The author is very grateful to the Swedish International Development Agency /Department for Research Cooperation with Developing Countries (SIDA/SAREC) for funding this thesis research and the scholarship for the MSc. degree. Special appreciation is extended to the Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences for organizing and administering the MSc. programme “Tropical Livestock Systems”.
I would like to express deeply in my heart appreciation to my supervisor Prof. Dr. Metha Wanapat, the Director of the Tropical Feed Resources Research and Development Center (TROFREC), Department of Animal Science, Faculty of agriculture, Khon Kaen University for his encouragement, invaluable suggestions, guiding of the experiments, corrections and helped in bringing this thesis to full completion. I would like to thank all staffs of the TROFREC, Ph.D. and MSc. students under supervision of Prof. Dr. Metha Wanapat for their assistance during the experimental period and sample analysis.
I would like to thank you most sincerely Prof. Dr. Luu Trong Hieu, former Regional Course Coordinator, Dr. Ngo Van Man, Regional Course Coordinator, Mr. Nguyen Van Cong, Regional Administrative Officer and all of his staff for the warm welcome and the hospitality accorded me, and for all the assistance, making everything possible and convenient throughout the course.