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- Title
Soil quality indicators under management systems in a Quilombola community in the Brazilian Cerrado.
- Authors
Silva, Antonio Marcos Miranda; Ramos, Maria Lucrecia Gerosa; de Melo Pereira do Nascimento, Robervone Severina; do Nascimento Silva, Alberto; Silva, Stefany Braz; Nogueira Cardoso, Elke Jurandy Bran; de Paula, Alessandra Monteiro
- 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 macroaggregates) 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.
- Subjects
SOIL quality; SOIL structure; HISTOSOLS; SOIL management; CARBON in soils; ANTHROPOGENIC soils; GRASSLAND soils
- Publication
Scientia Agricola, 2019, Vol 76, Issue 6, p518
- ISSN
0103-9016
- Publication type
Article
- DOI
10.1590/1678-992X-2018-0008