Soil attributes as indicators of the stabilization process of erosion in gullies at different formation stages in the southeast region of Brazil

Water erosion is one of the main forms of soil degradation, causing economic, environmental, and social damage. This study evaluated the effects of different formation stages of gullies (initial - IG; juvenile- JG; mature - MG; and senile - SG) on the chemical, organic carbon and microbiological attributes of soil, using a secondary forest (SF) and two areas of pasture as references in the ?Mar de Morros? environment of the Brazilian Atlantic Forest biome. Soil samples (depth 0?0.05 m) were collected at the end of the rainy and dry seasons. Gullies in different stages of formation promote a decrease in soil fertility and modification of microbiological attributes, particularly when compared with secondary forest areas. Reductions of over 60% in total organic carbon (TOC), oxidizable organic carbon (POXC), FDA activity, β-glycosidase, acid phosphatase, C and N from microbial biomass, basal soil respiration (BSR) and glomalin-related soil protein (GRSP) were observed in gullies in early (IG) and intermediate (JG and MG) stages when compared to SF. It was found that the effect of erosion on soil chemical and microbiological attributes is more intense in gullies in the initial and intermediate stages compared with those in the senile stage (SG). Using multivariate PCA, the microbiological and chemical attributes of the soil are discriminated between gullies with distinct formation stages. Chemical attributes, TOC, POXC, FDA activity, β-glycosidase, acid phosphatase, MBC and MBN, BSR, and GRSP are good indicators for evaluating the process of erosion stabilization in gullies.

Bibliographic Details

Main Authors:	SILVA, C. F. da, PEREIRA, M. G., RODRIGUES, L. A. da S., TEODORO, S. A., MARCELO ANTONIOL FONTES, GAIA-GOMES, J. H., SILVA, E. M. R. da
Other Authors:	CRISTIANE FIGUEIRA DA SILVA, UFRRJ; MARCOS GERVASIO PEREIRA, UFRRJ; LUIZ ALBERTO DA SILVA RODRIGUES, UFRRJ; SABRINA APARECIDA TEODORO, UFRRJ; MARCELO ANTONIOL FONTES, CNPAB; JOÃO HENRIQUE GAIA-GOMES, UFRRJ; ELIANE MARIA RIBEIRO DA SILVA, CNPAB.
Format:	Artigo de periódico biblioteca
Language:	Portugues pt_BR
Published:	2021-12-16
Subjects:	Enzymatic activity, Soil microbial biomass, Floresta Atlântica, Soil organic carbon, Oxisols, Water erosion,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1137991 https://doi.org/10.4136/ambi-agua.2632
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