8498

7879

كارشناسي ارشد

خاكشناسي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي

1392

پانزده،109ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

حسين شريعتمداري

اميرحسين خوشگفتارمنش

13/11/92

مژگان سپهري، پرويز احسان زاده

مهندسي كشاورزي

ID7879

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Application of an Agricultural Steel Slag as an Iron Fertilizer for Corn Zahra Rafieian Isfahani r zahra1368@yahoo com September 22 2013 Department of Soil Science Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor H Shariatmadari Prof shariat@cc iut ac ir Abstract Iron deficiency is one of the most common plant nutritional problems in calcareous soils worldwide Iron is the 4th most abundant element in soils but due to a very low solubility specially in arid and semi arid soils the plant available Fe is much less than the plants need Iron deficiency induces chlorosis in young leaves of plants Different methods are being applied to manage the plant iron deficiency among which application of synthetic Fe chelates is very common however the high cost makes these compounds not affordable for the farmers Therefore it is necessary to find more effective and cheaper alternatives In previous studies the effects of steel slag application as an iron fertilizer were investigated In the present work the effects of using agricultural slag on some soil properties and plant element uptakes were studied The compound has an alkaline pH and contains about 49 50 of lime 7 8 percent iron 2 23 zinc and 3 3 of magnesium This study was conducted in two stages as incubation and greenhouse experiments Corn single cross 704 is used as the test plant The results of incubation experiment showed that the slag application increased soil pH slightly and increased AB DTPA extractable iron manganese and zinc Lead and Ni in the soil were also increased slightly as compared to the control But the extractable Cu reduced in soil due to the application of slag The results of pot experiment showed that application of slag 1 organic matter increased the shoot and root dry weight of corn The highest iron uptake of shoots was observed in slag 1 organic matter while different levels of slag and slag 1 organic matter increased the root Fe uptake It seems that although the slag and slag organic matter treatments increased the root iron uptake but the transfer of Fe from root to shoot was not increased effectively The application of slag increased Zn but decreased Cu and Mn uptake While the effect on lead and nickel uptake was different The results of this work may propose the agricultural slag as a possible iron fertilizer in avable lands Keywords agricultural slag calcareous soils iron chlorosis iron fertilizer

حسين شريعتمداري

اميرحسين خوشگفتارمنش

مژگان سپهري، پرويز احسان زاده