[ Objective ] The paper was to study growth and physical structure of Holstein cows at specific phase under intensive rearing conditions in the South China. [ Method] The body sizes of 279 Holstein cows including 49 c...[ Objective ] The paper was to study growth and physical structure of Holstein cows at specific phase under intensive rearing conditions in the South China. [ Method] The body sizes of 279 Holstein cows including 49 calves, 35 young cows and 195 adult cows in the experimental farm of Yangzhou University were measured. The raw data were processed by computer to obtain body size index at various physiological stages. The body size indexes were analyzed by SPSS 15.0 software to reflect changes in different physiological stages and various parities of cows. Body size indexes such as body height, body length and heart girth of young cows and calves were fitted by scatter plot. [ Result] The eider the cows were, the longer their bodies were. Calves had a stable growth and development. The body size of young cow at different month-ages was imbalanced. The physical structure of adult cows showed no regularity at different parities, so the specific feeding for growth and development of bone should be strengthened in multiparous cows. [ Conclusion] The study provides reference for keeping management of calves, breeding and keeping management of young cows as well as selection and assortative mating of adult cows.展开更多
文摘[ Objective ] The paper was to study growth and physical structure of Holstein cows at specific phase under intensive rearing conditions in the South China. [ Method] The body sizes of 279 Holstein cows including 49 calves, 35 young cows and 195 adult cows in the experimental farm of Yangzhou University were measured. The raw data were processed by computer to obtain body size index at various physiological stages. The body size indexes were analyzed by SPSS 15.0 software to reflect changes in different physiological stages and various parities of cows. Body size indexes such as body height, body length and heart girth of young cows and calves were fitted by scatter plot. [ Result] The eider the cows were, the longer their bodies were. Calves had a stable growth and development. The body size of young cow at different month-ages was imbalanced. The physical structure of adult cows showed no regularity at different parities, so the specific feeding for growth and development of bone should be strengthened in multiparous cows. [ Conclusion] The study provides reference for keeping management of calves, breeding and keeping management of young cows as well as selection and assortative mating of adult cows.
