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Aggregate and organic carbon distribution influenced by agroecological handling
- Source :
- Acta Scientiarum. Agronomy, Volume: 31, Issue: 3, Pages: 523-528, Published: SEP 2009
- Publication Year :
- 2009
- Publisher :
- Editora da Universidade Estadual de Maringá - EDUEM, 2009.
-
Abstract
- O objetivo deste estudo foi verificar a influência do manejo agroecológico na distribuição dos agregados estáveis em água e no teor de carbono orgânico dos agregados em diferentes coberturas vegetais. Foram selecionadas cinco áreas, a saber: sistema agroflorestal; cultivo de figo (Ficus carica L.); consórcio maracujá (Passiflora edulis S.)-Desmodium sp.; cultivo de feijão (Phaseolus vulgaris L.), em manejo convencional, e cultivo de milho (Zea mays L. ), em plantio direto. Em cada área, foram coletadas amostras de terra indeformadas, nas profundidades de 0 - 5 e 5 - 10 cm, e avaliada a estabilidade dos agregados e o teor de carbono orgânico nos agregados (COAGR). A maior massa de agregados encontra-se na classe de 2,00 mm, em ambas as profundidades, com exceção do cultivo de feijão. Nas duas profundidades, a classe de 2,00 mm apresentou os maiores valores de COAGR para a área do consórcio macaracujá - Desmodium sp. The objective of this study was to verify the influence of agroecological handling in the distribution of stable aggregates in water and in the levels of aggregate organic carbon under different vegetable covers. Five areas were selected: agroflorestal system; fig cultivation (Ficus carica L.); passion fruit (Passiflora edulis S.) and Desmodium sp. consortium; bean cultivation (Phaseolus vulgaris L.), under conventional system; and corn (Zea mays), in no-tillage system. In each area, undisturbed samples were collected, in 0-5 and 5-10 cm depths, and water aggregate distribution and organic carbon of aggregate (OCAGR) were quantified. The highest aggregate mass was observed in the 2.00 mm aggregate class, in both depths, except for the bean cultivation area. In both depths, the class with greater diameter showed the highest OCAGR values for the area of passion fruit - Desmodium sp. consortium.
- Subjects :
- Total organic carbon
Aggregate (composite)
agregação
business.industry
Soil organic matter
Environmental engineering
aggregation
vegetable residues
Distribution (economics)
adubação verde
plantio direto
Agronomy
no-tillage system
Environmental science
resíduos vegetais
business
Agronomy and Crop Science
Agroecology
green manuring
Subjects
Details
- Language :
- Portuguese
- Database :
- OpenAIRE
- Journal :
- Acta Scientiarum. Agronomy, Volume: 31, Issue: 3, Pages: 523-528, Published: SEP 2009
- Accession number :
- edsair.doi.dedup.....deb5be8efdf43f5455c41e5820b16da7