Resumo

YAGI, Renato; FERREIRA, Manoel Evaristo; CRUZ, Mara Cristina Pessôa da  e  BARBOSA, José Carlos. Organic matter fractions and soil fertility under the influence of liming, vermicompost and cattle manure. Sci. agric. (Piracicaba, Braz.) [online]. 2003, vol.60, n.3, pp. 549-557. ISSN 0103-9016.  http://dx.doi.org/10.1590/S0103-90162003000300021.

This work evaluates effects of cattle manure vermicompost in association with liming on soil fertility indexes. The experiment was carried out in greenhouse conditions, in pots containing samples of a Typic Hapludox, medium-textured soil. Five levels of vermicompost (equivalent to 0, 28, 42, 56, and 70 t ha^-1, dry weight) and five liming levels (to raise base saturation to 20, 30, 40, 50, and 60%) were combined in a factorial scheme and samples were incubated for 180 days. Samples of the same soil received the equivalent to 70 t ha^-1 of the cattle manure used to produce the vermicompost, and the same lime rates. Cattle manure was better than vermicompost to supply K and Mg. Small differences in P supply were observed between the manures. The vermicompost increased the levels of Ca, pH, organic matter (OM) and CEC more than the manure. C-humic acids decreased and C-humin increased with vermicompost application. With liming, C-humic acids decreased, but the total content of OM was not affected.

Palavras-chave : manure; pH; fulvic acids; humic acids; humin.