A Study on the Causes Reproductive Disorders of Dairy Cattle in Introduced Cheju-do III. The Investigation of Feeding Status and Amount of Milk

제주도입유우의 번식장애원인에 관한 연구 III. 사료급여 실태와 비유량 조사

Feeding ratio in relation to milk production, usage of silage, hay and minerals and vitamin suplement were investigated from 5 dairy farms located in the areas of Cheju city, Jochun, Hallim an Sung-up. In this survey conducted on the dairty cow of 51 farms in the four districts of Cheju-do, it was suspected that the reproductive disorders seemed to be high because of inadequate feeding of roughages (especially silage) and increasing feeding of concentrated feeds. The average milk production of dairy cows was 21.3 Kg in spring, 19.3 Kg in summer, 16.2 Kg in fall and 15.7 Kg in winter.