Effects of dietary urea levels on milk protein fractions of Holstein cows
Published:March 2, 2012
Summary
1. Introduction The interest in milk protein has risen in the last decades due to its nutritional (Meisel, 2004) and economical importance (Emmons et al., 2003). Higher true protein concentration in milk is desirable to attend the dairy industry demands (Emmons et al., 2003). Milk nitrogen fractions are composed of casein, whey proteins and non- rotein nitrogen (Depeters an...
In my opinion, it´s difficult to get the real meaning of the results provided without information about the production level obtained, since I don´t think it´s possible to study the fact that it would get the same response if the animal produces 10 lts of milk per day or if the production is 50 lts.
Best regards José Zorrilla Ríos, Universidad de Guadalajara Jalisco, México.