PROTECTED AMINO ACIDS AND VARIOUS PROTEIN SOURSES IN HIGH YIELDING DAIRY COWS FEEDING
Journal Title: Zeszyty Naukowe Uniwersytetu Przyrodniczego we Wrocławiu, Biologia i Hodowla Zwierząt - Year 2012, Vol 586, Issue 0
Abstract
In presented review paper current rules of protein nutrition standardisation for dairy cows are presented with explanation of the term protein truly digestible in the small intestine (French PDI, German nXP and American metabolic protein). The role of both rumen degraded (RDP) and undegraded protein – "by-pass" protein (RUP) is discussed. There are presented available experimental data concerning the possibility of estimation methods to meet dairy cows requirement on indispensable amino acids on the base of amino acids content in tissues internal secretions ( mainly in blood serum) as well as in duodenal content (so called amino acids flows). In the following part of the presented paper the aim and rules of increasing RUP pool as well as controlling of its quality by introducing to the ration protected proteins and protected amino acids – lysine and methionine.
Authors and Affiliations
Rafał Bodarski, Jerzy Preś, Agnieszka Szyszkowska, Iga Sobczyk, Marian Kuczaj
Keywords
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PROTECTED AMINO ACIDS AND VARIOUS PROTEIN SOURSES IN HIGH YIELDING DAIRY COWS FEEDING
In presented review paper current rules of protein nutrition standardisation for dairy cows are presented with explanation of the term protein truly digestible in the small intestine (French PDI, German nXP and American...