Resumo

FLORES-SANCHEZ, Brenda et al. Solarized manure amendments in aggregate stability of cultivated Aridisol from Mexico. Rev. Mex. Cienc. Agríc [online]. 2015, vol.6, n.7, pp.1543-1555. ISSN 2007-0934.

Arid soil regions receive solarized manure amendments, but their effect on soil aggregate stability is unknown. The obj ectives of this study were: 1 ) characterize anAridisol with eight years of solarized manure amendments; and 2) identify the physical or chemical factors influencing aggregate stability. Two sites with similar soils were selected; one with amendments and one without them. Trial pits were dug describing place and profile; taking also samples from horizons for analysis and characterization. Physical and chemical analyses were made to each sample to classify them. Besides, manure samples were analyzed, thus soil aggregates stability of the surface layer (0-30 cm) of each soil sample. Data from clay content, organic matter and calcium carbonates, related to aggregate stability to identify factors influencing their stability. An analysis of variance from the models obtained was conducted, as well as Tukey (p≤ 0.05). The results show that aggregates stability of a Fluventic Haplocambids are different, as soils with amendment had an aggregate stability (11.6%) higher than those soils without amendment (8.2%), such that in the first, organic matter content influenced stability and in the second calcium carbonate content. However, soil aggregates stability was low due to the characteristics of solarized manure.

Palavras-chave : Fluventic Haplocambids; organic farming; organic matter; soil structure.