Search results for " soil respiration"

showing 3 items of 3 documents

Biogeochemical responses to nutrient, moisture and temperature manipulations of soil from Signy Island, South Orkney Islands in the Maritime Antarctic

2014

AbstractWe have investigated how the microbially-driven processes of carbon (C) mineralization (respiration) and nitrogen (N) mineralization/immobilization in a soil from the northern Maritime Antarctic respond to differences in water availability (20% and 80% water-holding capacity) and temperature (5°C and 15°C) in the presence and absence of different organic substrates (2 mg C as either glucose, glycine or tryptone soy broth (TSB) powder (a complex microbial growth medium)) in a controlled laboratory experiment over 175 days. Soil respiration and N mineralization/immobilization in the presence of a C-rich substrate (glucose) increased with increases in water and temperature. These facto…

Biogeochemical cycleMoistureChemistrySettore AGR/13 - Chimica Agrariacarbon mineralization nitrogen mineralization organic substrates soil respiration warming water additionGeologyMineralization (soil science)OceanographySoil respirationNutrientEnvironmental chemistryBotanyRespirationCyclingNitrogen cycleEcology Evolution Behavior and SystematicsAntarctic Science
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In situ polymerization of soil organic matter by oxidative biomimetic catalysis

2017

Abstract Background Agricultural practices that enhance organic matter content in soil can play a central role in sequestering soil organic carbon (SOC) and reducing greenhouse gases emissions. Methods We used a water-soluble iron-porphyrin to catalyze directly in situ oxidative polymerization of soil organic matter in the presence of H2O2 oxidant, with the aim to enhance OC stabilization, and, consequently, reduce CO2 emissions from soil. The occurred SOC stabilization was assessed by monitoring soil aggregate stability, OC distribution in water-soluble aggregates, soil respiration, and extraction yields of humic and fulvic acids. Results Soil treatment with H2O2 and iron-porphyrin increas…

CO2 emissions Soil carbon sequestrate Soil organic matter Soil respiration Oxidative biomimetic catalysisSettore AGR/13 - Chimica Agraria010501 environmental sciencesCO2 emissions01 natural sciencesBiochemistrycomplex mixturesSoil respirationlcsh:AgricultureOrganic matter0105 earth and related environmental scienceschemistry.chemical_classificationSoil organic matterSoil organic matterlcsh:SSoil chemistry04 agricultural and veterinary sciencesSoil carbonMineralization (soil science)Soil respirationOxidative biomimetic catalysischemistryPolymerizationEnvironmental chemistrySoil water040103 agronomy & agriculture0401 agriculture forestry and fisheriesSoil carbon sequestrationAgronomy and Crop ScienceFood ScienceBiotechnologySettore AGR/16 - Microbiologia AgrariaChemical and Biological Technologies in Agriculture
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Evaluating carbon fluxes in orange orchards in relation to planting density

2009

SUMMARYOrange (Citrus sinensis L.) is one of the main fruit crops worldwide and its evergreen orchards may have a great potential for carbon (C) sequestration, but no data are currently available. In order to understand carbon fluxes in orange orchards, an experiment was undertaken on traditional and intensive planting systems.The experiment used C. sinensis scions grafted onto Citrus aurantium (bitter orange) rootstock. One orchard contained 14-year-old trees of the cv. Tarocco Scirè (a blood orange) grown in a traditional system with 494 trees/ha. The second orchard contained 12-year-old trees of the cv. Newhall (a seedless navel orange) grown in an intensive system with 1000 trees/ha. Ne…

CanopySowingcarbon balance net primary productivity planting systems soil respirationOrange (colour)EvergreenBiologySoil respirationHorticultureBotanyGeneticsAnimal Science and ZoologyOrchardRootstockAgronomy and Crop ScienceCitrus × sinensis
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