Temporary effect of chiseling on the compaction of a Rhodic Hapludox under no-tillage


Autoria(s): Silva, Sâmala Glícia Carneiro; Silva, Alvaro Pires da; Giarola, Neyde Fabiola Balarezo; Tormena, Cássio Antonio; Sá, João Carlos de Moraes
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

04/11/2013

04/11/2013

2012

Resumo

Mechanical chiseling has been used to alleviate the effects of compaction in soils under no-tillage (NT). However, its effect on the soil physical properties does not seem to have a defined duration period. The purpose of this study was to evaluate the behavior of the bulk density (BD) and degree of compaction (DC) at different soil depths, after chiseling in no-tillage, for one year. The experiment was performed in Ponta Grossa, Paraná State, Brazil, using an Oxisol (Rhodic Hapludox). Bulk density and DC were previously measured in an area under NT for 16 years, then immediately after chiseling (CHI) in May 2009, six months after chiseling (CHI6M) in October 2009 and one year after chiseling (CHI12M) in May 2010. In the layers 0.0-0.10, 0.10-0.20 and 0.20-0.30 m, there was a significant BD reduction CHI and a marked increase CHI6M. The BD values measured CHI12M were similar to those before tillage. Chiseling reduced the DC in the layers 0.0-0.10 m and 0.10-0.20 m, but returned to the initial values one year later. During the evaluation periods CHI, CHI6M and CHI12M, the BD increased in the layer 0.30-0.40 m, compared with NT. The highest DC values were observed six months after chiseling; nevertheless the structural recovery of the soil was considerable, possibly due to the high degree of soil resilience and the influence of the wetting and drying cycles detected in the study period. The chiseling effects, evaluated by BD and DC, lasted less than one year, i.e., the beneficial short-term effects of chiseling on the reduction of the surface BD increased the risk of compaction in deeper soil layers.

Identificador

Rev. Bras. Ciênc. Solo, v.36, n.2, p.547-555, 2012

0100-0683

http://www.producao.usp.br/handle/BDPI/38519

10.1590/S0100-06832012000200024

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000200024&lng=en&nrm=iso&tlng=en

http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0100-06832012000200024&lng=en&nrm=iso&tlng=en

http://www.scielo.br/scielo.php?script=sci_pdf&pid=S0100-06832012000200024&lng=en&nrm=iso&tlng=en

Idioma(s)

eng

Publicador

Sociedade Brasileira de Ciência do Solo

Relação

Revista Brasileira de Ciência do Solo

Direitos

openAccess

Palavras-Chave #soil compaction #structure #soil quality #resilience #compactação do solo #estrutura #qualidade do solo #resiliência
Tipo

article

original article