The Modeling of Development Stages of Sunflower on the Basis of Temperature and Photoperiod

Authors

  • Sasan REZADUST PhD student of agronomy, Islamic Azad University of Karaj (IR)
  • Mohamad MEHDI KARIMI Faculty of Agriculture, Esfehan Industrial University (IR)
  • Saiid VAZAN Department of Agronomy and plant breeding of Islamic Azad University of Karaj, Iran (IR)
  • Mohammad Reza ARDAKANI Department of Agronomy and plant breeding of Islamic Azad University of Karaj, Iran (IR)
  • Ali KASHANI Department of Agronomy and plant breeding of Islamic Azad University of Karaj, Iran (IR)
  • Esmaeel GHOLINEZHAD Islamic Azad University, Science and Research Branch of Khozestan (IR)

DOI:

https://doi.org/10.15835/nbha3813564

Keywords:

linear regression; modeling; photoperiod; planting date; sunflower

Abstract

This experiment was conducted at the Station of Agricultural Research and Natural Resources, Khoy, Iran in 2007 and 2008 to evaluate the effect of temperature and photoperiod on the duration of development stages of sunflower. A randomized complete block design using a 8 x 3 factorial arrangement with four replications involving eight plantings (29th April, 4th May, 14th May, 24th May, 1st June, 10th June, 19th June and 28th June) and three sunflower cultivars ('Sor', 'Eroflor', 'Azargol'). From the results obtained, all development stages, especially the generative phase were influenced by planting date. The duration of each development stage decreased with the delay in planting. The designed models indicated that the minimum temperature and photoperiod were directly proportional to the development rate (DR) of the whole life cycle of different sunflower cultivars. DR decreased from emergence (E) to physiological maturity (PM) as day length increased. The relationship between DR and photoperiod could be used as a practical model for estimating E to PM duration of these sunflower cultivars.

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Published

2010-06-15

How to Cite

REZADUST, S., KARIMI, M. M., VAZAN, S., ARDAKANI, M. R., KASHANI, A., & GHOLINEZHAD, E. (2010). The Modeling of Development Stages of Sunflower on the Basis of Temperature and Photoperiod. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 38(1), 66–70. https://doi.org/10.15835/nbha3813564

Issue

Vol. 38 No. 1 (2010)

Section

Research Articles
CITATION
DOI: 10.15835/nbha3813564

License

Copyright (c) 2010 Sasan REZADUST, Mohamad MEHDI KARIMI, Saiid VAZAN, Mohammad Reza ARDAKANI, Ali KASHANI, Esmaeel GHOLINEZHAD

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

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© Articles by the authors; licensee UASVM and SHST, Cluj-Napoca, Romania. Papers published in the journal Notulae Botanicae Horti Agrobotanici Cluj-Napoca are open access distributed under the terms and conditions of the Creative Commons Attribution License (http://creativecommons.org/licenses).

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