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A conversion of the global terrestrial carbon sink to a source is critically dependent on the microbially mediated decomposition of soil organic matter (SOM). We have developed a detailed, process-based, mechanistic model for simulating SOM decomposition and its associated processes, based on Microbial Kinetics and Thermodynamics, called the MKT model. We formulated the sequential oxidation-reduction potential (ORP) and chemical reactions undergoing at the soil-water zone using dual Michaelis-Menten kinetics. Soil environmental variables, as required in the MKT model, are simulated using one of the most widely used watershed-scale models - the soil water assessment tool (SWAT). The MKT model was calibrated and validated using field-scale data of soil temperature, soil moisture, and NO emissions from three locations in the province of Saskatchewan, Canada. The model evaluation statistics show good performance of the MKT model for daily soil NO simulations. The results show that the proposed MKT model can perform better than the more widely used process-based and SWAT-based models for soil NO simulations. This is because the multiple processes of microbial activities and environmental constraints, which govern the availability of substrates to enzymes were explicitly represented. Most importantly, the MKT model represents a step forward from conceptual carbon pools at varying rates.
This article was published in the following journal.
Name: Environmental pollution (Barking, Essex : 1987)
Compared to pyrolysis biochar (PBC), gasification biochar (GBC) differs in both composition and surface functionalities due to the use of an oxidizing purging gas. This work compares the effect of usi...
The objectives of this research were to quantify the impact of organic matter content, soil pH and moisture content on the dissolution rate and solubility of copper oxide nanoparticles (CuO NPs) in so...
Sedimentary soil was selected as the original sample (SOS). The adsorption fractions were obtained by the removal of dissolved organic matter (SRDOM), removal of minerals (SRM), removal of free fat (S...
In the Arctic, climate changes contribute to enhanced mobilization of organic matter in streams. Microbial extracellular enzymes are important mediators of stream organic matter processing, but limite...
Swine waste is a reservoir of microbial pollutants, including pathogens, antibiotic resistance genes (ARGs) and antibiotic resistant bacteria (ARB); therefore, soil fertilized with swine waste is an e...
Trace elements, bioactive secondary metabolites and vitamins are among the most important quality parameters in plants. Yet, very little information is available on their content, bioavail...
To determine if the types and amount of bacteria or other germs change over time after the routine procedure of blockage of tear drainage duct in the treatment of dry eye condition or othe...
The study aims to evaluate the hypothesized benefits of a systematic organic diet for children, over those of a conventional diet. The specific objectives of this study are to: i) Demonstr...
In Quebec, thousands of workers are concomitantly exposed to heat and chemical compounds. Exposure to heat induces physiological responses that help maintaining a stable body temperature. ...
Introduction: Neuromotor losses are those that most affect the functionality of the elderly person. One of the preventive measures is the habit of practicing exercises regularly. Objective...
The inanimate matter of Earth, the structures and properties of this matter, and the processes that affect it.
A process of waste disposal involving the conversion of green waste (i.e. leaves, organic matter, food waste, manure) into soil-enhancing matter.
The metaphysical doctrine that the functions and processes of life are due to a vital principle distinct from physicochemical forces and that the laws of physics and chemistry alone cannot explain life functions and processes. Vitalism is opposed to mechanistic materialism. The belief was that matter was divided into two classes based on behavior with respect to heat: organic and inorganic. Inorganic material could be melted but could always be recovered by removing the heat source. Organic compounds changed form upon heating and could not be recovered by removing the heat source. The proposed explanation for the difference between organic and inorganic compounds was the Vitalism Theory, which stated that inorganic materials did not contain the "vital force" of life.
The thermodynamic interaction between a substance and WATER.
A mitosporic fungal genus occurring in soil or decaying plant matter. It is structurally similar to Penicillium.