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Revista Ciência Agronômica

On-line version ISSN 1806-6690

Abstract

SOUZA, Henrique Antunes de; MARCELO, Adolfo Valente  and  CENTURION, José Frederico. Organic carbon and aggregation in a oxisol in mechanized harvesting of sugarcane. Rev. Ciênc. Agron. [online]. 2012, vol.43, n.4, pp. 658-663. ISSN 1806-6690.  http://dx.doi.org/10.1590/S1806-66902012000400006.

The intensive use of land for the cultivation of sugarcane significantly modifies the physical properties of the soil. Therefore, the objective was to evaluate the effect of sugarcane management with mechanized harvesting on the aggregation of a typical Oxisol with a clay-like texture located in Guariba, São Paulo. With the sugarcane harvested mechanically and without prior burning, four different situations (cycles) were selected: plant cane, and first, second and third-cutting ratoon cane. Layers at a depth of 0 to 0.1, 0.1 to 0.2 and 0.2 to 0.3 m were evaluated for weighted mean diameter of the aggregates (WMD), and levels and stocks of organic carbon in the soil. Management of cane sugar with mechanized harvesting influences the soil WMD, whose values are greater for the plant cane and go down over the years. With the increase in soil depth, carbon stocks are more related to soil bulk density than to the carbon content.

Keywords : Saccharum officinarum; WMD; carbon stock; physical attributes.

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