No description available.

No description available.

Graduation date: 1998

This study evaluated the effects of dietary starch on productive and reproduction parameters of postpartum dairy cows. Three diets were fed, with increasing starch levels from calving until 70 days in milk. Treatment had no effect on dry matter intake, energy balance, specific metabolic hormones and metabolites, milk yield, or milk components with the exception that cows fed the low starch diet had higher levels of milk urea nitrogen. Cows fed the high starch tended to lose less body condition, had a shorter interval from calving to first ovulation, and a higher incidence of double first ovulations. There were no treatment effects on ovarian dynamics, luteinizing hormone, progesterone or estradiol concentrations. Number of cows confirmed pregnant 30 d after first insemination did not differ between treatments. Increasing dietary starch decreased the interval from calving to first ovulation, but had no impact on productivity and metabolic status of the postpartum cow. / Animal Science

Thesis (Ph. D.)--University of Hong Kong, 2008. / Also available in print.

Thesis (doctoral)--Lund University, 1994. / Added t.p. with thesis statement inserted.

Thesis (PH. D.)--Columbia University, 1944. / Reproduced from type-written copy. Vita. eContent provider-neutral record in process. Description based on print version record. Bibliography: p. 31-32.

Thesis (Ph. D.)--Columbia University, 1925. / Vita. Bibliography: p. 25-27.

Thesis (Ph. D.)--Columbia University, 1941. / Reproduced from type-written copy. Vita. Includes bibliographical references (p. 57-59).

Thesis (Ph. D.)--Columbia University, 1926. / Vita. Bibliography: p. [31].