Soil quality indicators under management systems in a Quilombola community in the Brazilian Cerrado
| Autor: | Maria Lucrécia Gerosa Ramos, Antonio Marcos Miranda Silva, Alessandra Monteiro de Paula, Elke Jurandy Bran Nogueira Cardoso, Stefany Braz Silva, Alberto do Nascimento Silva, Robervone Severina de Melo Pereira do Nascimento |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Soil test 01 natural sciences Pasture Soil management SOLO DE CERRADO Urochloa Organic matter water-stable aggregates quilombo lcsh:Agriculture (General) Solos - manejo Total organic carbon chemistry.chemical_classification geography geography.geographical_feature_category biology soil protein 04 agricultural and veterinary sciences biology.organism_classification lcsh:S1-972 Soil quality Glomalin Agronomy chemistry Quilombos 040103 agronomy & agriculture biology.protein 0401 agriculture forestry and fisheries Environmental science Rhodic Hapludox 010606 plant biology & botany |
| Zdroj: | Scientia Agricola v.76 n.6 2019 Scientia Agrícola Universidade de São Paulo (USP) instacron:USP Scientia Agricola, Vol 76, Iss 6, Pp 518-526 Repositório Institucional da UnB Universidade de Brasília (UnB) instacron:UNB Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Scientia Agricola, Volume: 76, Issue: 6, Pages: 518-526, Published: 30 MAY 2019 |
| ISSN: | 1678-992X |
| DOI: | 10.1590/1678-992x-2018-0008 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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