158 documents found, page 1 of 16
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...
Sewage sludge showed high agronomic value, releasing nitrogen faster than farmy...
Dimande, Paulo; Arrobas, Margarida; Correia, Carlos M.; Rodrigues, Manuel ÂngeloThe use of fertilizers in agriculture, particularly organic fertilizers such as sewage sludge, is a key research priority due to its impacts on crop productivity, production costs, environmental risks and the push for a more circular economy. This study, conducted in Bragan & ccedil;a, northeastern Portugal, focused on forage maize during the 2022 and 2023 growing seasons. Eight fertilization treatments were es...
Methylobacterium symbioticum Applied as a Foliar Inoculant Was Little Effective...
Arrobas, Margarida; Correia, Carlos M.; Rodrigues, M.A.Nitrogen (N) is a limiting ecological factor for plant growth in most agroecosystems. Biological N fixation, especially from nodulated legumes, has been promoted in recent decades as an alternative or complement to industrially synthesized N fertilizers. The possibility of utilizing N-fixing organisms from the phyllosphere that demonstrate effectiveness across a wide range of crops is particularly exciting. In ...
Ground Management Through Grazing in Rainfed Olive Orchards Provides High Olive...
Dimande, Paulo; Arrobas, Margarida; Correia, Carlos M.; Rodrigues, M.A.Soil management in orchards can have several economic and environmental implications. In this study, three different soil management systems were compared in a dry-farmed olive grove: conventional tillage (tillage), glyphosate-based herbicide (herbicide) and sheep grazing. The experiment lasted eleven years (2011-2022) and was carried out after a previous trial conducted on the same plot with the same treatment...
Assessing the Effect of Plant Biostimulants and Nutrient-Rich Foliar Sprays on ...
Roque, João; Carvalho, Ana; Rodrigues, M.A.; Correia, Carlos M.; Lima-Brito, JoséThe cultivation of walnuts (Juglans regia L.) has become increasingly popular worldwide due to the nutritional value of the nuts. Plant biostimulants (PBs) and nutrient-rich products have been increasingly used in agriculture to improve yield, quality, and abiotic stress tolerance. However, farmers need fast laboratory studies to determine the most suitable treatment per crop or ecosystem to take full advantage...
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...
Nitrogen Fixation and Growth of Potted Olive Plants through Foliar Application ...
Rodrigues, M.A.; Raimundo, Soraia; Correia, Carlos M.; Arrobas, MargaridaGiven the importance of biological nitrogen (N) fixation in agroecosystems, using inoculants with phyllosphere N fixers effective across various crops would revolutionize agriculture. In this study, the application of an inoculant prepared from Methylobacterium symbioticum was tested on young olive trees. The pot experiment was arranged in a factorial design, with inoculant (Yes and No) and mineral N applied to...
The Application of a Foliar Spray Containing Methylobacterium symbioticum Had a...
Rodrigues, M.A.; Correia, Carlos M.; Arrobas, MargaridaIn this study, the effectiveness of an inoculant containing a nitrogen (N)-fixing microorganism (Methylobacterium symbioticum) was evaluated on maize (Zea mays L.) grown both in the field (silage maize) and in pots over two years (2021 and 2022). The field trial included the following two treatments: with (Yes) and without (No) the inoculant. The pot experiment was designed as a factorial arrangement with two f...
Omitting the Application of Nitrogen or Potassium Reduced the Growth of Young C...
Arrobas, Margarida; Raimundo, Soraia; Correia, Carlos M.; Rodrigues, M.A.The chestnut tree (Castanea sativa Mill.) is gaining importance in the mountainous regions of southern Europe due to the high value of its fruits. It is essential to establish effective cultivation protocols, considering that this species is still relatively understudied. In this study, we present the outcomes of the initial establishment of a chestnut orchard conducted through a nutrient omission trial for fou...