声明
Chapter 1 General introduction
1.1Study on cow dung and its current trends
1.2 Humic substances and humification
1.3 Study on soil organic matter and soil humic substances
1.4 Methods for analysis the humic substances
1.5 The background of this research
1.6 Objectives of this study and its significance
Chapter 2 Detection of tyrosine, metals and nutrients in cow dung: The environmental significance in soil and water environments
Abstract
2.1 Introduction
2.2 Materials and methods
2.2.1 Materials
2.2.2 Analytical procedures
2.2.3 PARAFAC modelling
2.3 Results and discussions
2.3.1 Detection of tyrosine in the cow dung and its environmental significance
2.3.2 Variation in pH, EC, trace metals and nutrients in cow dung
2.4 Conclusions
Chapter 3 Optical and molecular-level changes in the dissolved organic matter in cow dung under sunlight and dark incubation: Humification facts and mechanisms
Abstract
3.1 Introduction
3.2 Materials and methods
3.2.1.Materials
3.2.2 Experimental design
3.2.3 Analytical procedures
3.3 Results and discussion
3.3.1Changes in the fluorescent substances during photo and microbial effect identified by EEM-PARAFAC modelling
3.3.2 Functional groups changes of cow dung during photo and microbial experiments by FTIR analysis
3.3.3 Variation in pH, EC, and nutrients in experimental cow dung samples
3.3.4 Conceptual model for humification mechanisms
3.4 Conclusions
Chapter 4 Drying effects on soil dissolved organic matter in Tianjin: Optical and chemical spectroscopic evidences
Abstract
4.1 Introduction
4.2Materials and methods
4.2.1. Materials
4.2.2 Analytical procedures
4.3 Results and discussion
4.3.1.pH and electric conductivity of different types of soil
4.3.2. Fluorescent components identified by using EEM-PARAFAC modelling
4.3.3 Characteristic variation in elemental analysis in different types of soil
4.3.4 Characteristic differences of functional groups on soil DOM by using FTIR
4.4 Conclusions
Chapter 5 Summary
5.1 Conclusions
5.2 Limitation and future study
参考文献
致谢
