Effect of selenium supplementation from various dietary sources on the antioxidant and selenium status of dairy cows and trace element status in dairy herds [Elektronische Ressource] / von Salman Saeed

Effect of Selenium Supplementation from Various Dietary Sources on the Antioxidant and Selenium Status of Dairy Cows and Trace Element Status in Dairy Herds D i s s e r t a t i o n zur Erlangung des akademischen Grades doctor rerum agriculturarum (Dr. rer. agr.) eingereicht an der Landwirtschaftlich-Gärtnerischen Fakultät der Humboldt-Universität zu Berlin von Salman Saeed, M.Sc (Hons.) Animal Nutrition aus Pakistan (geboren am 05.11.1974, Lahore) Präsident der Humboldt-Universität zu Berlin Prof. Dr. Dr. h.c. Christoph Markschies Dekan der Landwirtschaftlich-Gärtnerischen Fakultät Prof. Dr. Dr. h.c. Otto Kaufmann Gutachter: 1. PD Dr. Helmut Schafft 2. Prof. Dr. Jürgen Zentek Tag der mündlichen Prüfung: 08. 03. 2010 2 In the sweet memories of my loving brother Abul’Aala Sultan Saeed (May Allah shower His blessings upon him) who always inspired me towards higher ideals in life 3ACKNOWLEDGEMENTAll praises be to Allah Almighty who bestowed upon me His uncountable and immeasurable blessings. And peace be upon His noble messengers, the last of whom was Prophet Muhammad (SAW), who brought the light of knowledge and wisdom to the mankind. Firstly, I am grateful to Dr. Claudia Kijora and Prof. Dr. Ortwin Simon, Director of the Institute of Animal Nutrition FU, for their kind guidance towards my acceptance as PhD student. I am heartily thankful to my supervisor, Prof. Dr.