156 documents found, page 1 of 16
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 ...
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...
Sewage Sludge Increased Lettuce Yields by Releasing Valuable Nutrients While Ke...
Rodrigues, M.A.; Sawimbo, Almeida; Silva, Julieta Moreira da; Correia, Carlos M.; Arrobas, MargaridaSewage sludge can be used as an organic amendment as long as it is ensured that there is no risk of environmental contamination or risk to public health. In this study, sewage sludge from two wastewater treatment plants (WWTPs) subjected to two disinfection and stabilization treatments [40% (mass/mass), calcium oxide, and calcium hydroxide] and their respective untreated sewage sludge were used. Three control t...
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...
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...
Nitrogen-Rich Sewage Sludge Mineralized Quickly, Improving Lettuce Nutrition an...
Arrobas, Margarida; Meneses, Ramily; Gusmão, Andressa Griebler; Silva, Julieta Moreira da; Correia, Carlos M.; Rodrigues, M.A.Sewage sludge should primarily find use in agriculture, reducing the quantity directed towards alternative disposal methods like incineration or deposition in municipal landfills. This study evaluated the agronomic value and the risk of soil and plant tissue contamination with heavy metals in sewage sludge obtained from two wastewater treatment plants (WWTP). The experiment was arranged as a 2 × 5 factorial (tw...
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...
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...
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...
Development of a functional prototype for recovery of recycled expanded polysty...
Leite, Pedro; Correia, Carlos M.; Araújo, Raquel; Tinoco, João; Gama, Nuno; Ferreira, Paula; Gonçalves, Idalina; Neto, Victor; Zhiltsova, TatianaExpanded polystyrene (EPS) is composed of 98% air and 2% polystyrene (PS). EPS parts are made up of PS beads that contain a blowing agent, typically pentane, entrapped into their interior, allowing them to expand and form a honeycomb-similar cellular structure. The expandable PS beads allow for efficient storage and transportation while also providing control over density in separate steps (pre-expansion and mo...