پديد آورنده :
خياميم، فاطمه
عنوان :
رها سازي پتاسيم و تغييرات كاني شناسي فلوگوپيت و موسكويت تحت تاثير نوع گياه و قارچ اندوفايت
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي
صفحه شمار :
چهارده،112ص.:مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
حسين خادمي
استاد مشاور :
اميرحسين خوش گفتارمنش، شمس ا... ايوبي
توصيفگر ها :
ورمي كوليت و تغييرات كاني شناسي
تاريخ نمايه سازي :
29/3/89
استاد داور :
فرشيد نوربخش،آقا فخر مير لوحي
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Potassium Release and Mineralogical Changes of Phlogopite and Muscovite as Influenced by Plant Type and Endophyte Fungi Fatemeh Khayamim f khayamim@yahoo com February 21 2010 Department of Soil Science College of Agriculture Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiHossein Khademi hkhademi@cc iut ac irAbstractMineral weathering is the major source of most essential nutrients including potassium K Biological factorsare important in potassium release from K bearing minerals The objectives of this research were to investigatethe effect of plant type and endophyte fungi on potassium uptake from phlogopite and muscovite and to studythe mineralogical changes influenced by different plant rhizospheres A pot experiment was carried out undergreenhouse conditions in a completely randomized design with factorial combinations and three replications Barley alfalfa and tall fescue were tested in this study The culture medium was a mixture of quartz sand as thefilling material and phlogopite or muscovite Pots were irrigated with distilled water and complete or K freenutrient solution during a period of 140 days At the end of the experiment shoots and roots were harvested andtheir K concentration was determined Clay sized particles were analyzed using an X ray diffractometer Effectof plant type culture medium and nutrient solution on shoot and root dry weight potassium concentration andpotassium uptake was significant Under the K free nutrient solution phlogopite as a trioctahedral mica couldeasily provide enough K to all the three crops and the K concentration in barley and alfalfa was sufficient whereas the K concentration was below the sufficient limit in tall fescue But muscovite as a dioctahedral micacould not supply enough K for plants Among the crops tested the highest K uptake under K free nutrientsolution and in pots amended with phlogopite was recorded for barley followed by alfalfa and tall fescue Therewas a statistically significant difference in K uptake between E and E tall fescue plants in phlogopite amendedpots under the K free nutrient solution The strong vermiculitization of phlogopite was attested under bothnutrient solutions but with a much higher rate in the pots treated with the K free nutrient solution The rate ofmineral transformation was greatly affected by plant type and endophyte symbiosis Root system and theirexcretions are important factors creating differences in K uptake and mineralogical changes among crops Effects of plant type and endophyte symbiosis on pH values were significant This confirms the positive effectof the type and quantity of plant roots secretions on mineralogical transformations Endophyte fungi symbiosisaffected the plant excretions and increased the rate of non exchangeable and structural K release frommicaceous minerals In addition to vermiculite smectite and chlorite were detected as newly formed minerals inphlogopite amended pots Also a very weak vermiculitization of muscovite was recognized These resultsclearly indicate the influence of rhizospheric conditions and different plant excretions on mineralogicaltransformation Key words Phlogopite Muscovite Endophyte fungi Vermiculite X ray diffraction
استاد راهنما :
حسين خادمي
استاد مشاور :
اميرحسين خوش گفتارمنش، شمس ا... ايوبي
استاد داور :
فرشيد نوربخش،آقا فخر مير لوحي
