17 documents found, page 1 of 2
Definição e validação de zonas de gestão (ZG) na vinha: Estudo de caso
Serrano, João; Paixão, L.; Marques da Silva, José; Moral, F.No contexto atual, de subida dos custos de produção, é essencial otimizar a gestão dos recursos disponíveis, o que pressupõe a incorporação de tecnologias que melhorem o conhecimento sobre as variáveis envolvidas no processo produtivo. Este estudo teve por objetivo demonstrar os benefícios de definir e validar zonas de gestão (ZG) numa vinha. Para o efeito foram realizados dois levantamentos expeditos da parcel...
Sensing and Mapping the Effects of Cow Trampling on Soil Compaction of the Mont...
Serrano, João; Marques, J.; Shahidian, S.; Carreira, E.; Marques da Silva, J.; Paixão, L.; Paniagua, L.L.; Moral, F.; Ferraz de Oliveira, I.The economic and environmental sustainability of extensive livestock production systems requires the optimisation of soil management, pasture production and animal grazing. Soil compaction is generally viewed as an indicator of soil degradation processes and a determinant factor in crop productivity. In the Montado silvopastoral ecosystem, characteristic of the Iberian Peninsula, animal trampling is mentioned a...
Vineyard management zones: A case study based on soil apparent electrical condu...
Serrano, João; Mau, Vasco; Rodrigues, Rodrigo; Paixão, L.; Shahidian, Shakib; Marques da Silva, José; Paniagua, Luís; Moral, F.In the current context of increasing costs of production factors, it is essential to optimize the management of available resources, seeking to incorporate technologies that improve knowledge of the variables involved in the agronomic production process. In this study, carried out in a 3.3 ha vineyard located near Évora, in the South of Portugal, a contact sensor (“Veris 2000 XA”) was used to map soil apparent ...
Management zones in pastures based on soil apparent electrical conductivity and...
Serrano, João; Shahidian, S.; Paixão, L.; Marques da Silva, J.; Moral, F.The intensification of the Montado mixed ecosystem (agro–silvo–pastoral) is a current endeavor in the context of promoting the sustainability of extensive livestock production in the Mediterranean region. Increased pasture productivity and extensive animal production involves the use of technologies to monitor spatial variability and to implement differentiated management of pasture grazing, fertilization or so...
A Technological Approach to Support Extensive Livestock Management in the Portu...
Serrano, João; Roma, Luís; Shahidian, S.; Belo, Anabela; Carreira, E.; L. Paniagua, L.; Moral, F.; Paixão, L.; Marques da Silva, J.Extensive livestock production systems based on improved pastures under Montado of Holm oaks represent an approach in line with the challenges of sustainability and biodiversity. The increasing incorporation of technologies in the monitoring of this ecosystem allows for a better knowledge of the spatial and temporal variability and, consequently, a more economically profitable management. In this study, between...
Spatiotemporal Patterns of Pasture Quality Based on NDVI Time-Series in Mediter...
Serrano, João; Shahidian, S.; Paixão, L.; Marques da Silva, J.; Morais, T.; Teixeira, R.; Domingos, T.The evolution of dryland pasture quality is closely related to the seasonal and interannual variability characteristic of the Mediterranean climate. This variability introduces great unpredictability in the dynamic management of animal grazing. The aim of this study is to evaluate the potential of two complementary tools (satellite images, Sentinel-2 and proximal optical sensor, OptRx) for the calculation of th...
Esterase production by Aureobasidium pullulans URM 7059 in stirred tank and air...
Meneses, D.; Paixão, L.; Fonteles, Thatyane V.; Gudiña, Eduardo José; Rodrigues, L. R.; Fernandes, Fabiano A. N.; Rodrigues, SueliAureobasidium pullulans URM 7059 produced esterase using residual glycerol from biodiesel as the sole carbon source. The culture medium containing residual glycerol (0.1% v/v), (NH4)2SO4 (4g/L), and yeast extract (8g/L) resulted in the highest esterase production using shake-flasks. The enzyme exhibited a molar mass of 50kDa and was stable at neutral pH and temperatures below 30°C. The cations Cu2+ and Al3+ did...
Evaluation of Near Infrared Spectroscopy (NIRS) for Estimating Soil Organic Mat...
Serrano, João; Shahidian, S.; Marques da Silva, J.; Paixão, L.; Carvalho, M.; Moral, Francisco J.; Nogales-Bueno, J.; Teixeira, R.; Jongen, M.The Montado is an agro-silvo-pastoral ecosystem characteristic of the Mediterranean region. Pasture productivity and, consequently, the possibilities for intensifying livestock production depend on soil fertility. Soil organic matter (SOM) and phosphorus (P2O5) are two indicators of the evolution of soil fertility in this ecosystem. However, their conventional analytical determination by reference laboratory me...
Mapping Management Zones Based on Soil Apparent Electrical Conductivity and Rem...
Serrano, João; Shahidian, S.; Marques da Silva, J.; Paixão, L.; Moral, F.; Carmona-Cabezas, R.; Garcia, S.; Palha, J.; Noéme, J.Climate change, especially the trend towards global warming, will significantly affect the global hydrological cycle, leading to a general reduction of the water available for agriculture. In this scenario, it is essential that research should focus on the development of ‘water saving’ techniques and technologies. This work summarizes the methodology followed in a project for large scale implementation of varia...
Estudo da enxaqueca em idade pediátrica nos cuidados de saúde primários da regi...
Lopes Freitas, Elsa Rafaela; Mina, M.; Madanelo, I.; Silva, B.; Silva, C.; Cebola, J.; Ribeiro, M.; Tomás, L.; FIGUEIREDO, INÊS; Amaral, L.; Paixão, L.Introdução: A enxaqueca é uma cefaleia primária comum, que pode ter início em idade pediátrica. Não existem dados concretos nos cuidados de saúde primários (CSP) em Portugal. Foi objetivo deste estudo caracterizar uma população pediátrica com diagnóstico de enxaqueca em seguimento nos CSP da região Centro de Portugal, abordando aspetos demográficos, epidemiológicos e clínicos. Métodos: No primeiro trimestre de ...