Resum de dos articles sobre el contingut proteic de la ració a l’inici de la lactació. JDSci 1998.

Diet choice by dairy cows. 1. Selection of feed protein content during the first half of lactation. B.J. Tolkamp, R.J Dewhurst, N.C. Friggens, I. Kyriazakis, R.F Veerkamp, J.D.Oldham. United Kingdom. 1998 J Dairy Sci 81:2657‐2669
Diet choice by dairy cows. 2. Selection for metabolizable protein or for ruminal degradable protein?. B.J. Tolkamp, I. Kyriazakis, J.D.Oldham, M. Lewis, R.J Dewhurst, J.r. Newbold. United Kingdom. 1998 J Dairy Sci 81:2670‐2680.