پديد آورنده :
كياني، فرشاد
عنوان :
اثر جنگل تراشي و تغيير كاربردي اراضي بر شاخص هاي كيفيت خاك و ارزيابي مدل LISEM در برآورد فرسايش و رسوب حوزه پاسنگ استان گلستان
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي
صفحه شمار :
پانزده، 159، [II] ص: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
احمد جلاليان، عباس پاشائي اول
استاد مشاور :
حسين خادمي، مصطفي كريميان اقبال
توصيفگر ها :
لس , هولوسن , مينرالوژيكي , مدل ليسم , ميكرومورفولوژي
تاريخ نمايه سازي :
2/5/86
استاد داور :
علي ابطحي، شهلا محمودي، محمد علي حاج عباسي، حميدرضا كريم زاده
كد ايرانداك :
ID174 دكتري
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتال
چكيده انگليسي :
Abstract Deforestation and land use change seem to have created serious problems inGolestan province north of Iran The objectives of this study were to evaluate the effectof deforestation grazing exclusion and rangeland degradation on soil quality attributesin loess derived landforms The results were shown that Loess soil sequences in studyarea have been proven to be excellent paleoclimate archives The results showed that theamount of organic matter decreased three units when it turns from forest to farmland and increased two units from farmland to rangeland The amount of CaCO3 in surfacelayer of deforested area was more than the forest soils The amount of soil N in forestand soil P and K in rangeland were high Root decomposition and uptake by plants hadan important role on distribution of N Bulk density and porosity in forest and MWD inrangeland were higher than in other land uses because of the decrease in organic matterdue to farming activities Soil respiration in forest was highest as compared to otherland uses Decomposition of organic matter in farmland with no addition of plantresidues have caused low respiration rate Different enzymes activities L asparaginaseand Dehydrogenase compared to microbial respiration indicate that enzymes contributeto specific biological processes while soil microbial respiration basically depends on thegeneral activity of soil microbial population Different quality of the plant residues indifferent ecosystems may also create different impacts on biological indices It could beconcluded that amount of organic matter soil N bulk density porosity MWD soilrespiration and enzymes activities are suitable indicators for soil quality evaluation inthis area Calibration of the LISEM soil erosion model for Pasang catchment showedthat the LISEM model can simulate runoff and soil loss from the catchment Soil losseswere estimated bu model and were differed from 85 to 1595 Kg ha according torainfall amounts The effect of a number of land use and land management scenarioswas simulated with LISEM The simulation predicted that an increase in erosion amountabout 21 was reached by changing of forest to current land uses Decrease in soil loessamount of about 30 could be reached by implementing conservation methods andexclusion in farmland and degradated rangelands
استاد راهنما :
احمد جلاليان، عباس پاشائي اول
استاد مشاور :
حسين خادمي، مصطفي كريميان اقبال
استاد داور :
علي ابطحي، شهلا محمودي، محمد علي حاج عباسي، حميدرضا كريم زاده
