Resumo

URIBE-VALLE, G.  e  PETIT-ALDANA, J.. SHORT FALLOWS CONTRIBUTION TO RECUPERATE SOIL FERTILITY IN MILPAS OF YUCATAN, STATE, MEXICO. Rev. Chapingo ser. cienc. for. ambient [online]. 2007, vol.13, n.2, pp.137-142. ISSN 2007-4018.

In the year 2006 Yucatan State was settled down approximately 167, 000 hectares with shifting cultivation, in maize associations with beans, pumpkin and vegetables, with different fallow periods afterward three years of use. The objective of this work was to determine the chemical behavior of the soils, by evaluating two leguminous species and two short fallow periods, as well as the phase of maize crop. In three types of vegetal cover; Leucaena leucocephala, Mucuna pruriens and secondary vegetation, with two and four years of fallow, a completely randomized design with four repetitions was established and the nutriment quantities in three intervals were determined: 1998 after two years of established the fallows of four years, 2001 when being complete the fallows of two and four years and starting the maize crop phase and 2004 three years of continuous land use. At the end of the fallow periods, Leucaena improved K, Ca and Mg quantities, while Mucuna the NO3 and the secondary vegetation the organic matter. Fallow of two years registered superior values in organic matter content, NO3 and K, when comparing with 4 years fallow, that better than the two years in Mg.

Palavras-chave : shifting cultivation; chemical behavior; nutriments; Leucaena leucochephala; Mucuna pruriens; secondary vegetation.

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