声明
摘要
Abstract
CONTENTS
List of Figures and Tables
Abbreviations
CHAPTER 1 Literature Review
1.1 General Introduction
1.1.1 Brief introduction of Pekin duck
1.1.2 Essential amino acids
1.2 Essential Amino acids and feed intake
1.2.1 Essential amino acids and intestinal physiology
1.2.2 Essential amino acids and immunity
1.2.3 Essential amino acids and Meat Quality
1.2.4 Threonine
1.3 Importance of Threonine in Growth and Development of Animal Systems
1.3.1 Nutrient requirements of Pekin Ducks
1.3.2 Threonine Requirements in Poultry
1.3.3 Threonine requirements of Broilers
1.3.4 Threonine Requirements of Turkeys
1.3.5 Threonine Requirements of Pekin ducks
1.4 Threonine and immune function
1.5 Summary
1.6 Objectives of the study
CHAPTER 2 Effect of Dietary Threonine and crude Protein on Growth Performance and Carcase traits in 21 D old Pekin ducks
2.1 Abstract
2.2 Introduction
2.3 Material and methods
2.4 Dietary treatments and Animal Management
2.5 Growth performance and carcase traits Measrements
2.6 Chemical Analysis
2.7 Statistical Analysis
2.8 RESULTS
2.8.1 Growth Performance
2.8.2 Carcass traits
2.8.3 Plasma indices
2.9 Discussion
2.9.1 Growth performance
2.9.2 Carcass traits
2.9.3 Plasma Indices
2.10 Conclusion
CHAPTER3 Effects of Dietary Threonine on Growth Performance and Carcase Traits in 15-35 D old Pekin ducks
3.1 Abstract
3.2 Introduction
3.3 Material And Methods
3.3.1 Birds and Housing
3.3.2 Experimental diets and feed analysis
3.3.3 Growth performance and carcase traits Measrements
3.3.4 Chemical Analysis
3.3.5 Statistical Analysis
3.4 Results
3.4.1 Growth Performance
3.4.2 Carcass traits
3.4.3 Plasma indices
3.5 Discussion
3.5.1 Growth performance
3.5.2 Carcass traits
3.6 Conclusion
CHAPTER 4 General Discussion And Conclusion
4.1 General DISCUSSION
4.2 General Conclusion
4.2.1 4.2 New Findings of the present Study
4.2.2 4.3 Future Directions for further study
REFERENCES
ACKNOWLEDGEMENTS
CV