Evaluating estimates of phosphorus maintenance requirement of lactating Holstein cows with different dry matter intakes

The objective was to evaluate estimates of the inevitable fecal loss component of the P maintenance requirement of lactating Holstein cows consuming differing amounts of a low-P diet. The maintenance requirement for P is the sum of inevitable (e.g., unavoidable) endogenous fecal P plus endogenous ur...

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Veröffentlicht in:	Journal of dairy science 2009-02, Vol.92 (2), p.708-719
Hauptverfasser:	Myers, Z.H., Beede, D.K.
Format:	Artikel
Sprache:	eng
Schlagworte:	ad libitum feeding Animal productions Animals Biological and medical sciences Cattle - metabolism Cattle - physiology dairy cows Diet - veterinary dietary minerals dry matter intake Eating - physiology equations estimation feces Feces - chemistry Female Food industries Fundamental and applied biological sciences. Psychology Holstein lactating dairy cow lactation Lactation - physiology maintenance requirement mathematical models Milk - chemistry Milk and cheese industries. Ice creams milk yield nutrient balance nutrient requirements phosphorus Phosphorus - metabolism phosphorus requirement Phosphorus, Dietary - administration & dosage Phosphorus, Dietary - metabolism Terrestrial animal productions urine Urine - chemistry Vertebrates
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