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Efeitos agronómicos resultantes da utilização de diferentes técnicas de aplicaç...
Carneiro, J.P.; Soares, D.; Monteiro, J.; Surgy, S.; Pereira, J.; Coutinho, J.; Trindade, H.; Fangueiro, D.A aplicação de chorume ao solo por injeção, ou após tratamento através da separação mecânica de sólidos ou da acidificação, são práticas consideradas como suscetíveis de reduzirem emissões de amoníaco (NH3). Com o objetivo de avaliar, em condições mediterrânicas, o efeito destas técnicas de aplicação de chorume na produção de silagem de milho e na eficiência da utilização pelas plantas do azoto (N) aplicado, fo...
Proportion, composition and potencial N mineralisation of particle size fractio...
Fangueiro, D.; Gusmão, M.; Grilo, J.; Porfirio, G.; Vasconcelos, E.; Cabral, F.Research Paper ; Mechanical slurry separation is a useful technology for slurry management on farms. The characteristics of the fractions obtained depend on the separation efficiency and on the characteristics of the original slurry. In the present work, three types of slurry e pig, cow and duck e were separated into 4 particle size fractions. The proportion, composition in terms of carbon and nutrients as nit...
Carbon and nitrogen mineralization of organic wastes from sugarcane distillerie...
Vasconcelos, E.; Cabral, F.; Pita, V.; Fangueiro, D.; Ribeiro, H.M.RAMIRAN International Conference ; In Madeira Island (Portugal) significant amounts of wastes are generated in sugarcane distilleries, namely vinasse (the remaining fermented must after distillation) and yeast waste (the yeast surplus produced during the alcoholic fermentation). These wastes have high organic loads and low pH, leading to serious environmental problems when released directly into natural waterc...
Assessment of CO2 emissions during acidification, storage and after incorporati...
Fangueiro, D.; Gusmão, M.; Surgy, S.; Cabral, F.RAMIRAN International Conference ; Large amounts of pig slurry are produced each year in Portugal leading to environmental problems such as water and air pollution. Previous studies have reported that livestock production is the main source of anthropogenic ammonia (NH3) emissions in Europe (Kai et al., 2008) and an important source of greenhouse gases (Weiske and Petersen, 2006). Effluent treatment has been p...
Influence of the particle size and animal slurry type on the potential of nitro...
Fangueiro, D.; Gusmão, M.; Grilo, J.; Vasconcelos, E.; Cabral, F.RAMIRAN International Conference ; Animal manures are rich in organic matter and nutrients, namely nitrogen (N) and, consequently, widely applied to soil as organic fertilizers. However, a large part of the nitrogen contained in animal manures is in the organic form and so not directly available for plants. Indeed, organic N has to be mineralized prior to plant uptake (Rees and Castle, 2002). Several manure ch...
Effect of dairy effluents pre-treatment on N2O emissions and N-organic degradat...
Fangueiro, D.; Pereira, J.; Coutinho, J.; Moreira, N.; Trindade, H.Nitrous oxide (N2O) is a potent greenhouse gas that plays a key role in climatic forcing contributing to the greenhouse effect by about 4 %, and also contributes to stratospheric ozone depletion. Cattle slurries are commonly applied to agricultural soils, inducing an increase of soil nitrous oxide emissions. Therefore, many procedures were developed for slurry pre-treatment in order to improve soil slurry a...
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