Effect of the concentrate source on milk yield, milk composition and feeding behaviour of grazing sheep during summer season
2007
Annicchiarico, G.; Caternolo, G.; Taibi, L., Istituto Sperimentale per la Zootecnia, Foggia (Italy) | Claps, S., Istituto Sperimentale per la Zootecnia, Bella Scalo (PZ), (Italy) | Marino, R., Università degli studi di Foggia (Italy). Facoltà di Agraria, Dipartimento PRIME | Terzano, G., Istituto Sperimentale per la Zootecnia, Monterotondo Sc. Rome (Italy)
The trial was carried out on 40 Sardinian grazing sheep divided into four groups of 10 each, during the summer season. The animals of indoor group (S) were fed with vetch-oats hay and commercial concentrate; group (P) was fed only at pasture; group (PR) was fed with pasture and highly degradable concentrate (barley grain and chick-pea); group (PL) was fed with pasture and lowly degradable concentrate (maize and broad bean). Weekly milk yield, body weight and body condition score (BCS) were recorded and milk and blood samples were collected. The sheep behaviour was monitored with scan sampling method. The grazing behaviour was different between groups; P group spent longer feeding on pasture (80 per cent), expressed as percentage of total observation time, than the PR and PL groups. Milk yield of PL group was higher than P and PR groups, while no significant differences were observed between PL group and S group. Milk protein, fat, lactose and curd firmness were affected by the nutritional treatments
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