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The potential of passive infrared thermography for the detection of microbial hot spots and hot moments at high spatial and temporal resolution / vorgelegt von Melanie Katharina Schwarz. Wuppertal, Juni 2021
Content
List of Figures
List of Tables
Nomenclature
Abstract
Kurzfassung
Introduction
General Motivation
State of the Art
How infrared thermography works and what exactly is measured
What processes generate heat in soils
How soil properties and ambient conditions affect the measured surface temperature
Open Questions, Aims and Outline
Research Study I
Introduction
Material and Methods
Soil sampling
Active and passive infrared thermography
Determination of soil moisture using active infrared thermography
Determination of microbial activity using passive infrared thermography
Software
Results and discussion
Determination of soil moisture using active infrared thermography (A)
Soil moisture calibration
Spatial surface moisture distribution
Spatial and temporal variability of surface moisture contents
Determination of soil microbial activity using passive infrared thermography (P)
Temporal course of mean surface temperatures
Spatial and temporal variability of surface temperatures
Combination of surface temperature, soil moisture, and surface structure
Conclusions
Research Study II
Introduction
Material and Methods
Soil samples
Analytical techniques
Infrared thermography
Respirometry
Incubation experiments
Incubation experiments for thermal imaging
Effect of glucose application
Glucose application methods
Influence of ambient incubation condition
Data preprocessing
Respirometry incubation experiments
The potential of hot movement identification on soil surface using IRT
Software
Results and discussion
Incubation experiments for thermal imaging
Effect of glucose application
Glucose application methods
Influence of ambient incubation conditions
Data processing
Respirometry incubation experiments
The potential of hot movements identification on soil surface using IRT
Conclusions
Research Study III
Introduction
Material and methods
Soil sampling
Analytical techniques
Determination of microbial activity using passive IRT
Determination of soil surface moisture and structure using active IRT
Determination of surface -glucosidase using zymography
SOC distribution accessed using surface color parameters
Soil sample incubation setup and procedure
Georeferencing and scaling of the data
Mathematical quantification and delineation of hot moments and hot spots
Temporal delimitations characterization of hot moments
Spatial relationship and characterization of hot spots
Analysis of soil surface temperature and further soil properties
Relating soil properties pixelwise to surface temperature
Cluster analysis of hot moments and hot spots
Results and discussion
Mathematical quantification and delineation of hot moments and hot spots
Temporal delimitations characterization of hot moments
Spatial relationship and characterization of hot spots
Analysis of soil surface temperature and further soil properties
Relating soil properties pixelwise to surface temperature
Cluster analysis of hot moments and hot spots
Conclusions
Synopsis
Concluding Discussion
Outlook
Summary
Bibliography
Appendix