4109

3884

كارشناسي ارشد

خاكشناسي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي

1386

پانزده، 141، [II]ص.: مصور، جدول، نمودار

ص.ع. به فارسي و انگليسي

حسين شريعتمداري، محمود كلباسي

يحيي رضايي نژاد

05/06/87

مجيد افيوني، علي اكبر رامين

مهندسي كشاورزي

ID3884

به فارسي و انگليسي: قابل رؤيت در نسخه ديجيتال

Abstract Iron deficiency chlorosis is the most widespread deficiency among the plant nutrients Nomadays different materials such as inorganic salts organic chelates soil acidifying materials and industeiral wastes are used to correct iron deficiency Slag and converter sludge of steel factories are among the inudsterial wastes for this purpose These materials contain considerable amount of iron and produced in large quantity every year Application of slag and converter sludge to soil may affect bioavailability and chemical forms of iron in soil It was therefore the objective of this study to investigate the effect of 3 years consequtive application of slag and converter sludge of esfahan iron melting factory on the chemical forms of iron distributon of this forms and bioavailability of iron in 3 soils The study was conducted in 3 fields namely Khazaneh Lavark and Shervedan Each plot received 3 treatments control 4 times critical level as slag S40 and converter sludge L40 in 3 replications for one two and three years Sample were collected from 0 20 and 20 45 cm depth and were analyzed for the chemical forms of iron using Tessier and Shuman method and bioavailable iron using DTPA TEA extractant More than 99 of the applied Fe occured in the residual Fe oxide and hydroxide and free forms The order of the chemical forms in Khazaneh field were residual bound to Fe oxide and hydroxide free iron amorphous iron bound to crystalline Mn oxide soluble iron bound to organic matter exchangeable Fe carbonate Fe In Lavark and Shervedan fields the order was the same with the exeption that carbonate Fe was more than exchangeable Application of slag for 2 and 3 consequtive years increased soluble and exchangeable Fe at surface and subsurface soil of 3 fields Application of slag and converter sludge for 2 and 3 consequtive years increased Fe bound to organic matter and at the same time decreased carbonate Fe at surface and subsurface soils of 3 fields Application of converter sludge for 3 consequtive years increased residual Fe iron bound to Fe oxides and hydroxides free Fe amouphous Fe and iron bound to crystalline Mn oxide for 3 fields Application of converter sludge for 3 consequtive years increased bioavailable DTPA extractable iron for boths depths of Khazaneh and Lavark fields and for 0 20 cm of shervedan field Applicaton of slag for 3 years however increased DTPA extractable Fe of shervedan field only for 0 20 cm depth pdfMachine A pdf writer that produces quality PDF files with ease Produce quality PDF files in seconds and preserve the integrity of your original documents Compatible across nearly all Windows platforms if you can print from a windows application you can use pdfMachine Get yours now

حسين شريعتمداري، محمود كلباسي

يحيي رضايي نژاد

مجيد افيوني، علي اكبر رامين