7353

6859

كارشناسي ارشد

مرتعداري

اصفهان: دانشگاه صنعتي اصفهان، دانشكده منابع طبيعي

1391

چهارده، 130ص.: مصور، جدول، نمودار

ص.ع. به فارسي و انگليسي

حميد متين خواه

فرشيد نوربخش

13/9/91

مصطفي تركش ، محسن سليماني

1396/09/21

كتابنامه

منابع طبيعي

مهندسي منابع طبيعي

ID6859

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

The role of two hackberry species Celtis spp as nitrogen fixation trees on understory s soil and criterion plant Somayeh Dehnavi smy 12@yahoo com Date of submission 18 09 2012 Department of Natural Resources Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor Dr Seyedhamid Matinkhah Email address matinkhah@cc iut ac irAbstractNitrogen fixing trees or trees that have the ability to sequestrate nitrogen in soil could increase theorganic matter in understory s soil Hackberry tree species found abundantly in the northern and centralregions of Iran These nitrogen fixing trees are multipurpose by ability in producing forage timber fuel food medicine High growth rate resistance to air pollution salinity cold wind and storm and nitrogenfixation activity of these two species are characters that make them suitable for the restoration of thedegraded rangelands and forests Trees Celtis australis and Celtis caucasica are two nitrogen fixingtree species NFTs of hackberry genus where there are naturel or planting and able to improve themicroclimate The studied trees located in two county of Iran C caucasica growing in reserved area inAedasteh Dehaghan in Isfahan County and C australis planted in Imamzadeh Abdollah Amol inMazandaran County This study aimed to investigate the effects of C australis and C caucasica onthe physical and chemical characteristics of understory soil In this study to achieve the goals theunderstory soil of C australis and C caucasica and control at three depths 0 20 20 40 and 40 60 cmwith five observations were analyzed based on Block comlete randomized experiment The studiedparamters include Inorganic nitrogen total nitrogen organic carbon percentage lime EC pH soiltexture and critorion plant analysis to test the effect of trees on the amount of total nitrogen protein andproduction of ceritorion plant growing on the samples soils In order to establish the equal condition inthe test a touchstone plant was chosen and planted in the areas dominate by Celtis australis and Celtiscaucasica trees and also the pich up the testimonal sample In order to study the rate of effectiveness of Celtis australis and Celtis caucasica trees on the associate plants Lepidium sativum was selectedas the touchstone plant Lepidium sativum or Garden cress is a fast growing plant and has short groethperiod Nitrogen fixing trees have the ability to fix nitrogen into inorganic nitrogen or nitrate that isusable by plants Therefore we can see that effects in two Celtis spicies in this study Aproximately in allthe studied parameters the two tree had a sighnificantly different effect on the soil and both respect to thecontrols This show the high potential and positive effect of NFTs on soil quality compare to theuncovered areas Overall the highest amounts of lime inorganic nitrogen soil total nitrogen and organiccarbon percentage was gained in depth 0 20 cm understory of two hackberry species and then increasingwith depth Keywords Celtis caucasica Celtis australis Nitrogen fixing trees Canopy cover Understory Criterion

حميد متين خواه

فرشيد نوربخش

مصطفي تركش ، محسن سليماني