7 documents found, page 1 of 1
Biochar Increases Water Use Efficiency in Eucalypt Plants Under Water and Nutri...
Verheijen, Frank G. A.; Bastos, Ana Catarina; Vasques, Ana; Mesquita, Raquel; Keizer, Jan J.; Silva, Flávio C.; Jesus, Claudia; Amaral, JoanaSoil amendment with biochar is being considered as a strategy for improving available soil water and nutrient content and, thereby, plant performance. Our aim was to investigate whether physiological, biochemical and morphological responses of Eucalyptus globulus to biochar amendment were dependent on watering regime. We conducted a randomized, 6-week greenhouse experiment with 5-month old eucalypt rooted cutti...
Critical review of key variables affecting potential recycling applications of ...
Cruz, Nuno C.; Silva, Flávio C.; Tarelho, Luís A. C.; Rodrigues, Sónia M.Growing quantities of biomass ash are produced worldwide due to an increasing use of biomass for heat and electricity generation. Physical-chemical properties and elemental composition of ash at industrial biomass thermal power plants show significant variations. Experimental methods to characterize ashes are time-consuming and difficult to implement on a routine basis, posing severe limitations to the selectio...
Effect of moss crusts on mitigation of post-fire soil erosion
Silva, Flávio C.; Vieira, Diana C.S.; van der Spek, Els; Keizer, J. JacobMosses and wildfires are ubiquitous occurrences. Their correlation has been assessed in few studies. Mosses have been pointed as pioneer species in post-fire environments. However, reasons for moss crusting in post-wildfire soils and their ecosystem role in preventing soil erosion have not been quantitatively assessed. Moss crusts have quickly developed after a wildfire in a hillslope of eucalypt plantations, i...
The influence of biochar particle size and concentration on bulk density and ma...
Verheijen, Frank G. A.; Zhuravel, Anna; Silva, Flávio C.; Amaro, António; Ben-Hur, Meni; Keizer, Jan JacobBiochar application to agricultural soils has been proposed as a way to increase crop production by improving soil chemical and physical properties. Liming potential and improved nutrient exchange on biochar surfaces are the most reported mechanisms. Wherever crops experience drought stress, improvements in soil water holding capacity (WHC) might also be an important mechanism. However, reported effects on soil...
Short-term effects of post-fire salvage logging on runoff and soil erosion
Malvar, Maruxa C.; Silva, Flávio C.; Prats, Sergio A.; Vieira, Diana C.S.; Coelho, Celeste O.A.; Keizer, J. JacobResearch has been undertaken on the hydrological and erosional impact of forest fires, but remarkably little work has been conducted on salvage logging operations that often follow them. We assessed the effects of mechanical salvage logging following wildfire on soil physical properties, ground cover, and runoff and erosion response on a eucalypt stand in Portugal. We compared two levels of mechanical disturban...
Olive oil mill wastewater to volatile fatty acids: statisticals study of the ac...
Gameiro, Tânia; Sousa, Fátima; Silva, Flávio C.; Couras, Cátia; Lopes, Maria; Louros, Vitória; Nadais, Helena; Capela, IsabelThe aim of the present paper was to study the feasibility of using olive oil mill wastewater (OOW) to produce a mixture of volatile fatty acids (VFA) adequate for producing polyhydroxyalkanoates (PHA) with better mechanical properties in a later aerobic phase. Hence, thiswastewater can be valorized rather than only treated, and its organic pollutant content can result in valueadded products with a sustainable o...
Optical fiber technology for monitoring and preventing biomass washout from bio...
Silva, Flávio C.; Martins, Martinho A. S.; Bilro, Lúcia; Nogueira, Rogério N.; Capela, Isabel; Jacob Keizer, J.A novel plastic optical fiber (POF) sensor was investigated to monitor total suspended solids (TSS) concentration continuously, offering insights into wastewater treatment bioreactors without disturbing them. First, off-line experiments with both anaerobic and aerobic sludge (in concentrations ranging between 0.1 and 8.6 g TSS L−1) were used to establish the exponential relationship of the sensor’s transmitted ...