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Table of contents
ABSTRACT
THESIS OUTLINE AND OBJECTIVE
I – REVIEW PART
I.1 Hevea brasiliensis and trunk phloem necrosis
I.1.1 H. brasiliensis as economically important tree
I.1.2 Trunk phloem necrosis disease
I.2 Soil quality
I.2.1 Soil quality components
I.2.2 Soil quality improvement
I.3 The role of soil macrofauna
I.4. Soil microorganisms
I.4.1. Importance of soil microorganisms
I.4.2. Analysis of soil microbial community structure
I.5. Enzyme activity in soil
I.6 Soil ecological stress
II. MATERIALS AND METHODS
II.1 Experimental site description
II.2 Macrofauna sampling
II.3 Soil sampling and preparation
II.4 Soil analysis
II.5 Soil enzyme activity
II.6 Soil fungal community
III.6.1 Soil fungal enumeration and isolation
III.6.2 Identification of culturable fungi
III.6.3 Genetic diversity of soil fungi
II.7 Analysis of plant growth
II.8 Statistical analysis
III – RESULTS
CHAPTER III.1 TPN AND SOIL ENVIRONMENT
Abstract
III.1.1 INTRODUCTION
III.1.2 EXPERIMENTAL DESIGN
III.1.3 RELATIONSHIP BETWEEN TPN ANDDIFFERENT SOIL PROPERTIES
III.1.4 TPN AND SOIL MACOFAUNA
III.1.4.1 Macrofauna density
III.1.4.2 Macrofauna diversity
III.1.5 TPN AND SOIL ENZYME ACTIVITY
III.1.5.1 Rainy season
III.1.5.2 Dry season
III.1.6 TPN AND FUNGAL COMMUNITY
III.1.7 DISCUSSION
III.1.7.1 TPN and soil properties
III.1.7.2 Impact of trunk phloem necrosis on macrofauna community
III.1.7.3 Relationship between trunk phloem necrosis and soil enzyme activity
III.1.7.4 The influence of trunk phloem necrosis on soil microbial community
III.1.8 CONCLUSION
CHAPTER III.2 IMPACT OF SOIL ORGANIC AMENDMENTS ON SOIL BIOLOGICAL ACTIVITIES
Abstract
III.2.1 INTRODUCTION
III.2.2 EXPERIMENTAL DESIGN
III.2.3 IMPACT OF SOIL AMENDMENTS ON PLANT GROWTH
III.2.4 IMPACT OF SOIL ORGANIC AMENDMENTS ON SOIL PROPERTIES
III.2.5 IMPACT OF SOIL ORGANIC AMENDMENTS ON MACROFAUNA COMMUNITY
III.2.5.1 Macrofauna density
III.2.5.2 Macrofauna diversity
III.2.6 IMPACT OF SOIL ORGANIC AMENDMENTS ON SOIL ENZYME
III.2.7 DISCUSSION
III.2.7.1 Soil quality and plant productivity
III.2.7.2 Impact of soil amendment on macrofauna community
III.2.7.3 Impact of soil organic amendment on soil enzyme activities
III.2.8 CONCLUSION
GENERAL CONCLUSION AND FUTURE PERSPECTIVES
REFERENCES
