咽下
发表于 2025-3-28 17:06:21
Sire Evaluation for Dystocia in Dutch Cattle Breedsr cows 2%) and in Dutch Red-and-White (MY) 6.5% (heifers 15%, second calvers 4%, older cows 2%)..Dystocia data obtained during 1969 – 73 for MRY AI centres in the.Province of North Brabant for 30 232 heifer and 109 306 cow calvings have.been analysed by Pijnenburg (student thesis, University of Wage
真繁荣
发表于 2025-3-28 22:40:58
Comparison of the Main European Cattle Breeds Used in Industrial Crossing on French Friesian Dairy Cving s and birth weight, are given in Table 2 and Figure 1. It can be noticed that: 1) All breeds used increase the weight of calves more or less markedly, but calving difficulties only become frequent with a birth weight of over 42 – 45 kg. 2) British breeds (small sized) do not reach this birth we
Demulcent
发表于 2025-3-29 01:29:26
Survey of the Incidence of Calving Problems, Calf Mortality, and their Economic Importance: Dairy anribes first the results obtained from observations on calving in dual-purpose breeds made at the Institute of Animal Husbandry and Animal Behaviour over many years. Based on these results, the main interrelationships and factors influencing the occurrence of calving problems and the loss of calves a
narcissism
发表于 2025-3-29 03:28:51
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ARCHE
发表于 2025-3-29 10:14:52
Selection for Double-Muscling and Calving Problemshe Blue Belgian breed. This selection has succeeded in producing supermeaty animals of very high value for the butcher but has increased calving difficulties to a large extent..Data concerning this problem are analysed and the following points are studied: annual increase in difficult calvings, infl