Soil aggregation in a crop-livestock integration system under no-tillage
Data(s) |
01/08/2010
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Resumo |
Grazing intensities can influence soil aggregation, which can be temporarily and permanently affected. The objective of this study was to evaluate the aggregate stability in water at the end of a soybean cycle and during pasture development in a crop-livestock integration system under no-tillage and grazing intensities. The experiment was initiated in 2001, in a dystrophic Red Latosol, after soybean harvest. Treatments consisted of pasture (black oat + Italian ryegrass) at heights of 10, 20 and 40 cm, grazed by young cattle, and a control (no grazing), followed by soybean cultivation, in a randomized block design. Soil samples were collected at the end of the soybean cycle (May/2007), during animal grazing (September/2007) and at the end of the grazing cycle (November/2007). The grazing period influences aggregate distribution, since in the September sampling (0-5 cm layer), there was a higher proportion of aggregates > 4.76 mm at all grazing intensities. Soil aggregation is higher in no-tillage crop-livestock integration systems in grazed than in ungrazed areas. |
Formato |
text/html |
Identificador |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000400033 |
Idioma(s) |
en |
Publicador |
Sociedade Brasileira de Ciência do Solo |
Fonte |
Revista Brasileira de Ciência do Solo v.34 n.4 2010 |
Palavras-Chave | #black oat #Italian ryegrass #mean weighted diameter #soil structure |
Tipo |
journal article |