Embrapa Agricultura Digital (CNPTIA) https://www.alice.cnptia.embrapa.br/alice/handle/item/19 2026-07-03T07:00:07Z 2026-07-03T07:00:07Z KLINKE NETO, G. OLIVEIRA, A. H. BOLFE, E. L. BERGIER, I. GOULART, A. J. H. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187841 2026-06-28T12:37:27Z 2026-01-01T00:00:00Z

Título: Cloud-based fusion of Sentinel-1 Radar, MODIS and soil moisture data for resolution-refined evapotranspiration mapping in mountain coffee systems. Autoria: KLINKE NETO, G.; OLIVEIRA, A. H.; BOLFE, E. L.; BERGIER, I.; GOULART, A. J. H. Conteúdo: Accurate monitoring of hydrological dynamics in complex perennial landscapes is a cornerstone for tropical agricultural sustainability. Traditional energy balance models based on orbital optical data often face methodological bottlenecks due to cloud cover and the “greening myth,” where optical indices fail to capture immediate water stress due to the non-linear decoupling between stomatal closure and pigment loss. This study developed a cloud-integrated multisensor framework to estimate actual evapotranspiration (ETa) at a refined 100 m resolution in mountain coffee systems, utilizing active microwave proxies from Sentinel-1. We fused polarimetric metrics—Degree of Polarization (DoP) and Shannon Entropy (SE)—with land surface temperature and soil moisture data. Multiple Linear Regression (MLR) was compared against non-linear algorithms (Random Forest and SVR) to prioritize model parsimony and physical interpretability. The results show that MLR emerged as the most parsimonious and suitable model within this localized dataset scope (R2 = 0.872; RMSE = 2.916 mm/8-day), outperforming complex “black-box” architectures. Soil moisture emerged as the dominant environmental driver of ETa variability, while SAR-based metrics served as sensitive mechanical proxies for canopy geometric heterogeneity and macro-structural variations. Cross-correlation analysis revealed a 16-day lag, empirically indicating that biophysical water shifts temporally precede geometric canopy alterations. Operationally, this framework ensures temporal continuity under persistent cloud cover and provides high-fidelity spatial detailing for precision water management. This approach offers an auditable and scalable tool for watershed planning and climate resilience in tropical agriculture.

2026-01-01T00:00:00Z KIMPARA, J. M. ALVES, A. L. PIRES, A. ROMANI, L. A. S. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187749 2026-06-28T12:36:38Z 2026-01-01T00:00:00Z

Título: Desafios para a inovação na aquicultura 4.0 brasileira. Autoria: KIMPARA, J. M.; ALVES, A. L.; PIRES, A.; ROMANI, L. A. S. Conteúdo: A aquicultura brasileira cresce de forma consistente e tem potencial para ampliar produção e exportações com menor impacto ambiental em relação a outras atividades da produção animal, especialmente quando alavancada por soluções de automação, sensores e inteligência de dados (Aquicultura digital). Apesar desse avanço, persistem gargalos de governança, estrutura produtiva, assistência técnica e adoção tecnológica que limitam produtividade, competitividade e sustentabilidade do setor. O objetivo deste trabalho foi sistematizar, a partir de um workshop multissetorial, os principais desafios e soluções prioritárias para acelerar a Aquicultura digital no Brasil. Para isso, foi realizado o evento “Aquicultura 4.0: desafios e oportunidades”, reunindo representantes de toda a cadeia (produtores, empresas, governo, associações, startups, pesquisa e extensão)

2026-01-01T00:00:00Z CARVALHO, P. C. F. BARIONI, L. G. FREUA, M. C. BOVAL, M. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187715 2026-06-28T12:36:13Z 2013-01-01T00:00:00Z

Título: Environmental challenges of pastoral farming systems in tropical areas. Autoria: CARVALHO, P. C. F.; BARIONI, L. G.; FREUA, M. C.; BOVAL, M. Conteúdo: The need to increase food production has become urgent. Pastoral farming systems based on grasslands in the tropics are essential players in this scenario, considering the surface area and stakeholders they represent. Improving productivity from existing grasslands can be a way forward to produce food, because most of them still produce less than the potential primary and secondary production they could achieve if constraints to pasture and animal growth were surpassed using existing technologies. This potential production could be reached without increasing the surface area used. However, the technologies available to support this intensification process are generally based on an input approach, and are associated with increased use of natural resources and pollution. This classical anthropogenic effect has already been experienced in the temperate grasslands of developed countries, and has raised environmental concerns there. Pastoral farming systems in the tropics seemed to be following the same trend, but are currently being called upon to increase production without such side effects. Dealing with these new environmental drivers and unraveling the production vs. conservation dilemma requires pastoral farming to take a new process-oriented approach. Grassland science is responding to this environmental constraint, and is being asked to build innovative systems devoted to sustainable intensification, at a time when urgency contrasts with a seeming lack of creativity and innovation. Here we explore these issues, focusing on Brazilian pastoral farming trends. This case study is of worldwide interest because of its major place in the global market, and its impact on food security and natural resource conservation in Brazil and elsewhere.

2013-01-01T00:00:00Z LIMA, J. D. PEREIRA, M. R. ROZANE, D. E. SILVA, S. H. M. G. da GOMES, E. N. NOMURA, E. S. GIACHETTO, P. F. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187724 2026-06-28T12:36:14Z 2026-01-01T00:00:00Z

Título: Induced chilling injury in banana: physiological and quality responses of cultivars to natural cold front. Autoria: LIMA, J. D.; PEREIRA, M. R.; ROZANE, D. E.; SILVA, S. H. M. G. da; GOMES, E. N.; NOMURA, E. S.; GIACHETTO, P. F. Conteúdo: Banana fruits are susceptible to chilling injury (CI) under field conditions, which significantly impairs fruit quality. Cold tolerance varies among genotypes; however, only a limited number of cultivars have been identified as tolerant and are commercially cultivated. This study aimed to investigate the physiological responses and quality attributes of banana cultivars exposed to natural cold fronts during development, compared with fruits developed under summer conditions. Furthermore, it evaluated whether the B genome confers greater cold tolerance, driven by a more efficient antioxidant mechanism, thereby supporting its recommendation for cultivation in regions prone to low temperatures. Bunches were harvested in winter following five natural cold fronts, during which air temperatures fell below 12 °C (137 h). The experimental design followed a completely randomized design in a factorial arrangement. Consecutive cold fronts intensified CI symptoms up to the fourth exposure event. CI severity was highest in ‘Grande Naine’ (AAA), which exhibited lower L*, a*, and b* values at the ripe stage compared to ‘BRS Princesa’ (AAAB) and ‘Prata Catarina’ (AAB), along with greater deviations relative to summer-harvested fruits. Malondialdehyde (MDA), total phenolic content, and antioxidant enzyme activities (SOD, CAT, APX, and POD) in the peel of unripe fruits were significantly higher during winter, particularly in ‘BRS Princesa’ and ‘Prata Catarina’, compared to ‘Grande Naine’. Proline accumulation followed a similar pattern, with the highest levels observed in ‘BRS Princesa’, followed by ‘Prata Catarina’ and ‘Grande Naine’. The findings indicate that ‘BRS Princesa’ exhibits greater tolerance to cold stress and highlights of the contribution of the B genome. Phenolic content was identified as a consistent marker of seasonal variation across cultivars.

2026-01-01T00:00:00Z