In their first 150 days of lactation, nine Ragusana jennets were investigated at the ‘Istituto Sperimentale Zootecnico per laSicilia’ (ISZS) in Palermo, to study the effects of different milking typologies on milk production. The jennets were kept in apaddock and were fed hay ad libitum and concentrate (3.5 kg jennet/day). From post-foaling day 21, every 3 weeks individualmilk amounts were recorded, and individual milk samples were collected and analyzed for the main qualitative parameters.The compared theses were: two daily milking times with 6- and 3-h intervals; and two, three and eight daily milking times with3-h interval. The jennets were manually milked. The foals were separated from the jennets at 0800 h, and after the last milkingthe foals were housed with the jennets. During the day with eight milkings, the milk yield from the jennets was fed to theirrespective foals, through bottles. The 6-h milking interval produced more milk (119%) per session than the 3-h interval( P<0.01). The fat content per session, with the eight-time milking frequency ( P<0.001), was greater than the others. Foreach milking typology, the lactation stage had a similar effect on almost all the considered variables. When observing theeight-milking times, the fat content (%) increased from 1100 to 0500 h ( P<0.001). The milk yield and the fat percentageproduced by two-, three- and eight-milking times were positively correlated.
|Numero di pagine||5|
|Stato di pubblicazione||Published - 2009|
All Science Journal Classification (ASJC) codes
- Animal Science and Zoology