Título:	Soil quality indicators under management systems in a Quilombola community in the Brazilian Cerrado
Autor(es):	Silva, Antonio Marcos Miranda Ramos, Maria Lucrecia Gerosa Nascimento, Robervone Severina de Melo Pereira do Silva, Alberto do Nascimento Silva, Stefany Braz Cardoso, Elke Jurandy Bran Nogueira Paula, Alessandra Monteiro de
ORCID:	http://orcid.org/0000-0002-6283-9843 http://orcid.org/0000-0002-4516-7352 http://orcid.org/0000-0003-4881-0347 http://orcid.org/0000-0003-3003-0414 http://orcid.org/0000-0001-7233-8527 http://orcid.org/0000-0003-4280-2514 http://orcid.org/0000-0002-9655-4977
Assunto:	Solos - manejo Quilombos
Data de publicação:	Nov-2019
Editora:	São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Referência:	SILVA, Antonio Marcos Miranda et al. Soil quality indicators under management systems in a Quilombola community in the Brazilian Cerrado. Scientia Agricola (Piracicaba, Braz.), Piracicaba, v. 76, n. 6, p. 518-526, nov./dez. 2019. DOI: http://dx.doi.org/10.1590/1678-992x-2018-0008. Disponível em: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001600518&lng=en&nrm=iso. Acesso em: 20 jan. 2020. Epub May 30, 2019.
Abstract:	Soil management systems exert different effects on soil attributes, especially on the organic matter content, and, consequently, the soil aggregation. The aim of this study was to evaluate the impact of different land uses practiced by quilombola family farmers on water stable aggregates, glomalin and organic carbon in soil aggregates. Soil samples were collected at depths of 0-10 and 10-20 cm from areas cultivated under the following management systems: 1) conventional corn plantation (MA), 2) cultivation of citrus trees intercropped with annual crops (AC) (a conservationist approach), 3) pasture of Brachiaria (Urochloa spp.) (PA), and, as reference, an area of the Cerrado (CR) free of any anthropogenic interference. The studied areas were evaluated in a completely randomized design, with five replications, in a subplot scheme. The plots were the management systems and the subplots the depths. Soil macro-aggregates were predominant at both depths and the aggregate stability indices were higher than 90 % for all management systems. Total organic carbon in the two aggregate classes (micro and macro-aggregates) correlated with the MWD (mean weight-diameter), but not with the easily extractable glomalin (EEG) related soil protein. Soil micro and macro-aggregates, EEG and MWD discriminated management systems and are important soil quality indicators. The carbon content in both micro-aggregates (C-MIC) and macro-aggregates (C-MAC) of the intercropped system (AC) was higher than in the CR. The soil attributes that best separated the areas were C-MIC, MWD and EEG in macro-aggregates for the depth of 0-10 cm, and EEG in micro-aggregates, together with MWD and C-MAC for the depth of 10-20 cm.
Unidade Acadêmica:	Faculdade de Agronomia e Medicina Veterinária (FAV)
DOI:	http://dx.doi.org/10.1590/1678-992x-2018-0008
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