5603

5236

كارشناسي ارشد

مرتعداري

اصفهان: دانشگاه صنعتي اصفهان، دانشكده منابع طبيعي

1389

دوازده،90ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

مهدي بصيري، حسين بشري

مصطفي سعيد فر

18/10/89

مصطفي تركش، مجيد ايرواني

مهندسي منابع طبيعي

ID5236

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Evaluation of Six Rang Condition Methods in Four Rang Sites in Esfahan Province Elham Manouchehri emanoochehri@yhoo com Date of Submission August 7 2010 Department of natural resources Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language farsi Supervisor s Mehdi Basiri bassiri me@yahoo com Hossein Bashari H bashari 2001@yahoo com Abstract Range condition shows how vegetation and soil in the rangeland are affected by living and non living factors The proper assessment of rangeland condition can indicate the success or failure of management practices For evaluating rangeland condition in different ecological zones different methods indices and criteria are used In this study six methods for range condition assessment were evaluated including Four factors Adjusted four factors Frequency Reference proposed by Saeedfar 2002 Australian ABCD and Adjusted Australian Australian method was adjusted based on the study area characteristics and forage production Advantages and disadvantages of these methods were also evaluated Two approaches were used to compare methods under study First the range sites were observed and evaluated visually by 3 experts and then compared with condition classes obtained by each method Second if majority of the methods determined one particular condition classes similarly then it was concluded that these methods had good performance In the next step four criteria for determination of range condition for all methods were selected and then the methods were compared using Analytical Hierarchical Process AHP Then the methods were evaluated based on ranking of these criteria Accuracy objectivity speed ease of use and appropriateness of score range were the criteria used for this purpose Expert choice software was used to perform AHP Measurement and evaluation were conducted in two sites in steppes and two sites in semi steppes ecological zones in Isfahan province The results indicated that in semi steppe zone Adjusted Australian Frequency and Four factors methods and in steppe zone Frequency and Reference methods were appropriate respectively AHP also determined that the Frequency was the best method in terms of objectiveness and speed ease of use Also the Adjusted Australian method had good performance in terms of accuracy and appropriateness of score range Considering all of the criteria the frequency method was generally the best method However this method depends highly on factors such as plot and sample sizes and some vegetation characteristics The lack of objectivity to determine range site condition classes as control is among the limitations of this type of study Key Words Range condition analytical hierarchical process evaluation production esfahan

مهدي بصيري، حسين بشري

مصطفي سعيد فر

مصطفي تركش، مجيد ايرواني