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Revista Brasileira de Ciência do Solo

versão On-line ISSN 1806-9657

Resumo

GIACOMINI, Sandro José; AITA, Celso; MIOLA, Ezequiel César Carvalho  e  RECOUS, Sylvie. Carbon mineralization of straw and pig manure with and without incorporation in soil. Rev. Bras. Ciênc. Solo [online]. 2008, vol.32, n.spe, pp.2661-2668. ISSN 1806-9657.  http://dx.doi.org/10.1590/S0100-06832008000700008.

The C mineralization of pig manure and cereal straw is still relatively little studied in Brazil. The aim of this work was to evaluate C mineralization of oat straw, pig slurry and pig deep-litter, applied on the surface or incorporated in a Hapludalf soil, in laboratory conditions. The experiment was a completely randomized design with four replications of the following treatments: soil; soil + incorporated straw; soil + surface straw; soil + incorporated pig deep-litter; soil + surface pig deep-litter; soil + incorporated pig slurry; soil + surface pig slurry; soil + incorporated straw + pig slurry; and soil + surface straw + pig slurry. During the 80 days of incubation, the CO2 emission was measured continuously. After this period, 59 % of pig slurry C had been mineralized and only 23 % of deep-litter C. The soil incorporation of organic materials did not result in higher C mineralization, compared with organic material on the soil surface. Ammoniacal N, applied with pig slurry did not increase C oat straw mineralization.

Palavras-chave : decomposition; microbial activity; organic fertilizers; CO2 emission.

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