A5049284407- Silicon Effects in Agriculture
- Geochemistry and Elemental Analysis
- Arsenic contamination and mitigation
- Aluminum toxicity and tolerance in plants and animals
- Soil Carbon and Nitrogen Dynamics
- Soil and Land Suitability Analysis
- Geology and Paleoclimatology Research
- Agriculture Sustainability and Environmental Impact
- Soil erosion and sediment transport
- Heavy metals in environment
- Irrigation Practices and Water Management
- Soil Geostatistics and Mapping
- Plant nutrient uptake and metabolism
- Geochemistry and Geologic Mapping
- Environmental Impact and Sustainability
- Soil Management and Crop Yield
- Geomagnetism and Paleomagnetism Studies
- Clay minerals and soil interactions
- Crop Yield and Soil Fertility
- Sustainable Agricultural Systems Analysis
- Light effects on plants
- Peatlands and Wetlands Ecology
- Sustainable Development and Environmental Policy
- Plant Ecology and Soil Science
- Soil Mechanics and Vehicle Dynamics
University of Lisbon
2010-2023
University of Évora
2017-2020
University of Antwerp
2012-2015
Instituto Superior Técnico
2010
Instituto Politécnico de Lisboa
2010
Abstract Besides well‐known effects of climate and parent material on silicate weathering the role land use change as a driver in global silicon cycle is not well known. Changes vegetation cover have altered reservoirs carbon plants soils. This has potential consequences for plant‐Si availability, agricultural yields, coastal eutrophication, Si beneficial element many crop an essential nutrient diatom growth. We here examined sustained intensive human disturbance (Si) pool distribution soils...
Recent research established a link between environmental alterations due to agriculture intensification, social damage and the loss of economic growth. Thus, integration dimensions is key for development. In recent years, several frameworks have been proposed assess overall sustainability farms. Nevertheless, myriad existing variety indicators result in difficulties selecting most appropriate framework study site application. This manuscript aims to: (i) understand criteria select summarize...
Summary The primary source of dissolved silicon ( S i: DSi ) is the weathering silicate minerals. In recent years, it has been shown that Si cycling through vegetation creates a more soluble pool in soil, as amorphous ASi deposits plants (phytoliths) are returned to soil litter. Amorphous accumulation soils depends on number factors, including land use. addition biogenic fraction, contain other non‐biogenic and sorbed fractions could contribute significantly export rivers, but hitherto these...
Abstract Silicon (Si) is a “ quasi-essential ” element, associated to stresses/limitations alleviation in crops. However, stressful situations are becoming the norm, due climate change, human exhaustion of natural resources, land degradation and loss soil biodiversity . In this context, Si becomes critical capacitating crops grow more better with less. A total 467 articles up 2021 were selected, reporting 501 experiments (lab-oriented field trials) resulting 682 cases where different...
Abstract The biogeochemical cycling of silicon (Si) along the land‐to‐ocean continuum is studied by a variety research fields and for scientific reasons. However, there an increasing need to refine methodology underlying assumptions used determine biogenic silica (BSi) concentrations. Recent evidence suggests that contributions nonbiogenic sources Si dissolving during alkaline extractions, not corrected standard silicate mineral dissolution correction protocols, can be substantial. ratio...
Abstract The intensification of agricultural practices to increase food and feed outputs is a pressing challenge causing deterioration soil quality functions. Such demands provision empirical evidence provide context‐sensitive guidance on management (AMPs) that may enhance quality. objectives this study are identify the most promising AMPs (and their combinations) applied by farmers with positive effects evaluate sensitivity indicators AMPs. effect selected was assessed using visual...
Drought is a worldwide problem, especially in arid and semi-arid regions. Detection of drought stress at the initial stages, before visible signs, to adequately manage irrigation crop fertilization avoid yield loss, desire most farmers. Here, we evaluated response tomato plants water scarcity, through changes leaf reflectance due modification pigments’ content, which translates into differences spectral indices (SRI) values. Our methodology innovative, as were able easily calculate identify...
Despite increasing recognition of the relevance biological cycling for Si in ecosystems and export from soils to fluvial systems, effects human cultivation on cycle are still relatively understudied. Here we examined stable isotope (δ30Si) signatures soil water samples across a temperate land use gradient. We show that – independent geological climatological variation there is depletion light isotopes intensive croplands managed grasslands relative native forests. Furthermore, our data...
Animal production systems are increasingly required to co-produce meat products and other ecosystem services. Sown biodiverse pastures (SBP) were developed in Portugal as an improvement over semi-natural (SNP). SBP increase yields animal intake during grazing, substantial carbon sinks, the abundance of legumes mixtures provides plants with a biological source nitrogen. However, data available demands most models make integrated modelling these effects difficult. Here, we “BalSim”, mass...
Abstract. Land use change (deforestation) has several negative consequences for the soil system. It is known to increase erosion rates, which affect distribution of elements in soils. In this context, crucial nutrient Si received little attention, especially a tropical context. Therefore, we studied effect land conversion and intensity on biogenic silica pools subtropical south Brazil. Biogenic (BSi) was determined using novel alkaline continuous extraction where ∕ Al ratios fractions...
Abstract. Biogenic silica (BSi) is used as a proxy by soil scientists to identify biological effects on the Si cycle and palaeoecologists study environmental changes. Alkaline extractions are typically measure BSi in both terrestrial aquatic environments. The dissolution properties of volcanic glass tephra deposits their nanocrystalline weathering products hypothesized overlap those BSi; however, data support this behaviour lacking. potential that Si-bearing fractions dissolve alkaline media...
Simulation results for water content distribution obtained with HYDRUS, RZWQM and MOHIDLAND models were compared field data. These differ mainly in calculating root uptake computing crop requirements. Simulations carried out different horizons of an Hortic Anthrosol Eutric Fluviosol, located the Alentejo region (Portugal). Soil was measured, a TDR system at depths. hydraulic properties determined laboratory, described HYDRUS Mualem-van Genuchten, modified Brooks Corey equations....
Basaltic weathering from volcanic islands plays a critical role in the climate feedback loop. Geochemical and models require information on rate of secondary mineral formation. We provide direct evidence for precipitation amorphous Si organic rich acidic Histic Andosols compared to preferential allophane formation poor less Haplic Andosols. Similar results have been obtained pioneering work by Opfergelt et al1 using isotope composition. Additionally, enhanced Andosols, independent long-term...
Soil organic matter (SOM) stocks are crucial for soil fertility and food provision also contribute to climate change adaptation mitigation. However, assessing SOM changes in cropping systems is difficult due the varying quantity quality of input data. processes have been described by several models, but these complex require high amounts In this work, we identified selected frameworks that simulate pools as well effects different management practices. We required be easily accessible...
Phosphorus (P) is an essential element in food production, but it often largely unavailable for plants as persists soils immobilized forms. Farmers have been using P fertilizers extensively to overcome this unavailability, leading the exhaustion of non-renewable deposits phosphorite, rising prices and causing several environmental impacts such eutrophication. Its large-scale utilization also inefficient since most added becomes quickly plants. Therefore, farming solutions that improve...