Cattle And Reserve Base For Growth And Development Of Cow Research

In order to correctly evaluate the reserve Holstein cows in Western Inner Growth and Development,chosen in different parts of six different herds,different environments,different feeding and management conditions of 0 to 24 months of a total of 1219 Holstein cows back,according to months of age were divided into eight stages:0 to 7 days,before and after weaning,6 months,9 months,12 months,16 months,20 months,24 months of age segment. Measured height,weight,body,lengthchest,hip,etc,around the five indicators,and calculated the average daily gain of each stage,total bust,the cumulative increase in months,total body length,total hip circumference , while investigating a feeding management and rearing environment, analyzed the dietary supply situation. Cattle populations of different height and weight measured and the physical development of the Japanese Holstein cows back the scope of the standard value comparison: Overall,in eight stages and 20 months of age of weaning weight is generally lower than the standard range,weaning high body generally lower than the standard range; other month section of body height and weight are at a standard value range。...