Effects of sewage sludge stabilization on organic-N mineralization in two soils
RS Correa, RE White, AJ Weatherley
SOIL USE AND MANAGEMENT | WILEY | Published : 2012
Sewage sludge is a valuable source of organic matter, N, P and certain micronutrients that have beneficial effects on plant growth and biomass production. However, sanitary regulations often require the stabilization of sewage materials prior to applying them to soils as biosolids. Environmental regulations also demand appropriate management of biosolid-N to avoid groundwater contamination. Because stabilization processes usually make sewage sludge less putrescible, we hypothesized that the mineralization rates of organic-N from stabilized biosolids would be affected. Therefore, this study aimed to evaluate the mineralization of five biosolids in two soils - a sandy Spodosol and a clayey Oxi..View full abstract
The authors thank the financial support given by CNPq and the referees who improved the quality of the manuscript.