67 documents found, page 1 of 7
Effect of Foliar Application of Nitrogen-Fixing Microorganisms and Algae Extrac...
Arrobas, Margarida; Roque, João; Martins, Sandra; Brito, Cátia; Correia, Carlos M.; Rodrigues, Manuel ÂngeloThis study presents the results of two on-farm trials evaluating the efficacy of a nitrogen (N)-fixing inoculant (Methylobacterium symbioticum) applied as a foliar spray to provide N to hazelnut (Corylus avellana L.) and walnut (Juglans regia L.) trees. In the hazelnut trial, a factorial design was employed with soil N application at three levels [0 (N0), 40 (N40), and 80 (N80) kg ha−1] and foliar application o...
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...
Biomass and nutrient release dynamics of decomposing rolling down legume cover ...
Brito, Cátia; Martins, Sandra; Saraiva, Francisco; Roque, João; Arrobas, Margarida; Rodrigues, Manuel Ângelo; Correia, CarlosWell-managed cover crops are gaining traction as an alternative to conventional tillage, offering a range of agronomic and ecological benefits. This field study, conducted in a commercial vineyard in the Douro region (Portugal) during the 2022/2023 growing season, evaluated the decomposition dynamics and nutrient release from different legume cover crop residues over a period of 183 days after sowing and 114 da...
Differential responses of photosynthesis, yield and soil properties 4 years aft...
Martins, Sandra; Brito, Cátia; Gonçalves, Alexandre; Moutinho-Pereira, José; Pereira, Ermelinda; Arrobas, Margarida; Rodrigues, M.A.; Nunes, FernandoOlive orchards represent a key agricultural system in the Mediterranean Basin. Soil degradation processes associated with unsustainable agronomic practices and climate change could severely impact the sustainability of Mediterranean rainfed olive orchards. In this context, soil amendments are important tools that can be used to enhance soil fertility for sustained environmental quality and plant performance. In...
Combining zeolites with early-maturing annual legume cover crops in rainfed orc...
Martins, Sandra; Silva, Ermelinda; Brito, Cátia; Pinto, Luís; Martins-Gomes, Carlos; Gonçalves, Alexandre; Arrobas, Margarida; Rodrigues, M.A.Under climate change threats, there is a growing need to adapt the conventional agronomic practices used in rainfed olive orchards by sustainable practices, in order to ensure adequate crop yield and olive oil quality and to preserve soil health. Therefore, for two years, the effects of conventional tillage practice (T) and two sustainable soil management strategies, a leguminous cover crop (LC) and its combina...
Dolomitic limestone was more effective than calcitic limestone in increasing so...
Arrobas, Margarida; Conceição, Nuno; Pereira, Ermelinda; Martins, Sandra; Raimundo, Soraia; Brito, Cátia; Correia, Carlos M.; Rodrigues, M.A.In acid soils, when no-tillage farmers intend to apply lime, the question arises as to whether it should be incorporated into the soil or whether it can be left on the soil surface. In this study, two types of limestone, calcitic (Lcal) and dolomitic (Lmag), were tested in two olive groves of cv. Cobrançosa, with an initial pH of 4.9 (S. Pedro) and 5.5 (Raparigas). In S. Pedro, limestone was incorporated into t...
Olive yield and physicochemical properties of olives and oil in response to nut...
Silva, Ermelinda; Gonçalves, Alexandre; Martins, Sandra; Brito, Cátia; Ferreira, Helena; Ferreira, Luís M.M.; Moutinho-Pereira, José; Rodrigues, M.A.The effects of mineral fertilizers on the physicochemical properties of olives and oil under rainfed conditions is scarce. In this three-year study, the results of a nitrogen (N), phosphorus (P), potassium (K) and boron (B) fertilization trial carried out in a young rainfed olive grove and arranged as a nutrient omission trial are reported. The control consisted of the application of N, P, K and B (NPKB) and fo...
Synergy between zeolites and leguminous cover crops improved olive tree perform...
Martins, Sandra; Brito, Cátia; Silva, Ermelinda; Gonçalves, Alexandre; Arrobas, Margarida; Pereira, Ermelinda; Rodrigues, M.A.; Nunes, Fernando M.Soil degradation and climate change are threatening the sustainability of Mediterranean olive orchards, typically grown under rainfed conditions and conventional soil tillage. Thus, implementing sustainable soil management practices is crucial to preserve soil health and mitigate the negative effects on plant performance. In this study, we assessed the effects of conventional tillage (T), an early maturing and ...
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...
Improving the sustainability of rainfed olive orchards by using zeolites and ea...
Martins, Sandra; Silva, Ermelinda; Brito, Cátia; Pinto, Luís; Martins-Gomes, Carlos; Gonçalves, Alexandre; Arrobas, Margarida; Rodrigues, M.A.Olive cultivation is considered as one of the most significant agricultural activities in Mediterranean region, from a financial, social and ecological point of view. Under climate change threats, there is a growing need to adapt the conventional agronomic practices used in rainfed olive orchards by sustainable practices, in order to preserve soil health, while ensure olive tree performance and olive oil qualit...