| ABSTRACT | 第7-9页 |
| 摘要 | 第10-22页 |
| ABBREVIATIONS | 第22-23页 |
| LIST OF SYMBOLS | 第23-26页 |
| CHAPTER 1 INTRODUCTION | 第26-43页 |
| 1.1 VEGETABLE TRANSPLANTING IN DEVELOPING COUNTRIES | 第26-28页 |
| 1.2 PICK-UP END EFFECTOR RESEARCH FOR AUTOMATICTRANSPLANTERS | 第28-30页 |
| 1.2.1 Current level and trends in pick-up end-effector designs in China and other countries | 第29页 |
| 1.2.2 Key bottlenecks in the design of pick-up devices | 第29-30页 |
| 1.3 HISTORY OF X-RAY COMPUTED TOMOGRAPHY IN SOIL-PLANTRESEARCH | 第30-31页 |
| 1.4 PRINCIPLE AND GUIDELINES OF OPERATION OF CT IN SOILRESEARCH | 第31-33页 |
| 1.5 APPLYING CT FOR IMAGING SOIL-ROOT PHYSICAL AND BIOLOGICALPROCESSES | 第33-41页 |
| 1.5.1 Trends in using CT for soil-root investigations | 第33-36页 |
| 1.5.2 Root architecture imaging | 第36-38页 |
| 1.5.3 Soil compaction and structure deformations | 第38-39页 |
| 1.5.4 Soil-roots hydraulic interactions | 第39-40页 |
| 1.5.5 Soil-root biological processes | 第40-41页 |
| 1.6 SIGNIFICANCE AND OBJECTIVES OF THE STUDY | 第41-42页 |
| 1.7 MAIN CONTENT AND DISSERTATION ORGANIZATION | 第42-43页 |
| CHAPTER 2 COMBINING X-RAY COMPUTED TOMOGRAPHY ANDRELEVANT TECHNIQUES FOR ANALYZING SOIL-ROOT DYNAMICS-AN OVERVIEW | 第43-60页 |
| 2.1 INTRODUCTION | 第43-45页 |
| 2.2 APPLICATIONS OF CT AND OTHER TECHNIQUES IN SOIL AND ROOTSTUDIES | 第45-56页 |
| 2.2.1 Soil Hydraulic and Structural Dynamics | 第45-49页 |
| 2.2.2 Root network imaging | 第49-51页 |
| 2.2.3 Modeling and CT experimental work on root-soil interactions | 第51-54页 |
| 2.2.4 Detection of organic matter | 第54-56页 |
| 2.3 ADVANTAGES AND LIMITATION OF COUPLING CT WITH OTHERTECHNIQUES | 第56-57页 |
| 2.4 ADDITIONAL TRENDS AND OUTLOOK | 第57-60页 |
| CHAPTER 3 ASSESSMENT OF TOMATO SEEDLING SUBSTRATE-ROOTQUALITY USING X-RAY MICRO-COMPUTED TOMOGRAPHY | 第60-78页 |
| 3.1 INTRODUCTION | 第60-61页 |
| 3.2 MATERIALS AND METHODS | 第61-66页 |
| 3.2.1 Main instrument/facility used in the study | 第61-63页 |
| 3.2.2 Experimental procedure and data acquisition | 第63-66页 |
| 3.2.2.1 Sample preparation | 第63-65页 |
| 3.2.2.2. Substrate-root micro-CT scanning procedure | 第65页 |
| 3.2.2.3 Data Acquisition and analysis | 第65-66页 |
| 3.3 RESULTS AND DISCUSSION | 第66-76页 |
| 3.3.1 Ground data on tomato seedlings | 第66-68页 |
| 3.3.2 Three dimensional structure visualization and estimation of root feature analysis | 第68-73页 |
| 3.3.3 Porosity analysis | 第73-75页 |
| 3.3.4 Finite element analysis of substrate-roots | 第75-76页 |
| 3.4 SUMMARY | 第76-78页 |
| CHAPTER 4 SUBSTRATE-ROOT NUTRIENT ELEMENT ANALYSES ANDWATER APPLICATION EFFECT ON SEEDLING GROWTH | 第78-93页 |
| 4.1 INTRODUCTION | 第78页 |
| 4.2 MATERIALS AND METHODS | 第78-80页 |
| 4.2.1 Experiments | 第79-80页 |
| 4.2.1.1 Substrate-root nutrient assessment using SEM-EDS | 第79页 |
| 4.2.1.2 Plant growth | 第79-80页 |
| 4.2.2 Statistical Analysis | 第80页 |
| 4.3 RESULTS AND DISCUSSION | 第80-92页 |
