African Journal of
Plant Science

  • Abbreviation: Afr. J. Plant Sci.
  • Language: English
  • ISSN: 1996-0824
  • DOI: 10.5897/AJPS
  • Start Year: 2007
  • Published Articles: 688

Short Communication

Determination of the suitable planting date and plant density for different cultivars of barley (Hordeum vulgare L.) in Fars

Ali Soleymani1*, Mohamad Hesam Shahrajabian2 and Lila Naranjani3
1Department of Agronomy and Plant Breeding, Islamic Azad University, Khorasgan (Esfahan) Branch, Esfahan, Iran. 2Department of Agronomy and Plant Breeding, Faculty of Agriculture, Ramin   Agriculture and Natural Resource University, Ahwaz, Iran. 3Department of Basic Sciences, Islamic Azad University, Dolatabad Branch, Esfahan, Iran.
Email: [email protected]

  • Article Number - 1DC0F9B9113
  • Vol.5(4), pp. 284-286, April 2011
  •  Accepted: 01 March 2011
  •  Published: 30 April 2011

Abstract

For a self-cooling building, alternative sources of roofing and ceiling materials in building design was investigated. The thermal property of Rattan palms (Calamus deërratus), Raffia palms (Raphia hookeri) and synthetic Nigerite asbestos sheets were determined using the Lees’ disc apparatus. Results showed that Rattan palms sheet had the lower thermal conductivity (k = 0.046 Wm-1 K-1) and a higher resistivity (r = 21.930 W-1mK) compared with Raffia palms sheet. While both palms showed lower thermal conductivity (k = 0.046 to 0.056 Wm-1K) and higher resistivity (r = 17.73 to 21.930 W-1mK) than asbestos sheet (k = 0.084 Wm-1K, r = 11.919 W-1mK). The results indicated that Rattan palms have a higher potential for heat resistivity than many other wood based heat-insulating materials and are recommended for ceiling in modern building design.

 

Key words: Self-cooling building, insulators, heat, Lees’ disk, Rattan, Raffia.

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