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Showing 1 to 14 of 14 for “"Ammonification"”.
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Gross N turnover and soil solution chemistry as influenced by fluctuations of soil water potential and water table in a Podzol and a fen soil
… on net N turnover rather than gross rates. Net ammonification and nitrification include two major processes: gross ammonification and gross nitrification on the one side and microbial immobilization on the other side. To identify the response of specific processes to soil drying, gross rates …
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Carbon and nitrogen mineralization in temperate forest soils at low temperatures
… beech and Norway spruce forest soil. Gross ammonification, gross nitrification, net N and C mineralization as well as the temperature response of these processes (Q10 value) were determined at low temperatures. The influence of substrate quality and availability on the temperature dependence …
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Seasonal Variation in Rates of Nitrification Associated with Patterns of Carbon and Nitrogen Supply in a Southern Appalachian Headwater Stream
… most closely and positively related to rates of ammonification, which, in turn were negatively related to C:N of fine benthic organic matter (FBOM). Uniform additions of C and N throughout the year had different effects on rates of nitrification and ammonification due to their changing relative …
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Leaf Traits, Neighbors, and Abiotic Factors: Ways That Context Can Mediate the Impact of Invasive Species on Nitrogen Cycling
… on soil N pools and fluxes, primarily net ammonification, between sites through direct, indirect, and interactive pathways. Notably, we detected a scenario in which forest openness has a negative direct effect and indirect positive effect on ammonification in sites with high soil moisture …
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Development of a continuous, physically-based distributed parameter, nonpoint source model
… mineralization simulated as a combination of ammonification and nitrification, denitrification, and plant uptake of ammonium and nitrate. The model maintains a dynamic equilibrium between stable and active organic N pools.
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Perennial energy crops on riparian buffers affect nitrogen cycling microbial communities
… involved in ammonia oxidation (amoA), nitrite ammonification (nrfA), denitrification (nirK, nirS, norB, and nosZ), and N fixation (nifH). The results indicated that N application significantly affected the abundance of four different functional enzyme groups. The abundance of bacterial amoA …
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Novel studies of the dynamics of mineral N species transformations and their mobilities relevant to assessing risks to drainage water.
… mobility of mineral N species. It was found that ammonification proceeds after net nitrification has ceased, and that subsequently nitrate is immobilized when the drying period is protracted. It is suggested that this is probably due to uptake by drought-tolerant microorganisms. The experimental …
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The influence of redox dynamics on nitrogen cycling and nitrous oxide emissions from soils
… water dynamics, nitrous oxide emissions, nitrate ammonification,feammox, denitrification, soil heterogeneity, oxygen, redox.
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Carbon and nitrogen removal in a granular bed baffled reactor
… and methane production. No noticeable ammonification was observed with glucose and brewery wastewaters during nitrate reduction. The simpler forms of carbon sources, like acetate and VFA, were found to be a more efficient substrate in terms of carbon and nitrate removal than glucose. …
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In-situ Ammonia Removal Of Leachate From Bioreactor Landfills
… recirculating leachate increases the rate of ammonification and results in accumulation of higher levels of ammonia-nitrogen concentrations, even after the organic fraction of the waste is stabilized. Because ammonia-nitrogen persists even after the organic fraction of the waste is stabilized, …
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Turnover and fluxes of carbon and nitrogen in a spruce forest under natural and extreme meteorological conditions
… layer was more negatively influenced than net ammonification, indicating that nitrifiers are more sensitive to drought stress than ammonifiers. The effect of soil frost strongly depended on soil freezing temperature. Only soil frost at temperature below -8°C led to short periods of additional …
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Microbial nitrogen-cycling and cooperation in the terrestrial subsurface
… biological N-transformation processes, including ammonification, nitrogen fixation, nitrification, denitrification, anaerobic ammonium oxidation (anammox), and assimilation. The microorganisms that perform these processes can be sources and sinks of nitrate – a major anthropogenic contaminant of …
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Primary sedimentation tank model with characterized settling velocity groups
… phenomena such as flocculation, coagulation, ammonification or hydrolysis. The modelling of primary sedimentation has often been overlooked because (i) it involves various intricacies that are difficult to replicate and (ii) primary sedimentation has been assumed to be an input to most of the …