Organic matter in a dystroferric Red Latossol under no-tillage
DOI:
https://doi.org/10.5433/1679-0359.2013v34n2p635Palavras-chave:
Crop rotation, Size fractions, Organic carbon, Soil nitrogen.Resumo
Soils of the Cerrado have chemical, physical, and biological limitations for agriculture, which, associated with climate factors, contribute to their impoverishment. The maintenance and accumulation of soil organic matter are considered the best option of addressing this problem and to ensure a sustainable production. The purpose of this study was to evaluate different fractions of organic matter, and carbon and nitrogen contained in these compartments of a very clayey dystroferric Red Latossol under different crop rotations and at different depths under long-term no-tillage in Dourados, state of Mato Grosso do Sul. The experiment was arranged in a randomized block design with three replications, and the treatments in a 5x4 factorial design, with five crop rotation systems (1 – vetch + oat + oilseed radish/ soybean/ radish/ maize/ vetch + oats + radish/ soybean; 2 – sunflower/ soybean/ vetch + oat + radish/ maize/ sunflower/ soybean; 3 – oat/ soybean/ sunflower/ maize/ oat/ soybean; 4 – vetch + oat/ soybean/ brachiaria/ maize/ brachiaria/ soybean; 5 – vetch/soybean/vetch/maize/vetch/soybean), in four soil layers (0-5, 5-10, 10-15, 15-20 cm). Particle size was analyzed to determine the particulate fraction of organic matter (POM), and carbon (C-POM) and nitrogen (N-POM) in it. It was concluded that the levels and stock of C-POM, and nitrogen contents in the soil are not influenced by the different crop rotation systems. Crop rotation 4 increased the levels and stock of total organic carbon (TOC), carbon associated with soil minerals (C-MOM) and the total C/N ratio and total C/N ratio associated with soil minerals. The highest levels of TOC, C-POM, C-MOM, total nitrogen, N-POM and nitrogen associated with soil minerals (N-MOM) were found in the 0-5cm layer.
Downloads
Downloads
Publicado
Como Citar
Edição
Seção
Licença
Copyright (c) 2013 Semina: Ciências Agrárias
Este trabalho está licenciado sob uma licença Creative Commons Attribution-NonCommercial 4.0 International License.
Semina: Ciências Agrárias adota para suas publicações a licença CC-BY-NC, sendo os direitos autorais do autor, em casos de republicação recomendamos aos autores a indicação de primeira publicação nesta revista.
Esta licença permite copiar e redistribuir o material em qualquer meio ou formato, remixar, transformar e desenvolver o material, desde que não seja para fins comerciais. E deve-se atribuir o devido crédito ao criador.
As opiniões emitidas pelos autores dos artigos são de sua exclusiva responsabilidade.
A revista se reserva o direito de efetuar, nos originais, alterações de ordem normativa, ortográfica e gramatical, com vistas a manter o padrão culto da língua e a credibilidade do veículo. Respeitará, no entanto, o estilo de escrever dos autores. Alterações, correções ou sugestões de ordem conceitual serão encaminhadas aos autores, quando necessário.
