1. Soil Organic Matter and Aggregate Stability in Soybean, Maize and Urochloa Production Systems in a Very Clayey Soil of the Brazilian Savanna
- Author
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Juslei Figueiredo da Silva, Miguel Marques Gontijo Neto, Gustavo Ferreira da Silva, Emerson Borghi, Juliano Carlos Calonego, JUSLEI FIGUEIREDO DA SILVA, Universidade Estadual Paulista, MIGUEL MARQUES GONTIJO NETO, CNPMS, GUSTAVO FERREIRA DA SILVA, Universidade Estadual Paulista, EMERSON BORGHI, CNPMS, and JULIANO CARLOS CALONEGO, Universidade Estadual Paulista.
- Subjects
typic haplorthox ,soil organic carbon ,no-tillage system ,Glycine max ,Zea mays ,Urochloa brizantha ,Matéria Orgânica ,Gramínea Forrageira ,Milho ,Soja ,Carbono ,Sistema de Produção ,Solo Argiloso ,Agronomy and Crop Science ,Plantio Direto ,Capim Urochloa - Abstract
Forage grasses cultivation in production system with soybean and maize is an alternative to improve tropical weathered soils quality in Brazil. The aim of the study was to evaluate the effects in the production systems involving cultivation of Urochloa brizantha cv. Piatã, in monoculture or in succession with soybean and maize crops, on organic matter and structuring of soil in Brazilian savanna. The experiment was implemented in the 2010/2011 season. The treatments consisted of nine production systems and a native forest (savanna) as a reference area. In March 2017, soil sampling was carried out for C and N analysis, physical and chemical fractionation of SOM and aggregate stability. Production systems influenced total organic carbon (TOC) and aggregate stability, mainly in the surface layers, leading to changes in SOM quality. TOC was 31% lower in monoculture soybean production system, when compared to native savanna area, in the 0.00?0.20 m layer. The agricultural production systems influence organic matter quality and soil aggregates stability. For the Brazilian savanna conditions, grain cultivation systems under no-tillage that integrate Urochloa brizantha cv. Piatã contribute to the soil quality improvement. Soybean monoculture generally provides worse soil quality indices compared to other agricultural production systems. Made available in DSpace on 2022-07-13T13:19:36Z (GMT). No. of bitstreams: 1 Soil-organic-matter-and-aggregate-stability.pdf: 893257 bytes, checksum: de19f838d04dfb26ebf3d86448e0cef5 (MD5) Previous issue date: 2022
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- 2022
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