https://www.alice.cnptia.embrapa.br/alice/handle/item/24137 Embrapa Maranhão (CPACP) 2026-07-18T22:15:34Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188357 Título: Carbon footprint of beef cattle production in integrated systems of the Brazilian Cerrado. Autoria: FREITAS, A. C. R. de; ALMEIDA, R. G. de; MACEDO, M. C. M.; GOMES, R. da C.; BUNGENSTAB, D. J.; LAURA, V. A.; OLIVEIRA, C. C. de; GOMES, E. G.; PORFIRIO-DA-SILVA, V.; ALVES, B. J. R.; MADARI, B. E. Conteúdo: Prediction of soil organic carbon (SOC) stocks, tree carbon stocks, enteric emissions, and beef production is essential for evaluating low-carbon livestock systems. However, there is still limited information regarding the use of mechanistic models capable of simultaneously integrating these components under tropical integrated production systems. This study evaluated the performance of the Manure-DeNitrification-DeComposition (Manure-DNDC) model to simulate SOC stocks and estimate the emission intensity of beef production in integrated crop-livestock-forest (ICLF) systems of the Brazilian Cerrado. Methods: Experimental data collected from 2008 to 2016 at the Embrapa Beef Cattle experimental site in Campo Grande, Mato Grosso do Sul, Brazil, were used to evaluate native vegetation (NV), integrated crop-livestock (ICL), and integrated crop-livestock-forest systems (ICLF14 and ICLF22). The Manure-DNDC model was applied to simulate SOC dynamics, beef production, and enteric emissions, and model estimates were compared with measured field data. Results: The model showed good agreement between simulated and measured SOC stocks, beef production, and enteric emissions across the evaluated systems. Annual additional SOC stocks were estimated at -0.025 Mg CO2e ha-¹ year-¹ for NV, +1.06 Mg CO2e ha−¹ year-¹ for ICL, +0.83 Mg CO2e ha-¹ year-¹ for ICLF22, and +0.30 Mg CO2e ha-¹ year-¹ for ICLF14. Emission intensity was estimated at 7.7 kg CO2e kg-¹ live weight gain (LWG) for ICL, whereas negative net values were observed for ICLF22 (-31.5 kg CO22 kg-¹ LWG) and ICLF14 (-69.5 kg CO2e kg-¹ LWG).Discussion: The Manure-DNDC model satisfactorily represented greenhouse gas (GHG) emissions and carbon sequestration under Brazilian Cerrado conditions. The findings highlight the potential of ICLF systems to mitigate GHG emissions and reduce the carbon footprint of beef production. 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188355 Título: Frações de carbono e atributos físicos do solo em função dos níveis de adubação avaliados em sistema agrossilvipastoril no Maranhão. Autoria: APOLINÁRIO, V. X. O.; SANTOS, V. H. L. S.; PESSOA, D. V.; COSTA, J. B.; MUNIZ, L. C.; FIGUEIREDO, T. L.; CASTRO, J. B. S. S. Conteúdo: Os sistemas agrossilvipastoris representam uma estratégia fundamental para a consolidação de uma produção agrícola mais sustentável, especialmente diante dos impactos acumulados por décadas de práticas intensivas e degradantes ao meio ambiente. Ao integrarem componentes agrícolas, florestais e pecuários em uma mesma área, esses sistemas promovem maior equilíbrio ecológico e uso mais eficiente dos recursos naturais. 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1186742 Título: Integrating deficit irrigation and bacterial inoculation to mitigate water stress and enhance maize productivity in semiarid regions. Autoria: NOGUEIRA, D. B.; SILVA, J. L. P. da; GIROLDO, A. B.; SILVA, E. F. F. e; SILVA, G. F. da; SOUSA, G. G. de; ARRUDA, R. da S.; SOUSA, K. C. de; PUTTI, F. F.; SILVA, A. O. da Conteúdo: Water scarcity is one of the main constraints on maize production in semiarid regions, making it essential to adopt management strategies that reconcile water savings, crop resilience, and economic viability. This study evaluated the effects of deficit irrigation strategies integrated with the use of bioinputs on physiological, productive, and economic parameters of maize grown under field conditions in the Brazilian semiarid region over two growing seasons (2023 and 2024). The experiment was conducted using a randomized complete block design with a split-plot arrangement. Irrigation strategies comprised full irrigation (FI; 100% of crop water requirements), continuous deficit irrigation (RD50%; 50% throughout the crop cycle), and stage-specific controlled deficit irrigation (50%) imposed during the vegetative (CDV50%), flowering/grain formation (CDF50%), and grain-filling (CDG50%) stages, while seed treatments involved inoculation with Bacillus aryabhattai, coinoculation with B. aryabhattai + Azospirillum brasilense, and control treatments. Physiological variables, yield components, water use efficiency, the crop sensitivity coefficient to water deficit (Ky), and economic indicators were assessed. Controlled deficits irrigation, particularly under CDV50%, maintained grain yield comparable to FI (6465.80 kg ha−1, in second growing season), whereas RD50% reduced yield in 26%. Inoculation treatments enhanced gas exchange, carboxylation efficiency, and water use efficiency, resulting in higher agricultural income under specific production systems. The CDV50% strategy combined with coinoculation showed the greatest potential as a sustainable approach for maize production in semiarid environments and reduced the water use by up to 18.9%. 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1185182 Título: Características quantitativas da carcaça de ovinos confinados alimentados com torta de babaçu. Autoria: MENDES, F. I. P. P.; CUTRIM JUNIOR, J. A. A.; COSTA, J. B.; MOURA, J. N. B.; CAVALCANTE, P. D. R.; COÊLHO, N. C. O. Conteúdo: O objetivo deste estudo foi avaliar as características quantitativas da carcaça de ovinos confinados alimentados com dietas contendo diferentes proporções de torta de babaçu. Os tratamentos consistiram em níveis de inclusão de tora de babaçu na dieta, sendo estes 0%,0%, 6%, 12% e 18%. 2025-01-01T00:00:00Z