Soil organic matter fractions as a short-term indicator of carbon turnover under agricultural systems.

Integrated crop-livestock-forest (ICLF) systems has been considered as an important strategy to enhance C sequestration. However, changes in soil C due to agricultural management practices, in general, are observed in long-term experiments. Our objective was to investigate short-term impacts on soil organic matter under different management systems in the Cerrado/Amazonia region. Treatments corresponded to ICLF, No-tillage, Pasture and Eucalyptus plantation. Soil was sampled in 2014, in the 0-5, 5-10 and 10-30 cm layers for quantification of light- and heavy-fraction C stocks as well as their C isotopic composition (DELTA 13C). After three years established, all evaluated treatments showed similar values of light- and heavy-fraction C stocks to those observed under Native Forest in the 0-30 cm layer. Under Pasture and ILCF treatments, we observed that most of C of the light-fraction was substituted by pasturederived C in the uppermost soil layer (0-5 cm). Despite no differences in heavyand light-fraction C, the application of 13C stable isotope technique seems to be an important tool to evaluate short-term C turnover under agricultural systems.

Bibliographic Details

Main Authors:	MATOS, E. da S., CONCEIÇÃO, M. C. G. da, BIDONE, E. G., RODRIGUES, R. de A. R., CORDEIRO, R. C.
Other Authors:	EDUARDO DA SILVA MATOS, CPAMT; MARCELA C. G. DA CONCEIÇÃO, UFF; EDISON G. BIDONE, UFF; RENATO DE ARAGAO RIBEIRO RODRIGUES, CNPS; RENATO C. CORDEIRO, UFF.
Format:	Parte de livro biblioteca
Language:	English eng
Published:	2018-01-15
Subjects:	Agricultura conservacionista, Integração lavoura-pecuária-floresta, Carbono do solo,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1085351
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