Table 1.

Mean values of the chemical composition of the diet administered to 216 cows randomly selected from 20 dairy herds.

Parameters	Mean ± SD
Crude protein (g/Kg)	15.21 ± 1.06
Ethereal extract (%)	4.52 ± 0.43
Ash (%)	7.48 ± 0.85
NDF (%)	35.30 ± 1.83
NSC (%)	37.46 ± 2.47
Digestible dry matter (%ss)	65.48 ± 1.85
ADF (acid detergent fiber)	20.58 ± 1.66
Starch (g/Kg)	22.87 ± 1.97
Calcium (mg/Kg)	1.00 ± 0.05
Phosphorus (mg/Kg)	0.45 ± 0.01
Magnesium (mg/Kg)	0.33 ± 0.02
Sodium (mg/Kg)	0.58 ± 0.05
Potassium (mg/Kg)	1.45 ± 0.10
Chlorine (mg/Kg)	0.32 ± 0.09
Anions/cations (meq/100 gr)	41.78 ± 2.09
NDF/NSC	0.94 ± 0.10
NSC/NDF	1.06 ± 0.11
NDF/proteins	2.33 ± 0.22
Starch/proteins	1.50 ± 0.14