Analysis on Growth and Development Pattern of Holstein Cows in Changji Area of Xinjiang

The aims of this study were to understand the relationship between the indexes of body size and body weight in Holstein cows, and the variation pattern of body size and body weight of different age stages of Holstein cows in Changji area of Xinjiang were analyzed.This study based on the measurement record of the body size and body weight of 2 972 Holstein cows of different age stages from 2012 to 2013 in Changji area of Xinjiang, obtained the body size index of different age stages, and mapped out the cumulative growth curve, absolute growth curve and relative growth curve;At the same time, carried on a correlation analyses between each body size index and body weight of Holstein cows.The results showed that along with the increase of age, body size index and body weight of Holstein cows were increasing;At the age of 1 to 3, the growth and development were rapid, it was the most important period for the growth and development of cattle.The correlation coefficients among body height, body length, chest circumference, cannon circumference and body weight were reached significant level (P< 0.01).It was important to pay special attention to breeding management of Holstein cow before three years old, and ensured its nutritional requirements in order to achieve the best physical condition in the process of breeding.