30 documents found, page 1 of 3

Gestão de efluentes vinícolas: potencialidades da sua reutilização na rega de e...

Neste estudo pretendeu-se avaliar a possibilidade da reutilização de um efluente vinícola (EV) tratado para rega de espécies ornamentais. Para tal, realizaram-se inicialmente testes de fitotoxicidade em sementes de Lepidium sativum e de uma mistura de relva, sujeitas a concentrações crescentes de EV e um ensaio de rega em Petunia x atkinsiana com diferentes tratamentos: EV sem diluição (EV100%), efluente diluíd...

Aplicação de boro na amendoeira [Prunus dulcis (Mill.) D.A. Webb.]: efeito na f...

Nos últimos anos, tem-se assistido a um crescente interesse pela cultura da amendoeira (Prunus dulcis (Mill .) D.A.Webb.) na região de Trás-os-Montes, justificado pelo aumento de preço pago da amêndoa, ao produtor. Apesar da excelente adaptabilidade desta cultura as condições edafo-climáticas desta região, continuam a existir baixas rentabilidades devido, em parte, a instalação deficiente de muitos amendoais tr...

Study of textural, chemical, color and sensory properties of organic blueberrie...

Leguminous cover crops improve the profitability and the sustainability of rain...

The olive sector has a crucial economic, social, cultural and ecological relevance in the Mediterranean region, where tillage and herbicides application still are generalized practices. However, these techniques oppose to the recommendations of UE policy. Thus, other methods are needed to reduce adverse environmental impacts and to improve biodiversity, soil carbon sink and fertility, to save fossil fuels and t...

Efeito de longo prazo de um coberto de leguminosas semeadas em olival de sequei...

O uso de coberturas vegetais em olivais tradicionais de sequeiro continua a não ser uma opção dos olivicultores transmontanos. A maior parte dos produtores continua a mobilizar os seus olivais e um grupo restrito, ainda que progressivamente crescente, utiliza herbicidas. De facto, apesar das vantagens reconhecidas às coberturas vegetais, designadamente no controlo da erosão hídrica e no incremento da matéria or...

Green manure legumes affect seasonal soil and leaf CO2 exchange rates in an oli...

Management methods that decrease requirement for agricultural chemicals are needed to reduce adverse environmental impacts. Moreover, they can play an important role in atmospheric C02 emission and fixation. We propose green manure legumes to reduce erosion, soil compaction and nitrate pollution, to improve biodiversity, soil carbon sink and fertility, to save fossil fuels and to increase yield and the nutritio...

Short and long-term benefits of white lupin as a cover crop on olive physiology

Several positive effects of cover crops in orchards have been documented, including improvement on soil properties, which are reflected on tree physiological performance and yield. The use of legume species, such as white lupin, can provide other gains since they can fix atmospheric N2, reducing the cost with N fertilizers. However, this species need to be sown every year, which is costly and laborious. So, we ...

Sustainable management of olive rainfed orchards by the introduction of legumin...

The olive sector has a crucial economic, social, cultural and ecological relevance in the Mediterranean region, where tillage and herbicides application are still generalized practices. However, these practices oppose the recommendations of UE Common Agricultural Policy and thus, management methods that decrease requirement for agricultural chemicals are needed to reduce adverse environmental impacts. Moreover,...

Oxidative stress and antioxidant responses in olive tree subjected to cover cro...

Since Mediterranean basin is particularly vulnerable to present and future climate variability and climate change, olive tree will experiment some hard changes in its environment. Under adverse conditions, imbalances in metabolic processes may lead to increased accumulation of ROS, forming a potential threat of oxidative damage to cells. We propose green manure legumes to shift tillage, in order to improve soil...

Soil nitrogen availability in olive orchards after mulching legume cover crop r...

A natural source of nitrogen (N) is needed to increase soil fertility in traditional olive orchards and to maintain the N nutritional status of olive trees. With this aim, we studied the introduction of legume cover crops in two olive orchards, which were converted into mulches and left on the ground as phytomass after they had been cut. The experiments were carried out in Suçães and Qta do Carrascal, NE Portug...