Seasonal variation in wool growth rate of Awassi sheep in Iraq


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Authors

  • R A M AL-JASSIM
  • ASHWAQ A A HASSAN
  • J E ALKASS

Keywords:

Ambient temperature, Awassi sheep, Fibre diameter, Photoperiod, Seasonal variation, Sheep, Wool growth rate

Abstract

Monthly variation in wool growth rate and fibre diameter were studied in 18 Awassi rams of 18 months of age and 47.6 ± 0.89 kg (mean ± SE) in body weight (BW). Rams Were maintained under aconstant feeding level (2.5 % of BW) during the whole experimental period (12 months). Wool growth rate (mg/cm2/d) was measured by mid-side patch technique and the fibre diameter by Sonic Fineness Tester. Wool growth rate.ranged between 0.612 and 0.192 mg/cm2/d with two peaks being recorded during August (0.788) and February (0.192). Differences were statistically significant (P< 0.05). Fibre diameter averaged 34 mm. The correlation coefficients between wool growth rate and each of ambient temperature (oC), day length (hr), BW, fibre diameter, were respectively 0.16 (NS), 0.32 (NS), 0.26 (NS) and 0.88 (P<0.01).

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Author Biographies

  • R A M AL-JASSIM
    PO Box 582, Wentworthville. NSW 2145, Australia.
  • ASHWAQ A A HASSAN
    Department of Animal Resources, College of Agriculture, Abu
    Ghraib, Baghdad University, Baghdad, Iraq.
  • J E ALKASS
    Department of Animal Resources, College of Agriculture, Abu Ghraib, Baghdad University, Baghdad, Iraq.

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Issue

Vol. 67 No. 10 (1997)

Section

Articles

License

The copyright of the articles published in The Indian Journal of Animal Sciences is vested with the Indian Council of Agricultural Research, which reserves the right to enter into any agreement with any organization in India or abroad, for reprography, photocopying, storage and dissemination of information. The Council has no objection to using the material, provided the information is not being utilized for commercial purposes and wherever the information is being used, proper credit is given to ICAR.

How to Cite

AL-JASSIM, R. A. M., A HASSAN, A. A., & ALKASS, J. E. (2013). Seasonal variation in wool growth rate of Awassi sheep in Iraq. The Indian Journal of Animal Sciences, 67(10). https://epubs.icar.org.in/index.php/IJAnS/article/view/35130