Revegetation on a Removed Topsoil: Effect on Aggregate Stability

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorTaboada-Castro, M. Mercedes
dc.creatorAlves, M. Cristina
dc.creatorDo Nascimento, Vagner
dc.creatorTaboada-Castro, M. Teresa
dc.date2014-05-20T13:30:19Z
dc.date2016-10-25T16:49:27Z
dc.date2014-05-20T13:30:19Z
dc.date2016-10-25T16:49:27Z
dc.date2009-01-01
dc.date.accessioned2017-04-05T20:16:27Z
dc.date.available2017-04-05T20:16:27Z
dc.identifierCommunications In Soil Science and Plant Analysis. Philadelphia: Taylor & Francis Inc, v. 40, n. 1-6, p. 771-786, 2009.
dc.identifier0010-3624
dc.identifierhttp://hdl.handle.net/11449/10286
dc.identifierhttp://acervodigital.unesp.br/handle/11449/10286
dc.identifier10.1080/00103620802686916
dc.identifierWOS:000264218900059
dc.identifierhttp://dx.doi.org/10.1080/00103620802686916
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/858259
dc.descriptionThe construction of a large reservoir on the Parana River (Selviria, MS, Brazil) disturbed the soil of an extensive agricultural area in which between 5 and 8m of topsoil were removed. In this area, a restoration process was carried out using revegetation with green manure without or with amendments (for 4 years), crops (2 years), and Brachiaria decumbens cultivation for 6 years. The following treatments were used: control plots, T0 (residual subsoil) and T1 (soil tillage without culture); plots with green manure and without amendments: T2 (velvet bean) and T3 (pigeon pea); plots with green manure and with amendments: T4 (limed + velvet bean), T5 (limed + pigeon pea); T6 (limed + gypsum + velvet bean) and T7 (limed + gypsum + pigeon-pea). They were arranged in randomized blocks. After 13 years of rehabilitation process, when the soil was cultivated with brachiaria, the structural stability in three depths was evaluated. Organic-matter content and others chemical properties did not show any relationship with the stability of aggregates of the experimental area as measured by mean weight diameter (MWD). Significant differences between depths were found for MWD and the other parameters measured. Nevertheless, there were no significant differences observed between treatments, independent of the adopted system of revegetation. By taking an absolute value of MWD, the stability of superficial layer was observed in the following sequence: T7 T5 T6 T1 T2 T3 T4 T0. The control plot (T0) gave the lowest value of MWD (1.76mm) in relation to the plots in restoration process. Treatment T7 was the most effective in recovering the stability of aggregates (2.63mm). However, treatments T5 and T6 displayed a similar value. After 13 years of revegetation practices, a slight recovery of the stability was observed, although this is still lower than stability in soils of similar edaphic conditions in the original topsoil of experimental area.
dc.languageeng
dc.publisherTaylor & Francis Inc
dc.relationCommunications in Soil Science and Plant Analysis
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectAggregate stability
dc.subjectremoved topsoil
dc.subjectrevegetation
dc.subjectsaprolite
dc.subjectsoil restoration
dc.titleRevegetation on a Removed Topsoil: Effect on Aggregate Stability
dc.typeOtro


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