Concentrate mix with a low P content (no supplemented mono-sodium phosphate) or a high P content (supplemented 11.9 g mono-sodium phosphate/kg DM; Table 1) of
dietary P was pre-made. The concentrate mix with medium P was obtained by mixing 50% of concentrate premix
with low P content and 50% of concentrate premix with
high P content, thus containing 6.0 g mono-sodium phosphate/kg DM. The rations were fed as TMR and the dry
period rations were lactation rations diluted with barley
straw (Table 2).