4300

4071

كارشناسي ارشد

بيابان زدايي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده منابع طبيعي

1387

دوازده، 84، [II] ص.: مصور، جذول، نمودار

ص.ع. به: فارسي و انگليسي

مهدي بصيري، محمدرضا وهابي

مجتبي مدرس هاشمي

12/11/87

جمال الدين خواجه الدين، حميد متين خواه

مهندسي منابع طبيعي

ID4071

به فارسي و انگليسي: قابل رؤيت در نسخه ديجيتال

Abstract Vegetation conservation is one of the important parameters in successful range management Artemisia sieberi is one of the native species in dry regions in Iran but this species has not beenused for desert rehabilitation This study was conducted to investigate germination andestablishment characteristics of this species in germinator and greenhouse Natural establishmentand consumption by Goitered Gazelle the main herbivore species was also studied in Kolah GhaziNational Park near Isfahan Seeds were collected from 20 randomly selected mature plants along 6Km transect in study area After breaking dormancy all seeds were treated at 0 to 5 C for 9 days Pregermination cold treated seeds were used in 3 sets of germination experiments 1 droughtinduced by polyethylene glycol at 0 2 4 and 6 bars levels 2 application of 0 10 20 and 30percent of A sieberi foliage extracts on germinating seeds 3 germination under 12 hours light anddark periods and continue light or dark conditions Germination data were collected in a completerandom design and analyzed by SAS Germinated seeds were transplanted into plastic bags andplanted in field with 4 times irrigation during summer Crown cover and density of A sieberi weremeasured in 5 consecutive seasons along the 6 Km transect in 130 circular plots of 5 m2 area Forage consumption from this species by Gazelle was studied during 5 seasons Results indicatedthat germination under increasing drought levels reduced percent and rate of germination as well asreducing stem length and alometric ratios Increasing plant extract concentrations reduced percentand rate of germination as well as stem and root lengths In light compared to dark conditionpercent and rate of germination as well as root length were increased but alometric ratio and stemlength were reduced Sixty three percent of seeds were germinated in germination trays infavorable condition from which only 23 percent of seedlings were survived Transplanted seedlingsinto plastic bags had an establishment rate of 70 percent while transplanted seedlings from plasticbags into field had 75 survival resulting in over all 7 61 establishment rate from seeds According to A sieberi crown cover 3 sites were distinguished along the transect with about 1 2and 3 Km lengths Crown cover of A sieberi in 3 sites along transects were 2 17 0 58 and 1 98percent Maximum crown cover was measured in spring but was not correlated with maximumconsumption by wild life because there were many preferred plant species at that time Despite ofreduced crown cover of this plant increased consumption was observed during fall which wassimilar to consumption of A sieberi in winter In study sites density of seed producing plants of A sieberi was 0 48 but total density of this species was 1 94 in spring showing almost 3 4 ofplants were young seedlings which in favorable following season have potential to be established

مهدي بصيري، محمدرضا وهابي

مجتبي مدرس هاشمي

جمال الدين خواجه الدين، حميد متين خواه