The aim of this trial is to evaluate the effect of a diet based on silage of Italian Ryegrass on the yield and quality of buffalo milk. The trial was carried out in a commercial farm located in South of Italy, on 40 animals divided in two groups homogeneous for parity, lactation stage and milk yield. Silage group (n = 20) received a total mixed ration based on silage of Italian Ryegrass, hay and concentrates, whereas hay group (n = 20) was fed by hay and concentrates. Both diets contained 0.92 Milk Forage Units/kg d.m. and 15.5% crude protein/d.m. Milk recordings were monthly carried out during morning milking in order to evaluate the milk yield, pH, fat, protein, somatic cell count and coagulating properties. Statistical analysis was performed using a factorial model. A higher milk yield was observed in silage group respect to hay group in the total period of the trial (5.7 vs. 5.1 kg; P ≤ 0.01), while no significant differences were recorded in fat and protein content (7.78 vs. 7.53% and 4.33 vs. 4.35%, respectively in silage and hay group). Also pH and somatic cell count were not different between the groups. The milk from silage group showed better coagulating properties than those of the other group: the clotting time decreased (18.3 vs. 19.4 min; P≤0.01) and the curd firmness increased (45.2 vs. 39.6 mm e 49.9 vs. 45.2 mm; P ≤ 0,01). From the results of this trial it comes out that the diet based on silage of Italian Ryegrass affects positively the yield of buffalo milk and its coagulating properties.

Effetto di una dieta a base di insilato di erba sulla qualità del latte di bufala.

NEGLIA, GIANLUCA;
2009

Abstract

The aim of this trial is to evaluate the effect of a diet based on silage of Italian Ryegrass on the yield and quality of buffalo milk. The trial was carried out in a commercial farm located in South of Italy, on 40 animals divided in two groups homogeneous for parity, lactation stage and milk yield. Silage group (n = 20) received a total mixed ration based on silage of Italian Ryegrass, hay and concentrates, whereas hay group (n = 20) was fed by hay and concentrates. Both diets contained 0.92 Milk Forage Units/kg d.m. and 15.5% crude protein/d.m. Milk recordings were monthly carried out during morning milking in order to evaluate the milk yield, pH, fat, protein, somatic cell count and coagulating properties. Statistical analysis was performed using a factorial model. A higher milk yield was observed in silage group respect to hay group in the total period of the trial (5.7 vs. 5.1 kg; P ≤ 0.01), while no significant differences were recorded in fat and protein content (7.78 vs. 7.53% and 4.33 vs. 4.35%, respectively in silage and hay group). Also pH and somatic cell count were not different between the groups. The milk from silage group showed better coagulating properties than those of the other group: the clotting time decreased (18.3 vs. 19.4 min; P≤0.01) and the curd firmness increased (45.2 vs. 39.6 mm e 49.9 vs. 45.2 mm; P ≤ 0,01). From the results of this trial it comes out that the diet based on silage of Italian Ryegrass affects positively the yield of buffalo milk and its coagulating properties.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/366491
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