Borhand, M.

Esmaili Sharif, M.

Feyze, M. T.

Ghaedi, A.

Khodagholi, M.

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings 21st International Grassland Congress / 8th International Rangeland Congress Studies on the Autecology of Astragalus caragana F. et M in the Esfahan Province in Ira M. Khodagholi Esfahan Agriculture and Natural Resources Center, Iran M. Esmaili Sharif Esfahan Agriculture and Natural Resources Center, Iran A. Ghaedi Esfahan Agriculture and Natural Resources Center, Iran M. Borhand Esfahan Agriculture and Natural Resources Center, Iran M. T. Feyze Esfahan Agriculture and Natural Resources Center, Iran Follow this and additional works at: https://uknowledge.uky.edu/igc  Part of the Plant Sciences Commons, and the Soil Science Commons This document is available at https://uknowledge.uky.edu/igc/21/1-2/42 The 21st International Grassland Congress / 8th International Rangeland Congress took place in Hohhot, China from June 29 through July 5, 2008. Proceedings edited by Organizing Committee of 2008 IGC/IRC Conference Published by Guangdong People's Publishing House This Event is brought to you for free and open access by the Plant and Soil Sciences at UKnowledge. It has been accepted for inclusion in International Grassland Congress Proceedings by an authorized administrator of UKnowledge. For more information, please contact UKnowledge@lsv.uky.edu. 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅰ 　 瞯 ]91　 瞯Grasslands/Rangelands Resources and Ecology ——— Ecology of Grasslands/RangelandsStudi s on the autecology of Astragalus caragana F . et M in the Esfahan Province of IraM . K hodagholi , M . Esmaili Shari f , A . Ghaedi , M . Borhand , and M .T . Feyz eEs f ahan A griculture and Natural Resources Center , Es f ahan , I ran . E‐mail : M ＿ khodagholi＠ yahoo .comKey words : planting ,grazing value , semi steppic , vegetative spreadIntroduction The genus A stragalus is generally considered the largest plant genus of Iran with more than ８００ species ( Lock andSimpson , １９９１ ) . A stragalus caragana F . et M . is the most important species of this genus . A stragalus caragana isdistributed in semi steppic regions of Esfahan province . This paper presents the autecology and grazing value of A stragaluscaragana in Esfahan province .Materials and methods The study area is located in the semi steppic region of Esfahan Province in central Iran . The method ofresearch was a standard reconnaissance method including collection of botanical , pedological , phenological , and climatologicaldata as well as examining grazing preference values for the species and developing distribution maps .Results and discussion The results indicated that the species is distributed over ５６８ ,４００ ha of the western foothills of theProvince at elevations between １９７８ and ３３２０ m with ３００ to ７５０ mm precipitation and ７００ to １３００ mm evapotranspiration . Itoccurs on sandy to sandy loam soils with pH between ７ .３ and ７ .８３ and salinity between ０畅０５４ and ０畅２２ dsm‐１ . A stragaluscaragana covers about ３ .８％ of the ground in A stragalus spp . , A gropy ron spp . , A rtemisia aucheri , Cousinia cy lindlucea ,Scariola orientalis , Euphorbia spp ., Ferula ov ina , and Bromus tomentellus types . Phenological studies indicated that thevegetative grow th begins in March when the average temperature is above ０ ℃ and the minimum temperature for ３ days is above‐２ ℃ . The best time for grazing is from ２０ May to ５ Jun according to phenological studies . Due to its aromatic and phenoliccomponents , it receives little use early in the season , but it is intensively grazed in mid season .A stragalus caragana spreads via sexual and vegetative e propagation but most commonly spread occurs through development ofrhizomes due to pests . This results in a clumped distribution of the species . Weight of １０００ seeds is about ２０ .５ g with ２１ .５％germination and with ５８％ scarification ( does this mean hard seeds that must be scarified ?) . Interseeding in pitting are the bestways of revegetating the species . Seeds must planted ２ .５ cm deep , and germination of ８２％ can be expected .ReferencesEbrahimzadeh , H . , V . Niknam , and A .A . Maassoumi , (２００１) . The sterols of A stragalus species from Iran : GLC separationand quantification . Biochemical Systematics and Ecology ２９ :３９３‐４０４ .Khodagholi , M . , ( ２００４ ) . Evaluation of ecological regions of Iran : Plant types of Semirom region . Ranges and ForestsResearch Institute , No . ３４３ .e

Studies on the Autecology of \u3cem\u3eAstragalus caragana F. et M\u3c/em\u3e in the Esfahan Province in Ira

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Studies on the Autecology of \u3cem\u3eAstragalus caragana F. et M\u3c/em\u3e in the Esfahan Province in Ira

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