A carregar...
Publicação
Avaliação do impacto ambiental de novas estratégias de gestão de chorumes para minimização de perdas de nutrientes e aumento da produção
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 1.76 MB | Adobe PDF |
Orientador(es)
Resumo(s)
The increasing of population along with the decrease of agricultural area led to the intensification of agriculture and livestock production in order to continue to respond to the current food requirements. Consequently there has been an increase of animal waste that might be a source of environmental pollution.
This study has as main objective to evaluate strategies for land application of slurry in relation to its environmental impact and the agronomic value of slurry. The following treatments were considered: acidification, solid-liquid separation and the impact of slurry incorporation shortly after its surface application.
An assay in pots has been performed during which emissions of ammonia (NH3) and greenhouse gases (GHG) were monitored and also the concentration of nutrients in the soil solution. At the end of the assay, the production of fodder oats was evaluated as well as the export of nutrients associated.
It has been concluded that the best combination of treatments is the surface application of acidified slurry without incorporation. As the method currently recommended is the injection of slurry, that has several limitations, it may be relevant to review the legislation concerning land application of livestock effluents, if future assays to full scale validate our results.
Descrição
Mestrado em Engenharia do Ambiente - Gestão Ambiental - Instituto Superior de Agronomia
Palavras-chave
cattle slurry injection acidification solid-liquid separation NH3 and GHG emissions soil solution
Contexto Educativo
Citação
Macedo, S.A.N.A. - Avaliação do impacto ambiental de novas estratégias de gestão de chorumes para minimização de perdas de nutrientes e aumento da produção. Lisboa: ISA, 2013, 88 p.