Sewage sludge application to agricultural land as soil physical conditioner

Revista Brasileira de Ciência do Solo

Isabella Clerici De Maria²  Márcio Koiti Chiba²  Alan Costa¹  Ronaldo Severiano Berton² 

[1] ,Instituto Agronômico Centro de Solos e Recursos Ambientais Campinas SP

关键词: soil quality;    bulk density;    soil permeability;    qualidade do solo;    densidade do solo;    permeabilidade do solo;   

DOI  :  10.1590/S0100-06832010000300038

来源: SciELO

【 摘 要 】

Water resource quality is a concern of today's society and, as a consequence, low pollutant wastewaters and sludges are being increasingly treated, resulting in continuous production of sewage sludge. Sewage sludge (SS) can be used as soil physical conditioner of agricultural or degraded lands, due to its organic C component. The objective of this research was to evaluate the long-term SS effects on soil physical quality of properties such as bulk density, porosity, permeability and water retention of degraded soils treated with annual SS applications. The SS rates were calculated according to the crop N demand. The field experiment consisted of three treatments: mineral fertilization, 10 and 20 Mg ha-1 of SS (once and twice the SS quantity to meet the maize N demand, respectively), in annual applications to the surface layer of a eutroferric Red Latosol. SS reduced bulk density, increased macroporosity and decreased microporosity after the third application, but did not significantly alter the soil permeability and physical quality as measured by the S index in the surface layer.

【 授权许可】

CC BY   
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