生物质炭对土壤物理性质、温室气体排放和土壤可提取态重金属含量的影响：整合分析
发布时间：2024-02-26 03:49
由于人口的激增带来了增加粮食产量这一挑战,而粮食生产的增加则导致了土壤退化和大气温室气体浓度增加。土地退化则具体表现为:农业和城市土壤的重金属污染、有机质损失而引起的土壤结构变差、土壤紧实度增加、土壤肥力流失而导致农业生产力下降。由于生物质炭具有固碳减排和提高土壤肥力的作用,因而作为一种改良土壤的方法被越来越提倡。同时,由于其能修复土壤重金属污染、增加土壤微生物量和微生物群落,因而也被大力提倡。但是,在全球范围内施用生物质炭对土壤物理的作用没有一个综合性的评价,来建议改善土壤质量。同时,也缺少研究来量化生物质炭在大尺度下的土壤试验和其性质对温室气体减排的影响,并得出生物质炭在全球农业上实施的强有力结论。实验目的:1、定量研究生物质炭对土壤温室气体排放、重金属和选定的土壤物理性质的影响;2、明确生物质炭对土壤物理性质、温室气体排放和重金属影响的主要因素。为了实现我们的目的,我们采用整合分析通过比较研究结果来掲示共同的反应趋势。这项研究分为四个部分:1、我们将在2015年10月之前发布的文章其中可用的数据用以整合分析,并量化生物质炭对选定的土壤物理性质的影响。文献数据的范围包括:原来、裂解...
【文章页数】：125 页
【学位级别】：博士
【文章目录】：
ABSTRACT
摘要
LIST OF ABBREVIATIONS AND SYMBOLS
CHAPTER 1 INTRODUCTION
1.1 BACKGROUND INFORMATION
1.1.1 Biochar effects on soil physical properties
1.1.2 Biochar effects on greenhouse gasses emissions from soils
1.1.3 Biochar effects on extractable heavy metals in soils
1.2 META-ANALYSIS
1.3 STATEMENT OF THE PROBLEM
1.4 OBJECTIVES
1.5 HYPOTHESES
1.6 RESEARCH FRAMEWORK
CHAPTER 2 QUANTIFICATION OF BIOCHAR EFFECTS ON SOIL PHYSICALPROPERTIES
2.1 INTRODUCTION
2.2 MATERIALS AND METHODS
2.2.1 Data collection
2.2.2 Data categorization and treatment
2.2.3 Meta-analysis
2.2.4 Data treatment and statistics
2.3 RESULTS
2.3.1 Change in soil bulk density with biochar
2.3.2 Change in soil aggregate stability (MWD) with biochar
2.3.3 Change in soil porosity with biochar
2.3.4 Change in available water capacity (AWC) with biochar
2.3.5 Change in saturated hydraulic conductivity (Ksat)
2.4 DISCUSSION
2.4.1 Biochar effects on soil hydrological properties
2.4.2 Effects changes with the biochar conditions
2.4.3 Effects changes with soil conditions
2.5 CONCLUSIONS
CHAPTER 3 BIOCHAR EFFECTS ON GREENHOUSE GAS EMISSION FROMSOIL
3.1 INTRODUCTION
3.2 METHODS
3.2.1 Data sources and compilation
3.2.2 Data categorization and treatment
3.2.3 Statistical analysis
3.3 RESULTS
3.3.1 CO2 Emission
3.3.2 CH4 Emission
3.3.3 N2O Emission
3.3.4 Greenhouse gas intensity (GHGI)
3.4 DISCUSSION
3.4.1 Biochar effect on greenhouse emission: Biochar conditions versus soilconditions
3.4.2 Biochar effects on greenhouse emission: Experimental conditions
3.4.3 Biochar effect on greenhouse gas emission: Soil conditions
3.4.4 Biochar effects on GHGI
3.5 CONCLUSIONS
CHAPTER 4 BIOCHAR EFFECTS ON EXTRACTABLE HEAVY METALS INSOIL
4.1 INTRODUCTION
4.2 METHODS
4.3 RESULTS
4.3.1 Extractable heavy metals
4.3.2 Cationic toxic heavy metals
4.3.3 Cationic micronutrients
4.3.4 Anionic toxic metals
4.4 DISCUSSION
4.4.1 Biochar effect on extractable heavy metal:cationic versus anionic
4.4.2 Biochar effect on extractable heavy metal:application rates versus soilcondition
4.4.3 Biochar effect on extractable heavy metal:Feedstock and pyrolysiscondition
4.5 CONCLUSIONS
CHAPTER 5 OVERALL SYNTHESIS AND PERSPECTIVES
5.1 INTRODUCTION
5.2 COMPARATIVE QUANTIFICATION OF BIOCHAR EFFECTS BASED ON CHANGES INSOIL HYDROLOGICAL FUNCTIONS AND SOIL ENVIRONMENTAL REMEDIATIONFUNCTIONS
