Predicting soil organic carbon dynamics of integrated crop-livestock system in Brazil using the CQESTR model.

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dc.contributorJANAINA M. OLIVEIRA, pós-graduação UFG; HERO T. GOLLANY, USDA; ROBERT WAYNE POLUMSKY, USDA; BEATA EMOKE MADARI, CNPAF; LUIZ FERNANDO CARVALHO LEITE, CPAMN; PEDRO LUIZ OLIVEIRA DE A MACHADO, CNPAF; MARCIA THAIS DE MELO CARVALHO, CNPAF.
dc.creatorOLIVEIRA, J. M.
dc.creatorGOLLANY, H. T.
dc.creatorPOLUMSKY, R. W.
dc.creatorMADARI, B. E.
dc.creatorLEITE, L. F. C.
dc.creatorMACHADO, P. L. O. A.
dc.creatorCARVALHO, M. T. M.
dc.date2022-06-02T17:19:25Z
dc.date2022-06-02T17:19:25Z
dc.date2022-06-02
dc.date2022
dc.date.accessioned2026-07-01T00:07:20Z
dc.descriptionLand degradation and reduction in productivity have resulted in losses of soil organic carbon (SOC) in agricultural areas in Brazil. Our objectives were to 1) evaluate the predictive performance of CQESTR model for a tropical savannah; and 2) examine the effect of integrated management systems, including Integrated Crop-Livestock System (ICLS) scenarios on SOC stocks. Two long-term paddocks, under similar edaphic and climate conditions were used in this study. In Paddock 4 (P4) the rotation was corn (Zea mays L.) and 3.5/4.5 years pasture (Urochloa ruziziensis), while rotations in Paddock 5 (P5) included 2.5 years of soybean (Glycine max L.), dryland rice (Oryza sativa L.), and corn followed by 2.5/3.5 years pasture (U. brizantha). Measured and CQESTR simulated values were significantly (0.0001) correlated (r = 0.94) with a mean square deviation (MSD) of 7.55, indicating that the model captured spatial-temporal dynamics of SOC. Predicted SOC increased by 18.0 and 12.04 Mg ha-1 at the rate of 0.90 and 0.60 Mg ha-1 year-1 under current ICLS management for P4 and P5, respectively, by 2039. ICLS increased soil C sequestration compared to simple grain cropping systems under both NT and CT due to high biomass input into the production system.
dc.identifierFrontiers in Environmental Science, v. 10, article 826786, Mar. 2022.
dc.identifier2296-665X
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1143671
dc.identifierhttps://doi.org/10.3389/fenvs.2022.826786
dc.identifier.urihttp://hdl.handle.net/123456789/397819
dc.languageeng
dc.rightsopenAccess
dc.subjectIntegrated crop-livestock
dc.subjectSolo Orgânico
dc.subjectCarbono
dc.subjectCerrado
dc.subjectLand degradation
dc.subjectSoil organic carbon
dc.subjectCerrado soils
dc.subjectCarbon sequestration
dc.subjectBiomass production
dc.titlePredicting soil organic carbon dynamics of integrated crop-livestock system in Brazil using the CQESTR model.
dc.typeArtigo de periódico

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