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Preference value of plant species grazed by sheep during the grazing season in Khoshkerood Saveh rangelands )Case study: cross-breed Sangsari-Afshar)

    Authors

    1 Forest and rangeland Division, Yazd Agricultural and Natural Resources Research and Education Center, AREEO, Yazd, Iran

    2 Rangeland Research Division, Research Institute of Forests and Rangelands, AREEO, Tehran, Iran

    3 Rangeland Research Division, Research Institute of Forests and Rangelands, Tehran, AREEO, Iran

,

Document Type : Research Paper

Abstract

Defining the preference value of plant species is necessary for planning and management of livestock and rangeland. The purpose of this study was to investigate the preference value of plant species grazed by sheep during the grazing period in Khoshkeh rood Saveh Rangeland of Markazi Province using species selection index.

Production and consumption data of species in and out of the enclosure was collected over six months of grazing season for three years to calculate the species selection index. Maximum preference values for Poasinaica (in whole grazing season) and Salsolalaricina (especially November and December) and minimum preference values for Cousiniacylindracea (in whole grazing season and especially in dry years) was recorded. Reduction in rainfall in 2008 increased the percentage of utilization and preference index of species. As in April 2008, Artemisia sieberi with preference index 2 was a relatively palatable species and Noaeamucronata and Stachysinflata with preference index over 2.1 were considered quite palatable species. Salsolalaricina in November and December in all the years with preference index over 1.4 was considered as relatively palatable species.
Salsolalaricina is a critical resource for livestock of steppe rangelands throughout the year, especially from mid-November to mid-March. So that in this time, this species has higher palatability than other species accompanied and with proper grazing management should be prevented from excessive utilization.

Keywords

References
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Journal of Range and Watershed Managment
Volume 70, Issue 2
August 2017
Pages 359-372
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History
  • Receive Date: 08 June 2016
  • Revise Date: 05 August 2017
  • Accept Date: 18 December 2016
  • First Publish Date: 23 July 2017
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