tailieunhanh - Báo cáo khoa học: "Housing, Feeding and Management of Calves and Replacement Heifers in Swedish Dairy Herds"

Tuyển tập các báo cáo nghiên cứu về bệnh thú y được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành thú y đề tài: Housing, Feeding and Management of Calves and Replacement Heifers in Swedish Dairy Herds. | Acta vet. scand. 2001 42 465-478. Housing Feeding and Management of Calves and Replacement Heifers in Swedish Dairy Herds By K. Pettersson C. Svensson and P Liberg Department of Animal Environment Health Faculty of Veterinary Medicine Swedish University of Agricultural Sciences Skara Sweden. Pettersson K Svensson C Liberg P Housing feeding and management of calves and Replacement heifers in Swedish dairy herds. Acta vet. scand. 2001 42 465478. - A questionnaire was sent to 1500 randomly selected dairy herds in Sweden asking for general information about the herds including routines from birth to first calving and also routines at breeding calving and during the grazing period. Fifty-eight percent of the questionnaires were returned. The preweaned calves were kept in individual calf pens in 68 and in group housing systems in 28 of the herds. Pens with slatted floors were the main housing system for replacement heifers from weaning to breeding and tie stalls from breeding to first calving. Whole milk was used in 44 and milk replacements in 42 of the herds. The calves received as a median litres of milk per meal and 2 meals per day. The median age at weaning was 8 weeks. Age was the single most common criteria used for deciding both weaning and breeding time. The median age when the heifers were first turned out to pasture was 6 months. Prophylactic anthelmintic treatment was used by 65 of the herds. The most common diet for replacement heifers before calving was a combination of grain hay and silage. colostrum wearing rearing breeding feed plan pasture. Introduction In modern milk production calves are often overlooked. Increased knowledge about their situation is important for offering these animals rearing conditions in which they can maintain good health and adjust to milk production. A link between housing and health during the rearing period has been established by several authors Goodger Theodore 1986 Curtis et al. 1988 Perez et al. 1990 Olsson et al. 1994