| Full text | |
| Author(s): |
De Maria, Isabella Clerici
[1]
;
Chiba, Marcio Koiti
[1]
;
Costa, Alan
[2]
;
Berton, Ronaldo Severiano
[1]
Total Authors: 4
|
| Affiliation: | [1] Inst Agron IAC, Ctr Solos & Recursos Ambientais, BR-13020902 Campinas, SP - Brazil
[2] Univ Estadual Ctr Oeste UNICENTRO, Fac Agron, BR-85040080 Guarapuava, PR - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | Revista Brasileira de Ciência do Solo; v. 34, n. 3, p. 967-974, MAY-JUN 2010. |
| Web of Science Citations: | 10 |
| Abstract | |
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. (AU) | |