16 documents found, page 1 of 2
A Spray Foliar Containing Methylobacterium symbioticum Did Not Increase Nitroge...
Rodrigues, Manuel Ângelo; Lopes, João Ilídio; Martins, Sandra; Brito, Cátia; Correia, Carlos M.; Arrobas, Margarida; Rodrigues, Manuel ÂngeloBiological nitrogen (N) fixation has been advocated in agricultural fields due to being considered a more sustainable way to introduce N into agrosystems than industrial N fertilizers. In this study, a foliar spray inoculant containing the microorganism Methylobacterium symbioticum was applied. This microorganism is known for fixing N in the phyllosphere, regardless of the cultivated species. This study was con...
Photosynthesis, yield, nutrient availability and soil properties after biochar,...
Lopes, João Ilídio; Arrobas, Margarida; Raimundo, Soraia; Gonçalves, Alexandre; Brito, Cátia; Martins, Sandra; Pinto, Luís; Moutinho-Pereira, JoséSoil conditioners and beneficial microorganisms are important tools that can be used to increase the sustainability of agro-systems. However, the high diversity of conditions where they can be applied may influence the results, which requires extensive field research. In this study, a field trial of four years was conducted in olive (Olea europaea L.) to assess the effect of biochar, zeolites and a commercial m...
New options of soil amendment for sustainable management of rainfed olive groves
Lopes, João IlídioAgriculture is an important source of greenhouse gas (GHG) emissions, contributing strongly to climate change and, at the same time, it is one of the most affected economic sectors, particularly due to changes in rainfall and temperature patterns. As the regions with Mediterranean climate are "hot spots" of climate crisis, negative effects are expected on olive tree crop, especially under rainfed conditions. At...
A fertilização mineral com alta dose de azoto aumentou a produção de azeitona e...
Lopes, João Ilídio; Arrobas, Margarida; Gonçalves, Alexandre; Brito, Cátia; Martins, Sandra; Moutinho-Pereira, José; Rodrigues, M.A.; Correia, Carlos M.Resíduos orgânicos de atividades domésticas ou agroindustriais devem ser reciclados, sendo o seu uso como corretivo de solo uma possibilidade interessante. Neste estudo, avaliouse durante quatro anos o efeito da aplicação de resíduos sólidos urbanos (RSU), estrume de curral (EC), cinzas de biomassa suplementadas com azoto (C+N), fertilização inorgânica comum na região (50 kg ha-1 de N, P20 S e K20) como testemu...
Arbuscular mycorrhizal fungi inoculation reduced the growth of pre-rooted olive...
Lopes, João Ilídio; Correia, Carlos M.; Gonçalves, Alexandre; Silva, Ermelinda; Martins, Sandra; Arrobas, Margarida; Rodrigues, M.A.The effect of commercial mycorrhizal fungi on pre-rooted olive cuttings was assessed. The study consisted of two experiments, the first arranged as a factorial design with three cultivars (Cobrançosa, Madural, and Verdeal Transmontana) and three soil treatments (commercial mycorrhizal fungi, zeolites, and control) and the second as a completely randomized design with three treatments (commercial mycorrhizal fun...
Produção de azeitona e propriedades do solo em olival de sequeiro após aplicaçã...
Lopes, João Ilídio; Correia, Carlos M.; Raimundo, Soraia; Gonçalves, Alexandre; Moutinho-Pereira, José; Martins, Sandra; Brito, CátiaEspera-se que condicionadores de solo e microrganismos benéficos reduzam o uso de fertilizantes minerais em sistemas agrícolas de baixa intervenção fitotécnica. Neste estudo, um ensaio de campo de quatro anos foi conduzido em olival adulto de sequeiro para avaliar o efeito da aplicação de biochar, zeólitos e fungos micorrízicos comerciais no desempenho fotossintético, estado hídrico e nutricional das árvores, p...
Inorganic fertilization at high n rate increased olive yield of a rainfed orcha...
Lopes, João Ilídio; Gonçalves, Alexandre; Brito, Cátia; Martins, Sandra; Pinto, Luís; Moutinho-Pereira, José; Raimundo, Soraia; Arrobas, MargaridaStrategies for waste valorisation from domestic and agro-industrial activities must be pursued, and its use as a soil amendment is an interesting possibility. In this four-year study, the effect of applying municipal solid waste (MSW), farmyard manure (FYM), bottom wood ash supplemented with nitrogen (Ash + N), the inorganic fertilization common in the region (50 kg ha−1 N, P2O5 and K2O) (Control) and this inor...
Mycorrhizal fungi were more effective than zeolites in increasing the growth of...
Lopes, João Ilídio; Arrobas, Margarida; Brito, Cátia; Gonçalves, Alexandre; Silva, Ermelinda; Martins, Sandra; Raimundo, Soraia; Rodrigues, M.A.Four soil treatments, consisting of two commercial mycorrhizal fungi, one zeolite and an untreated control, were arranged in a factorial design with two foliar fertilization treatments, a foliar spray and a control to study the effects of commercial mycorrhizal fungi and zeolites on the growth of young, rainfed olive trees planted in very acidic soil. The concentrations in the plant tissues of most of essential...
Effect of organic amendments and other soil conditioners on olive tree producti...
Lopes, João Ilídio; Rodrigues, M.A.; Gonçalves, Alexandre; Pinto, Luís; Martins, Sandra; Moutinho-Pereira, José; Raimundo, Soraia; Arrobas, MargaridaThe use of organic matter and other soil conditioners can increase the resilience of the agrosystems to the degradation of plant growth conditions due to global warming. The problem is particularly important in rainfed orchards, where the extensive summer period tends to severely hamper tree growth and development and crop productivity. In February 2017 a field trial was installed in Mirandela (NE Portugal) in ...
Olive tree response to the severity of pruning
Rodrigues, M.A.; Lopes, João Ilídio; Ferreira, Isabel Q.; Arrobas, MargaridaPruning has been seen as a means of improving olive tree productivity. The presumed importance of pruning was described by Columella (born 4 AD), and has persisted in general terms to the present. In this work, the effect of different pruning regimes was assessed from two field trials conducted in Mirandela, NE Portugal, in an olive grove of cv. ‘Cobrançosa’, rainfed managed. The first trial began after a light...