11 documents found, page 1 of 2
Clube dos Heróis: Atividades para o bem-estar na infância
Ferreira, S.; Caldeira, S.; Rocha, C.; Cabral, F.; Fernandes, H.; Correia, M.; Tavares, M.; Amaral, S.; Soares. S.; Ponte, S.Este artigo apresenta o Clube dos Heróis, um recurso psicopedagógico na área da promoção de competências pessoais e sociomeocionais, dirigido a profissionais, pais e outros /cuidadores de crianças dos 5 aos 10 anos. A literatura evidencia que a promoção de competências pessoais e socioemocionais reduz problemas de internalização e externalização e potencia o rendimento académico, comportamentos prossociais e at...
Effects of cattle-slurry treatment by acidification and separation on nitrogen ...
Fangueiro, D.; Pereira, J.; Bichana, A.; Surgy, S.; Cabral, F.; Coutinho, J.Cattle-slurry (liquid manure) application to soil is a common practice to provide nutrients and organic matter for crop growth but it also strongly impacts the environment. The objective of the present study was to assess the efficiency of cattle-slurry treatment by solideliquid separation and/or acidification on nitrogen dynamics and global warming potential (GWP) following application to an acidic soil. An ae...
Impact of cattle slurry treatment by separation and acidification on gaseous em...
Fangueiro, D.; Pereira, J.; Bichana, A.; Surgy, S.; Cabral, F.; Coutinho, J.Objectives: Cattle-slurry management became a priority in many livestock farms and slurry treatment is used to increase the fertilizer value of slurry and/or minimize its environmental impact. Indeed, significant emissions of ammonia (NH3) and greenhouse gases (GHG) as nitrous oxide (N2O), carbon dioxide (CO2) and methane (CH4) can occur during and after slurry application to soil. Application of acidified slur...
Maximize the plant nitrogen use efficiency of animal slurry using an efficient ...
Fangueiro, David; Surgy, Sónia; Coutinho, João; Cabral, F.; Carneiro, J.P.Maximize the plant nitrogen use efficiency of animal slurry using an efficient treatment prior soil application.
Influence of the particle size and animal slurry type on the potential of nitro...
Fangueiro, D.; Gusmão, M.; Grilo, J.; Vasconcelos, E.; Cabral, F.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 characteristics as the C:N ratio (Chad...
Assessment of CO2 emissions during acidification, storage and after incorporati...
Fangueiro, D.; Gusmão, M.; Surgy, S.; Cabral, F.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 promoted to improve slurry management...
Carbon and nitrogen mineralization of organic wastes from sugarcane distillerie...
Vasconcelos, E.; Cabral, F.; Pita, V.; Fangueiro, D.; Ribeiro, H.M.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 watercourses or when poorly managed (Hati ...
Proportion, composition and potencial N mineralisation of particle size fractio...
Fangueiro, D.; Gusmão, M.; Grilo, J.; Porfirio, G.; Vasconcelos, E.; Cabral, F.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 nitrogen (N) phosphor...
Assessment of N mineralization and leaching in soil using a new in-situ incubat...
Cabral, F.; Sousa, J.R.; Coutinho, J.Towards sustainable soil management, the application of organic residues to the soil has to be based on criteria sustained by experimental studies. Several methods for estimating the amount of N that mineralizes from landapplied organic residues can be used but laboratory incubations has been the main methodology used due to several advantages related to practical and economical aspects (Qafoku et al., 2001). H...
Use of pulp mill inorganic wastes as alternative liming materials
Cabral, F.; Ribeiro, H.M.; Hilário, L.; Machado, L.; Vasconcelos, E.A laboratory aerobic incubation study was performed during 18 weeks under controlled conditions to assess the effects of applying different doses of pulp mill inorganic wastes on the physical–chemical properties of an acid Dystric Cambissol. Three different inorganic wastes were tested – wood ash, dregs and grits, and an agriculture limestone was used as reference. Results showed that increasing the dose applie...