this study, the effect of photoperiod and DIF on stem elongation and growth of dill plants was investigated. The first experiment included a comparison of different temperatures between day and night (DIF-5 – 20/25°C, DIF0 – 20°C and 25°C, DIF+5 – 25/20°C) for a 16-h photoperiod. The second experiment comprised the photoperiod of 16 and 24 hours for two constant temperatures – 20 and 25°C. Significant differences between DIF+5 and DIF-5 were observed in the case of plant height. Elongation growth was enhanced by positive DIF and was inhibited by negative DIF, although the strongest stem elongation inhibition was recorded at the temperature of 25°C and a 16-h photoperiod. Leaf area was greatly affected by the temperature and DIF, but only slightly influenced by the photoperiod. Leaf area in DIF-5 was smaller than that in DIF+5 or 0 (20°C). The highest essential oil content in the herbage was recorded for a constant temperature of 25°C as well as 20°C and a 24-hour photoperiod.

PL

W przeprowadzonych doświadczeniach badano wpływ fotoperiodu i DIF na elongację i wzrost roślin kopru ogrodowego. W pierwszym doświadczeniu porównywano zróżnicowaną temperaturę dnia i nocy (DIF-5 – 20/25°C, DIF0 – 20°C i 25°C, DIF+5 – 25/20°C) dla 16-godzinnego fotoperiodu. W drugim doświadczeniu czynnikami były: fotoperiod – 16 i 24 godziny oraz dwie stałe, dobowe temperatury – 20 i 25°C. Stwierdzono istotne różnice w wysokości roślin dla DIF+5 i DIF-5. Dodatnie DIF wpływało stymulująco na wysokość roślin, natomiast ujemne DIF obniżało wartość ej cechy. Jednak największe zahamowanie wzrostu elongacyjnego roślin stwierdzono dla temperatury 25°C przy 16-godzinnym fotoperiodzie. Powierzchnia liści zależała od temperatury i DIF, a w znacznie mniejszym stopniu od okresu świetlnego. Mniejszą powierzchnię liści uzyskano dla DIF-5 w porównaniu z DIF+5 i DIF0 (20°C). Najwyższą zawartość olejków eterycznych w zielu stwierdzono w uprawie w stałej temperaturze 25°C oraz w temperaturze 20°C i 24-godzinnym okresie świetlnym.

• Wydawca: -
• Czasopismo: Acta Scientiarum Polonorum. Hortorum Cultus
• Rocznik: 2012
• Tom: 11
• Numer: 2
• Opis fizyczny: p.217-228,fig.,ref.

Twórcy

autor

Fraszczak B.

• Department of Vegetable Crops, Poznan University of Life Sciences, ul.Dabrowskiego 159, 60-594 Poznan, Poland

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