Resumo

HERNANDEZ-VIGOA, Guillermina et al. Edaphic indicators after the conversion of a grassland area into agroecological systems . Pastos y Forrajes [online]. 2018, vol.41, n.1, pp. 3-12. ISSN 2078-8452.

The objective of the study was to evaluate the conversion of a grassland area into a forage and a polycrop area with the application of agroecological methods, through different soil biological, physical and chemical variables, in a farm with animal husbandry-agriculture integration in the Cangrejeras locality Artemisa province, Cuba. The total macrofauna and mesofauna; functional groups of epigeal, anecic and endogeal species of the macrofauna; oribatids, uropodines and gamasines of the mesofauna; underground phytomass; hydrosoluble carbon content; microbial biomass; activity of the dehydrogenase and acid phosphatase enzymes; total organic carbon; percentage of stable aggregates and apparent soil density, were studied. The relation among the variables and their contribution to the grassland conversion were explored by the principal component analysis. From the 16 evaluated variables, only nine (epigeal and endogeal macrofauna, oribatid and uropodine mesofauna, total organic carbon and hydrosoluble carbon, acid phosphatase enzyme, percentage of aggregates and apparent soil density) were recommended for the integral analysis of soil quality and of the impact of the land use change. The integrated analysis of all the variables, according to their correlations and the system arrangement, showed that the conversion from grassland to forage was a favorable agroecological practice for the conservation of soil quality and sustainable soil use; while crop sowing and rotation (polycropping) affected quality.

Palavras-chave : exploitation systems; soil conservation; soil fauna.

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