A lactating period of a lactating cow can be generally divided into an early stage of lactation, a prolific period of lactation, a late stage of lactation, and a dry period of lactation. Due to different production conditions, production performance, and feeding characteristics of dairy cows at different stages, the requirements for feeding and management are also different. At present, the feeding methods of dairy cows include conventional feeding methods, advance feeding methods, and challenge feeding methods. 1. Conventional feed green feed, rough feed and auxiliary feed meet the nutritional needs of dairy cows. Concentrated feed meets the nutritional needs of milk production. Dairy cows feed 1 kilogram of mixed concentrate for every 3 kilograms of milk produced. This type of “feed by milk†The feeding method is called conventional feeding of dairy cows. It is suitable for normal dairy cows in the late lactation. 2. Pre-bred raising method starts from 15-20 days after the cows are born, and on the premise of eating enough raw and auxiliary materials, based on the actual nutritional needs of the maintenance and lactation according to the milk feeding, 1.0-1.5 is added every day. The kilograms of mixed concentrates are used as prepaid feeds to increase milk production; during the whole period, the amount of concentrate feed increases with the increase of milk production until the increase of concentrate milk consumption no longer increases. This feeding method is called the advance feeding method, also known as short-term superior feeding method. This breeder's method is suitable for cows whose milk production is generally in the lactation stage. 3. The challenge feeding method is based on the normal feeding in the dry milk period, starting from the expected two weeks before delivery, adding 0.45 kg of mixed concentrate daily, and the amount of concentrate feeding at the time of delivery can reach 0.5%-1.0% of body weight. After the calving, if the cow's physique is normal, 0.45 kg of mixed concentrate may continue to be added on a daily basis before feeding, until the increase in concentrate milk volume no longer increases or the concentrate feed reaches free intake. However, the amount of roughage should not be less than 0.5% of body weight. After the milking period has passed, gradually reduce the material. This breeding method is characterized by guiding the training of the cows to feed concentrates from the prenatal period, and preparing for the physiological functioning of the large amount of post-natal concentrates. Therefore, this feeding method is also referred to as the guiding feeding method; and in the production After a certain period of time, feeding high-energy, high-protein concentrates can effectively reduce the consumption of bovine body and maximize the potential of lactation of postpartum dairy cows, thus it is also called the challenge breeding method. It is suitable for the breeding of high-producing dairy cows from the first two weeks of delivery until the end of the lactation peak.
Bulk of varicella vaccine,semi-Finished Products.It has good safety with low ratio in adverse reaction. And it has been exported to Bangladesh.
In 2008, BCHT successfully launched its product Varicella Vaccine, Live in China. In the following years, BCHT continuously committed to improving the product and led in 2010 removal of gelatin from adjuvant and extended the vaccine shelf-life up to 36 months which is the longest one in the world in 2011. And it has the following qualities.
Biotechnology Bioproducts Preventive,Final Bulk Medicine Preventive,Final Bulk Pharmaceutical Preventive,Vaccine Biological Products Preventive
Changchun BCHT Biotechnology Co. , http://www.ccbcht.com