The relationship between annual fodder production and rainfall and temperature fluctuations in ranges in dry areas

Document Type : Research

Authors

1 Faculty member of Yazd Research Center of Agriculture and Natural Resources

2 Professor of Natural Resources Faculty, University of Tehran

3 M.Sc. of Range management, Tarbiat Modares University

4 B.Sc. of Yazd Research Center of Agriculture and Natural Resources

Abstract

In arid and semi-arid rangeland ecosystems, rainfall and temperature variables play a major role in the availability of water within soil profiles and strongly influencing plant productivity and composition in plant communities. In this research, the reactions of the dominant plant species yield to meteorological variables were studied at steppic range in Garize region of Yazd province for nine years. For this purpose, seven dominant Species were selected and their production was monitored every year with double sampling method along four permanent line transect in 60 plots (2m2). Meteorological data were collected from nearby climatological station. Relationships between Main meteorological gradients and annual yield analyzed by redundancy analysis (RDA). According to this result, total annual yield and annual yield of Artemisia sieberi, Aellenia subaphylla and Salsola arbuscula influenced by rainfall in December-March period. Yield of Salsola regida, Salsola tomentosa and Noaea mucronata are influenced not only by rainfall in December-January but also by variability of May high temperature. Species yield of Lactuca orientalis influenced by rainfall and high temperature in April.

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History

  • Receive Date: 10 October 2012
  • Revise Date: 16 February 2013
  • Accept Date: 19 March 2013

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