6 documents found, page 1 of 1
Efeitos da utilização de chorume de suíno bruto ou tratado na substituição da a...
Alvarenga, Paula; Araújo, Miguel; Prado, Joana; Ribeiro, Henrique; Fangueiro, DavidA valorização agrícola de efluentes pecuários é considerada prioritária nas estratégias preconizadas na legislação (Portaria nº 79/2022). Porém, é importante evidenciar os méritos dessa estratégia em termos agrícolas, i.e., que a fertilização com materiais orgânicos pode ser feita sem perdas de produtividade e sem riscos para o solo, mas, também, criando soluções para reduzir os impactos ambientais (perdas de n...
Assessment of the agronomic value of manure-based fertilizers
Prado, Joana; Fangueiro, David; Alvarenga, Paula; Ribeiro, HenriqueProducing manure-based fertilizers (MBFs) with specific nutrient ratios is a solution to overpassing the imbalance of nitrogen and phosphorus in manures, and a way to recycle manure’s nutrients, promoting sustainable agricultural practices. Several MBFs with different tailored N:P ratios (0.5:1, 1:1 and 2:1) were produced to determine their agronomic value in a pot experiment with oat (0.5:1 ratio: cattle manur...
Nutrient potential leachability in a sandy soil amended with manure-based ferti...
Prado, Joana; Alvarenga, Paula; Ribeiro, Henrique; Fangueiro, DavidThe application of manure-based fertilisers (MBFs) is considered an important practice for achieving agricultural sustainability. However, the potential losses of nutrients to the environment need to be thoroughly evaluated. This study aimed to assess nutrients’ potential leachability from a sandy soil, fertilised with MBFs produced by mixing manure from one single animal species with N- or P-mineral fertiliser...
Projecto Nutri2cycle: soluções para a circularidade de nutrientes e carbono na ...
Alvarenga, Paula; Prado, Joana; Esteves, Catarina; Silva, Arejacy; Fangueiro, DavidO projeto Nutri2Cycle (Horizonte 2020), tem como principal objetivo desenvolver os mecanismos que permitam uma circularidade mais eficiente de carbono e nutrientes (principalmente N e P), entre o setor agrícola e a produção animal, levando ao desenvolvimento de uma agricultura mais sustentável nos diferentes sistemas agrícolas Europeus. Neste sentido, é vital o contributo tecnológico do processamento, que permi...
A step towards the production of manure-based fertilizers: Disclosing the effec...
Prado, Joana; Ribeiro, Henrique; Alvarenga, Paula; Fangueiro, DavidIn a context of climate change and circular economy, it is fundamental to produce animal manure-based fertilizers attractive to farmers who are reluctant to use heterogeneous materials, poorly characterized and with unbalanced nutrient contents, namely N:P ratios different from plant requirements. Hence, the aim of the present study was to assess the potential of different treated and non-treated animal manures...
Bio-acidification and enhanced crusting as an alternative to sulphuric acid add...
Prado, Joana; Chieppe, João; Raymundo, Anabela; Fangueiro, DavidSeveral solutions are today proposed to farmers to minimize ammonia (NH3) emissions during storage. In the present study, special attention was given to slurry acidification and slurry crust enhancement and our objective was to assess the effect of slurry bio-acidification using sugar and cheese whey as an alternative to sulphuric acid, and the potential of rice bran as crust enhancer on NH3 and greenhouse gase...