پديد آورنده :
ناهيدان، صفورا
عنوان :
تاثير تاريخچه مديريت كربن آلي خاك بر حساسيت آنزيم بتاگلو كوزيدار به فلزات سنگين
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي
صفحه شمار :
شانزده، 129، [II] ص: جدول، نمودار
يادداشت :
ص. ع به: فارسي و انگليسي
استاد راهنما :
فرشيد نوربخش
استاد مشاور :
مجيد افيوني
توصيفگر ها :
يونجه و فستوكا , لردگان , ايستگاه تحقيقاتي فزوه , بافر MUB
تاريخ نمايه سازي :
26/12/87
استاد داور :
محمد علي حاج عباسي، مهدي كديور
تاريخ ورود اطلاعات :
1396/09/07
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتال
چكيده انگليسي :
Abstract Soil organic matter is an index of soil quality and health Intensive cultivationwithout crop rotation deforestation residue burning and land use change have resultedin decreasing the soil C storage and hence on some soil biological properties Theobjectives of this study were to investigate i the effects of soil organic C managementhistory on the sensitivity of different pools of glucosidase to heavy metals ii kineticbehavior of the enzyme as affected by Pb contamination The soil samples werecollected from 0 15 cm depth of two regions 1 An oak forest with its cultivatedcounterpart in Lordegan region and 2 a soil under two long term cultivation of alfalfaand festuca in Fozveh region Net N mineralization L arginine ammonification microbial biomass C metabolic quotient microbial quotient glucosidase activity andthe enzyme activity to OC ratio were determined Results indicated that in the Lordeganregion most of the biological properties decreased significantly In the Fozveh regionthe biological properties were often higher in the soil under alfalfa cultivation Similarly potentially mineralizable C were also greater in forested versus cultivated andalfalfa versus festuca in the Lordegan and Fozveh regions respectively It was alsoobserved that the sensitivity of the stabilized pools of the enzyme were less sensitive tothe heavy metals except for Pb The kinetic parameters of glucosidase Vmax and Km were both decreased when the soils were contaminated with Pb and therefore a non competitive inhibition has happened by Pb to the enzyme Overall we can clearlyconclude that management practices may influence the sensitivity of glucosidase toheavy metals through changing the quantity and quality of the soil C storage Moreover the degrees of enzyme inhibition among different fractions of the soil enzyme pool werenot identical It was also concluded that Pb has a non competitive inhibition mechanismon soil glucosidase
استاد راهنما :
فرشيد نوربخش
استاد مشاور :
مجيد افيوني
استاد داور :
محمد علي حاج عباسي، مهدي كديور
