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Abstract(s)
Os lameiros são a base da atividade pecuária na região de Trás-os-Montes através de pastoreio e corte de feno. Este estudo teve como objetivo avaliar o efeito da fertilização de um lameiro na produção de matéria seca, no conteúdo em nutrientes na biomassa e na fertilidade do solo. O ensaio foi instalado na Primavera de 2013, tendo recebido anualmente o equivalente a 80 kg de azoto, 100 kg de potássio (K2O), 150 kg de fósforo (P2O5) e 3 kg de boro até à primavera de 2020. A aplicação de azoto aumentou significativamente a produção de matéria seca relativamente a qualquer um dos outros tratamentos. A testemunha não fertilizada originou valores significativamente mais baixos que os tratamentos que receberam fósforo, potássio ou boro. De uma maneira geral, a biomassa de um dado tratamento mostrou-se mais rica no nutriente aplicado nesse tratamento. A aplicação de fósforo, potássio e boro aumentaram a concentração desses nutrientes no solo. A matéria orgânica e o conteúdo em nutrientes no solo foram mais elevados na camada superficial, enquanto o pH se apresentou alcalino na camada superficial.
Meadows are the basis of livestock production in the region of Trás-os-Montes through grazing and cut for hay. This study aimed to evaluate the effect of the fertilization of a meadow on the production of dry matter, on the nutrient content of biomass and on soil fertility. The experiment was installed in spring 2013, having received annually the equivalent of 80 kg of nitrogen, 100 kg of potassium (K2O), 150 kg of phosphorus (P2O5) and 3 kg of boron until the spring of 2020. The application of nitrogen significantly increased dry matter yield compared to any of the other treatments. The unfertilized treatment gave significantly lower values than the other that received phosphorus, potassium or boron. In general, the biomass of a given treatment proved to be richer in the nutrient applied in the corresponding treatment. The application of phosphorus, potassium and boron increased the concentration of these nutrients in the soil. Organic matter and nutrient content in the soil were higher in the top layer, while soil pH was less alkaline in the surface layer.
Meadows are the basis of livestock production in the region of Trás-os-Montes through grazing and cut for hay. This study aimed to evaluate the effect of the fertilization of a meadow on the production of dry matter, on the nutrient content of biomass and on soil fertility. The experiment was installed in spring 2013, having received annually the equivalent of 80 kg of nitrogen, 100 kg of potassium (K2O), 150 kg of phosphorus (P2O5) and 3 kg of boron until the spring of 2020. The application of nitrogen significantly increased dry matter yield compared to any of the other treatments. The unfertilized treatment gave significantly lower values than the other that received phosphorus, potassium or boron. In general, the biomass of a given treatment proved to be richer in the nutrient applied in the corresponding treatment. The application of phosphorus, potassium and boron increased the concentration of these nutrients in the soil. Organic matter and nutrient content in the soil were higher in the top layer, while soil pH was less alkaline in the surface layer.
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Keywords
Pastagem Produção de biomassa Composição elemental Fertilidade do solo