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Revista Brasileira de Ciência do Solo
Article . 2012 . Peer-reviewed
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Revista Brasileira de Ciência do Solo
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Resiliência física de dois latossolos vermelhos sob plantio direto

Authors: Bavoso, Marina Araújo; Silva, Alvaro Pires da; Figueiredo, Getulio Coutinho; Tormena, Cássio Antonio; Giarola, Neyde Fabíola Balarezo;

Resiliência física de dois latossolos vermelhos sob plantio direto

Abstract

A resiliência física de solos é proveniente de processos regenerativos que incluem ciclos de umedecimento e secamento, congelamento e descongelamento, assim como as atividades biológicas. Este estudo testou a hipótese de que as propriedades físicas do solo, como a permeabilidade do solo ao ar, densidade do solo, porosidade de aeração e porosidade total, são indicadores físicos eficientes para quantificar a resiliência de solos de diferentes texturas submetidos ao estresse mecânico (compactação) e após subsequentes ciclos de umedecimento e secamento. O objetivo foi avaliar o comportamento e a resiliência do solo por meio de propriedades físicas de dois Latossolos Vermelhos. Foram retiradas 25 amostras indeformadas (0,00-0,05 m) de dois solos: solo I, com textura argilosa, e solo II, com textura franco-argilo-arenosa, realizando as determinações das propriedades físicas nos tratamentos: antes da compactação (A), depois da compactação (C0) e após ciclos de umedecimento e secamento (C1, C2, C3 e C4). As propriedades densidade do solo e porosidade total não apresentaram recuperação da condição inicial após a compactação nos solos I e II; as propriedades conteúdo volumétrico de água e porosidade de aeração mostraram recuperação parcial apenas no solo I; e a permeabilidade do solo ao ar foi a propriedade que apresentou a melhor recuperação e a maior resiliência. Em relação ao distinto comportamento dos dois solos, observou-se que o solo I foi mais resiliente que o solo II nas propriedades que apresentaram recuperação.

Keywords

soil compaction, permeabilidade do solo ao ar, ciclos de umedecimento e secamento, Agriculture (General), wetting and drying cycles, compactação, soil air permeability, S1-972

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    Top 10%
    influence
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
12
Top 10%
Average
Average
Green
gold