15 documents found, page 1 of 2
Avaliação do potencial fertilizante de compostados orgânicos obtidos a partir d...
Rodrigues, Edite; Perdigão, Adelaide; Oliveira, Verónica; Miguens, Maria Filomena; Pato, Rosinda Leonor; Arrobas, Margarida; Rodrigues, M.A.A incorporação de compostos orgânicos pode alterar significativamente as propriedades do solo, a dinâmica dos nutrientes e a produtividade da cultura, melhorando desta forma a funcionalidade dos solos. O jacinto-de-água (Eichhornia crassipes) é uma planta invasora cujo controlo leva à acumulação de muita biomassa rica em nutrientes, que poderá ser valorizada na produção de compostados. Este trabalho tem como ob...
Influence of Different Agro-Food Waste on Ammonia and Greenhouse Gas Emissions ...
Pereira, José; Costa, Telma; Figueiredo, Vítor; Marques, Francisco; Perdigão, Adelaide; Brás, Isabel; Ferreira Silva, Maria ElisabeteComposting is one of the best organic waste management techniques, with zero waste; however, it generates environmental impacts. The objective of this study was to evaluate the emission of NH3, N2O, CO2, and CH4 from the composting of olive, elderberry, and grape agro-food waste. The experiment was carried out using reactors receiving straw as control and three treatments receiving mixtures of straw and olive, ...
Mitigating Ammonia and Greenhouse Gas Emissions from Stored Pig Slurry Using Ch...
Pereira, José L.S.; Perdigão, Adelaide; Marques, Francisco; Ferreira Wessel, Dulcineia; Trindade, Henrique; Fangueiro, DavidSlurry storage is a significant source of NH3 and greenhouse gas (GHG) emissions. The aim of this laboratory study was to assess the effects of different chemical additives and biochars on the emissions of NH3, N2O, CO2, and CH4 during the short-term storage of pig slurry. The experiment was performed using Kilner jars filled with raw slurry as control and six treatment additives (5% w/w): acidified slurry, alk...
Assessment of Mineralized Nitrogen During Maize Growth Succeeding Different Win...
Perdigão, Adelaide; Pereira, José L.S.; Moreira, Nuno; Trindade, Henrique; Coutinho, JoãoBackground: Understanding soil nitrogen (N) dynamics is essential to find alternative N sources and improve N use efficiency in agriculture. Objective: The aim of this study was to assess N mineralization rates from residues of winter cover crops, during maize crop season, under Mediterranean conditions. Methods: A field experiment was carried out from May to September in central Portugal, with four replication...
Evaluation of a Tomato Waste Biofilter for the Retention of Gaseous Losses from...
Pereira, José L.S.; Perdigão, Adelaide; Fangueiro, DavidThe use of pig slurry as organic fertilizer in intensive horticulture could be possible after hygienization to avoid contamination of products. This research aimed to evaluate a mixture of a tomato waste and rice husk as biofilter media to reduce NH3, N2O, CO2, and CH4 losses from a simple and low-cost solution for slurry hygienization by pH modification. The experiment was made in a system of laboratory scale ...
Effects of the Addition of Different Additives before Mechanical Separation of ...
Pereira, José L.S.; Perdigão, Adelaide; Tavares, Ana; Silva, Maria E. F.; Brás, Isabel; Ferreira Wessel, DulcineiaThe treatment of animal slurry is used to improve management on a farm scale. The aim of this laboratory study was to assess the effects of the addition of the additives biochar, alum and clinoptilolite before the mechanical separation of whole pig slurry (WS) on the characteristics and emission of NH3 , N2O, CO2 and CH4 from solid (SF) and liquid fractions (LF). The additives were mixed with WS (5% w/w), follo...
Effect of Different Tannery Sludge Composts on the Production of Ryegrass: A Po...
Perdigão, Adelaide; Marques, Francisco; Pereira, José L.S.Background: Tannery industry produces high amounts of nutrient rich sludges that can be used as organic fertilizers. Objective: The aim of this study was to evaluate the fertilizing potential of composted tannery sludge. Methods: A pot experiment was carried out with ryegrass (Lolium perenne L.) to test two different composts: 2.0 kg dry matter (DM) tannery fatty sludge + 1.5 kg DM sheep manure + 1.5 kg DM whea...
Evaluation of a Tomato Waste Biofilter for the Retention of Gaseous Losses from...
Pereira, José L.S.; Perdigão, Adelaide; Fangueiro, DavidThe use of pig slurry as organic fertilizer in intensive horticulture could be possible after hygienization to avoid contamination of products. This research aimed to evaluate a mixture of a tomato waste and rice husk as biofilter media to reduce NH3, N2O, CO2, and CH4 losses from a simple and low-cost solution for slurry hygienization by pH modification. The experiment was made in a system of laboratory scale ...
Mitigating ammonia and greenhouse gas emissions from stored pig slurry using ch...
Pereira, José L. S.; Perdigão, Adelaide; Marques, Francisco; Wessel, Dulcineia F.; Trindade, Henrique; Fangueiro, David: Slurry storage is a significant source of NH3 and greenhouse gas (GHG) emissions. The aim of this laboratory study was to assess the effects of different chemical additives and biochars on the emissions of NH3 , N2O, CO2 , and CH4 during the short-term storage of pig slurry. The experiment was performed using Kilner jars filled with raw slurry as control and six treatment additives (5% w/w): acidified slurry,...
Effects of Biochar in Soil and Water Remediation: A Review
Perdigão, Adelaide; Pereira, José L.S.In the last decades increased global environmental concerns to water and soils pollution. The main concerns are related to the contamination of the ecosystem, food security, and human health since many of the contaminants present in soil and water (residues of pesticides and antibiotics, genes of resistance to antibiotics, and heavy metals) are absorbed by plants and enter the food chain. Remediation of the con...