| 4.3.1 SEM Structures and nutrient analyses | 第80-83页 |
| 4.3.2. Cluster analyses and correlation between nutrient elements | 第83-90页 |
| 4.3.3 Effect of three water applications on the growth and development of seedlings | 第90-92页 |
| 4.4 SUMMARY | 第92-93页 |
| CHAPTER 5 MODELING AND MECHANICAL PERFORMANCE OFSEEDLING SUBSTRATE-ROOTS | 第93-108页 |
| 5.1 INTRODUCTION | 第93页 |
| 5.2 MATERIALS AND METHODS | 第93-97页 |
| 5.3 MODEL SIMULATIONS | 第97-98页 |
| 5.4 EXPERIMENTS | 第98-99页 |
| 5.4.1 Experiment on root growth of tomato seedlings | 第98-99页 |
| 5.4.2 Compression experiments on tomato roots and substrates | 第99页 |
| 5.5 RESULTS AND DISCUSSION | 第99-107页 |
| 5.5.1 Mechanical Properties of Soil-roots | 第101-103页 |
| 5.5.2 Force-displacement analysis of seedling soil-roots | 第103-107页 |
| 5.6 SUMMARY | 第107-108页 |
| CHAPTER 6 INVESTIGATIONS INTO SEEDLING SUBSTRATE GRIPPINGFORCE DAMAGE | 第108-121页 |
| 6.1 INTRODUCTION | 第108-109页 |
| 6.2 FORCE GRIPPING DAMAGE EQUATION | 第109页 |
| 6.3 EXPERIMENTS | 第109-113页 |
| 6.3.1 Seedling growth conditions | 第109页 |
| 6.3.2 Force application on the seedling soil | 第109-112页 |
| 6.3.3 Laboratory experiments | 第112页 |
| 6.3.4 Damage investigation/inspection | 第112-113页 |
| 6.3.4.1 Statistical analysis | 第113页 |
| 6.4 RESULTS AND DISCUSSION | 第113-120页 |
| 6.4.1 Seedling soil damage imaging and morphometry under different force treatments | 第113-116页 |
| 6.4.2 Physical and mechanical properties of soil damage | 第116-120页 |
| 6.4.2.1 Damage ratio and structure model index of seedling soil | 第116-118页 |
| 6.4.2.2 Mechanical properties of the damage | 第118-120页 |
| 6.5 SUMMARY | 第120-121页 |
| CHAPTER 7 ANALYSES AND OPTIMIZATION OF PICK-UP SUCCESSRATIO IN TRANSPLANTING | 第121-135页 |
| 7.1 INTRODUCTION | 第121页 |
| 7.2 ANALYSIS OF PICK-UP DEVICE IN PICKING UP SEEDLINGS | 第121-125页 |
| 7.2.1 Pick-up trajectory and motion planning | 第121-125页 |
| 7.3 MODAL ANALYSIS | 第125-131页 |
| 7.3.1 Governing equations for the modal analysis of the pick-up end-effector | 第125-126页 |
| 7.3.2 Experimental and finite element simulation methods | 第126-128页 |
| 7.3.2.1 Vibration test on pick-up end effector | 第126-128页 |
| 7.3.3 Simulation by ANSYS Workbench | 第128-131页 |
| 7.4 CONSIDERATIONS FOR THE DESIGN OF PICK-UP ENDEFFECTORS | 第131-132页 |
| 7.4.1 Substrate type and pick-up relationship | 第131页 |
| 7.4.2 Root properties and pick-up relationship | 第131-132页 |
| 7.4.3 Damage and pick-up relationship | 第132页 |
| 7.5 OPTIMIZATION OF SUCCESS RATIO IN TRANSPLANTING SEEDLINGS | 第132-134页 |
| 7.6 SUMMARY | 第134-135页 |
| CHAPTER 8 GENERAL CONCLUSIONS, INNOVATION ANDRECOMMENDATIONS | 第135-171页 |
| 8.1 GENERAL CONCLUSIONS | 第135-136页 |
| 8.2 INNOVATIONS/NOVELTY | 第136-137页 |
| 8.3 RECOMMENDATIONS FOR FUTURE WORK | 第137-171页 |
| ACKNOWLEDGEMENT | 第171-173页 |
| PUBLICATIONS | 第173-174页 |
| Research projects | 第174页 |
