The Application And Research Of DHI System In Southern China Area

In Southern China, as it is situated at the subtropics, the burning hot climate has brought the huge influence on cow's production and health, even the cow's breed and trait are very poor, the management level are very lower. In order to enhance milk production, improve the production level condition, we should select the science technology of raising management to raise cow's industry level of development. DHI (Dairy Herd Improvement) system is the most advanced farm management tool in the international, which is the basis for weighs the cow field management level, so can be enhance the cow group management and lives the milk quality level, and provides the accurate data for the dairying scientific research.This research's foundation diet is basis on corn ——wheat bran concentrated feed and alfalfa, corn straw stalk, through animal feed experiment to discussed the applies and research of DHI system effect on the lactating cow's milk production, the milk ingredients, the somatic cell count (SCC) in the milk under the south climatic conditions. The experimental time is from January to December 2005. The experimental animal is 110 Holstein lactating cows, which comes from the Hunan Province raising livestock veterinarian research institute cow stock field Through milk type gathering and the milk ingredient, the SCC determination in each month, forms the DHI monthly statement. According to the DHI report form, to reflects the related information, and to adjust the reasonable accent grain formula, the cow group structure, completes the mastitis the track prevention work, so can be display cow's production performance with biggest potential and raises cow's industry production level in southern China, and provides the science reference for further application and promotion of DHI system in the south China area.The test result indicated that:1, Under the south raising conditions, the DHI system application can remarkably enhance the Holstein cow's milk production quantity, such as 305 days estimates milks quantity enhances from determination before 2861.27kg to present 3166.83 kg, enhanced 10.7%. The matured equivalent enhances from determination before 3173.69kg to present 3481.36kg, enhanced 9.7%.