5.3 COMPARATIVE QUANTIFICATION OF BIOCHAR EFFECTS BETWEEN THE DIFFERENTBIOCHAR PROPERTIES
5.4 INNOVATIONS
5.5 LIMITATIONS AND RESEARCH GAPS
REFERENCES
APPENDICES
PUBLICATIONS
ACKNOWLEDGEMENT
本文编号：3911286
【文章页数】：125 页
【学位级别】：博士
【文章目录】：
ABSTRACT
摘要
LIST OF ABBREVIATIONS AND SYMBOLS
CHAPTER 1 INTRODUCTION
1.1 BACKGROUND INFORMATION
1.1.1 Biochar effects on soil physical properties
1.1.2 Biochar effects on greenhouse gasses emissions from soils
1.1.3 Biochar effects on extractable heavy metals in soils
1.2 META-ANALYSIS
1.3 STATEMENT OF THE PROBLEM
1.4 OBJECTIVES
1.5 HYPOTHESES
1.6 RESEARCH FRAMEWORK
CHAPTER 2 QUANTIFICATION OF BIOCHAR EFFECTS ON SOIL PHYSICALPROPERTIES
2.1 INTRODUCTION
2.2 MATERIALS AND METHODS
2.2.1 Data collection
2.2.2 Data categorization and treatment
2.2.3 Meta-analysis
2.2.4 Data treatment and statistics
2.3 RESULTS
2.3.1 Change in soil bulk density with biochar
2.3.2 Change in soil aggregate stability (MWD) with biochar
2.3.3 Change in soil porosity with biochar
2.3.4 Change in available water capacity (AWC) with biochar
2.3.5 Change in saturated hydraulic conductivity (Ksat)
2.4 DISCUSSION
2.4.1 Biochar effects on soil hydrological properties
2.4.2 Effects changes with the biochar conditions
2.4.3 Effects changes with soil conditions
2.5 CONCLUSIONS
CHAPTER 3 BIOCHAR EFFECTS ON GREENHOUSE GAS EMISSION FROMSOIL
3.1 INTRODUCTION
3.2 METHODS
3.2.1 Data sources and compilation
3.2.2 Data categorization and treatment
3.2.3 Statistical analysis
3.3 RESULTS
3.3.1 CO2 Emission
3.3.2 CH4 Emission
3.3.3 N2O Emission
3.3.4 Greenhouse gas intensity (GHGI)
3.4 DISCUSSION
3.4.1 Biochar effect on greenhouse emission: Biochar conditions versus soilconditions
3.4.2 Biochar effects on greenhouse emission: Experimental conditions
3.4.3 Biochar effect on greenhouse gas emission: Soil conditions
3.4.4 Biochar effects on GHGI
3.5 CONCLUSIONS
CHAPTER 4 BIOCHAR EFFECTS ON EXTRACTABLE HEAVY METALS INSOIL
4.1 INTRODUCTION
4.2 METHODS
4.3 RESULTS
4.3.1 Extractable heavy metals
4.3.2 Cationic toxic heavy metals
4.3.3 Cationic micronutrients
4.3.4 Anionic toxic metals
4.4 DISCUSSION
4.4.1 Biochar effect on extractable heavy metal:cationic versus anionic
4.4.2 Biochar effect on extractable heavy metal:application rates versus soilcondition
4.4.3 Biochar effect on extractable heavy metal:Feedstock and pyrolysiscondition
4.5 CONCLUSIONS
CHAPTER 5 OVERALL SYNTHESIS AND PERSPECTIVES
5.1 INTRODUCTION
5.2 COMPARATIVE QUANTIFICATION OF BIOCHAR EFFECTS BASED ON CHANGES INSOIL HYDROLOGICAL FUNCTIONS AND SOIL ENVIRONMENTAL REMEDIATIONFUNCTIONS
5.3 COMPARATIVE QUANTIFICATION OF BIOCHAR EFFECTS BETWEEN THE DIFFERENTBIOCHAR PROPERTIES
5.4 INNOVATIONS
5.5 LIMITATIONS AND RESEARCH GAPS
REFERENCES
APPENDICES
PUBLICATIONS
ACKNOWLEDGEMENT
本文编号：3911286
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