پديد آورنده :
ذوالفقاري، علي اصغر
عنوان :
تاثير تبديل كاربري اراضي مرتع و جنگل به زمين زراعي بر ساختمان، مواد آلي و دفع آب خاك
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي
صفحه شمار :
پانزده، 102، [II] ص.: جدول، نمودار
يادداشت :
ص. ع. به فارسي و انگليسي
استاد راهنما :
محمدعلي حاج عباسي
استاد مشاور :
مجيد افيوني، حسين خادمي
توصيفگر ها :
انبار كربن , چگالي ظاهري , فركتال , MWD
تاريخ نمايه سازي :
27/4/86
استاد داور :
اميرحسين خوشگفتارمنش، خورشيد رزمجو
تاريخ ورود اطلاعات :
1396/02/30
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتال
چكيده انگليسي :
AbstractIncreasing of population growth rate and need for food forced farmers to invademarginal lands like pastures and forests with little crop potential In last four centuriesabout 30 of lands of forests and pastures are changed to cultivation lands This hadlead to removing soil organic matter and increasing CO2 production and its emissioninto atmosphere Changing in land use has also lead to degradation of soil structure This study investigated the effects of changing forest and pasture into crop lands onorganic matters and some physical properties of soil Two locations of Fraidan aspasture and Lordegan as forest were used In each area two land use was selected One under cultivation and other one was unaltered In each land use three sites wereselected and in each site three depth 0 1 1 5 and 5 15 centimeter were sampled Soiltexture percent of organic matter electrical conductivity and soil pH were determinedon disturbed samples and aggregates stability hydraulic conductivity and bulk densitywere determined on the undisturbed soil samples Soil water repellency was determinedboth in laboratory and field Fractal dimension was used for evaluation of aggregatestability and was compared with mean weigh diameter Result showed that change inland use had significant effect on some of measured parameters Intensity of thesechanges were higher in forest Also soil water repellency was found just in unsaltedforest With increasing soil organic matters soil water repellency intensity wasincreased Fractal dimension was increased in forest and pasture with change in landuse The most fractal dimension was found in unalter pasture comparing CVs betweenfractal dimension and mean weight diameter showed that fractal dimension is a betterindex than mean wight diameter and had more accuracy Because of high correlationsbetween fractal dimension and measured parameters it can be said that fractaldimension is a more suitable index for evaluation of soil decomposition with change inland use
استاد راهنما :
محمدعلي حاج عباسي
استاد مشاور :
مجيد افيوني، حسين خادمي
استاد داور :
اميرحسين خوشگفتارمنش، خورشيد رزمجو
