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Abstract of the Article

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Drought and Rangeland management

Author:
[ mahdieh Ebrahimi ] - M Sc in Rangeland management at Tehran University

Abstract:

Main parts of our country have located in arid and semi arid regions ,that have got frail condition and drought often has occurred in the regions. damages drought against natural resources are very much, specially it if is accompanied whit irregular utilization from range lands it will caused loss of plant cover and stock production… . Target of the valuation is drought effect valuation on percent plant cover changes and plants production and their density. The valuation did four years in Dardin region and all of factors valued in fixed quadrates .Production by clipping and weighting method, canopy cover by occular method and density by quadrate method estimated. There was correlation between plant parameters and climatic factors the most canopy cover was in 2002 year with the most precipitation Least canopy cover are related to 2000 year. Density was in 2002 year more than among all of years with the most precipitation. Production was increased 6.5% with precipitation increase.

Keywords:

Drought, Canopy cover, Density, Production , Range management