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http://hdl.handle.net/11607/2635
Title: | Mineralization of five biosolids in two tropical soils |
Authors: | Corrêa, Rodrigo Studart White, Robert E. Weatherley, Anthony J. The University of Brasília |
Issue Date: | 2008 |
Publisher: | Adnan Menderes Üniversitesi Ziraat Fakültesi Dergisi |
Citation: | Corrêa, S. R., White, E. R., Weatherley, J. A. (2008). Mineralization of five biosolids in two tropical soils. International Meeting on Soil Fertility Land Management and Agroclimatology, Special Issue, 141-156. |
Abstract: | This work aimed to evaluate mineralization rates of the five most common biosolids (digested sludge, composted sludge, limed sludge, heat-dried sludge, and solar-irradiated sludge) when incubated to two tropical soils - a Spodosol and an Oxisol soil. Fresh sludge and stabilized biosolids were mixed with soil samples at 0.5, 1.0, 2.0, 4.0, 6.0 and 8.0 dry t biosolids/ha and incubated at 25oC in a high humidity chamber (95% air moisture), at 12 hours light/day, during 23 weeks for a non-leaching experiment. Results have showed that all the stabilization processes altered the capacity of the fresh sludge to release mineral-N. Except solar-irradiated sludge, the stabilization processes hindered the release and accumulation of mineral-N in soils. Composting and CaO-liming were the processes that most reduced the release of mineral-N. Mineralization rates and mineral-N release from biosolids were always higher in the Ferrosol compared to Spodosol soil. |
URI: | http://hdl.handle.net/11607/2635 |
Appears in Collections: | 2009 Özel Sayı |
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