The Impact of Somatotropin, Milking Frequency, and Photoperiod on Dairy Farm Nutrient Flows

Three technologies that increase milk production per cow and that are available to dairy producers are bovine somatotropin, three times daily milking, and extended daily photoperiod. Dairy herds fed according to National Research Council requirements were simulated to predict the impact of these tec...

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Veröffentlicht in:	Journal of dairy science 2000-05, Vol.83 (5), p.968-976
Hauptverfasser:	Dunlap, T. F, Kohn, R. A, Dahl, G. E, Varner, M, Erdman, R. A
Format:	Artikel
Sprache:	eng
Schlagworte:	Animal Nutritional Physiological Phenomena Animals Cattle - physiology Dairying - methods Feces - chemistry Female Growth Hormone - administration & dosage Lactation Nitrogen - metabolism Photoperiod Pregnancy Time Factors
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