Data/hora: 21/06/2024 10:47:43

Biblioteca(s): | Embrapa Arroz e Feijão; Embrapa Meio-Norte.
Data corrente: | 02/06/2022
Data da última atualização: | 09/01/2023
Autoria: | OLIVEIRA, J. M.; GOLLANY, H. T.; POLUMSKY, R. W.; MADARI, B. E.; LEITE, L. F. C.; MACHADO, P. L. O. A.; CARVALHO, M. T. M.
Afiliação: | JANAINA 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.
Título: | Predicting soil organic carbon dynamics of integrated crop-livestock system in Brazil using the CQESTR model.
Ano de publicação: | 2022
Fonte/Imprenta: | Frontiers in Environmental Science, v. 10, article 826786, Mar. 2022.
ISSN: | 2296-665X
DOI: | https://doi.org/10.3389/fenvs.2022.826786
Idioma: | Inglês
Conteúdo: | Land 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.
Palavras-Chave: | Integrated crop-livestock.
Thesagro: | Carbono; Cerrado; Solo Orgânico.
Thesaurus Nal: | Biomass production; Carbon sequestration; Cerrado soils; Land degradation; Soil organic carbon.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1143671/1/fes-2022.pdf
Registro original: | Embrapa Arroz e Feijão (CNPAF)

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CNPAF - (36442-1) - UPC - AP - DD - 2022 -  - 2022 - DIS
CPAMN - (33375-1) - UPC - AP - DD -  -  -  - DIS