Colostrum is a thick creamy yellowish secretion (commonly known as "yellow milk") secreted by cows 5 to 7 days after calving. Colostrum is not only rich in nutrients, but also contains substances that have laxative effects such as enzymes, antibodies, and immune bodies. Colostrum contains a large number of biologically active substances, mainly including some immunologically active substances such as immunoglobulins, lactoferrin, immune cells, and other unknown growth-promoting factors such as insulin-like growth factor, epidermal growth factor, and transforming growth factor. Fibrous growth factors and platelet-derived factors. The milk that was secreted after more than 290 days was regular milk, which is the milk that we drink daily. Burdock and infants, like the baby, are still immature at the time of their immune function, and they are hard to face the tens of thousands of pathogens and toxins in the environment. Colostrum is the sacred product that protects the young calf's life. The Effect of Colostrum on Growth and Development of Calves The special role of colostrum New calves due to gastrointestinal empty, the fourth stomach and intestinal wall mucosa is not very developed, the resistance to bacteria is weak, and colostrum in the special function is to replace the role of intestinal mucosa, colostrum covered in Gastrointestinal walls can prevent bacteria from invading the bloodstream and increase resistance to disease. Colostrum and immunoglobulins in colostrum can kill a variety of pathogenic microorganisms and inhibit the activity of certain pathogens. K-Ag lectin can resist E. coli in special strains. After feeding colostrum, it can effectively prevent diarrhea caused by E. coli in calves in 3 weeks. The high acidity of colostrum can make gastric acid become acidic, which is not conducive to the derivation of harmful microorganisms, but it is conducive to the activation of the activity of digestive enzymes in the stomach and promote the improvement of gastrointestinal function as soon as possible. There are more magnesium salts in colostrum, which has laxative effect and can promote the elimination of meconium. Colostrum is rich in easily digestible nutrients, and can promote the secretion of large amounts of digestive juice in the fourth stomach. A large number of digestive enzymes can promote Gastrointestinal function is formed as soon as possible. Improving Immunity Newly born calves are not immune. The immunomodulatory peptides, immunoglobulins, and other immune substances in colostrum can promote the production of T cells in the thymus, enhance immunity, and at the same time regulate and correct immune dysfunction, so that the violation of the body's immune viruses no longer appear. After calves eat colostrum, immunoglobulins are absorbed directly into the blood through the intestinal wall in an undigested state, giving the calves passive immunity. Growth-promoting effect Colostrum is a source of nutrients and a carrier for biological growth of active substances. It can strengthen the body's metabolism, promote the synthesis of body tissues, and change the body's endocrine state. Milk-derived polypeptide factors are Yak's intestinal growth plays a major role. Colostrum feeding technology Feeding methods Once the yak's breathing is normal after delivery, the calf should be fed to colostrum in good time (preferably within 1 hour) and 5 kg in the next 24 hours to ensure adequate antibody protein levels. The optimum environment for newborn calves is 25°C. Therefore, thermal insulation, ventilation, light and good housing conditions should be given to gradually raise the ability of yaks to respond to the outside world. Calf colostrum fed to calves should be between 36°C and 38°C. In order to ensure that the milk temperature can be warmed by a hot water bath, direct warming milk is easy to set. If milk is used to feed colostrum, it should be guided manually. Usually the person sticks his/her finger in the milk to allow the calf to suck. No matter what the tool is used for feeding, it must not be forcibly poured. Frail calves or calves that have been midwifery. Most of the first feedings are very weak and the amount of drink is small. They should have the patience to feed several times in a short time to ensure the necessary amount of colostrum. The second should be given after 4 hours to 5 hours and then 3 times per day. The temperature during feeding is kept between 35°C and 38°C. The hypothermia colostrum must be warmed to prevent the yak's gastrointestinal motility and lead to diarrhea. Conversely, if the temperature is too high, the stomatitis may occur due to overstimulation, or the calf may refuse to eat colostrum. During lactation period of 1 hour to 2 hours each time, should drink warm water (35 °C -37 °C) for water. The amount of feed should be based on the weight of the calf, each time the amount required is different (1.25 kg -2.5 kg), should be fed 3 times -4 times within 24 hours, each feeding amount can not exceed the calf's stomach volume ( 5% of body weight). Disinfection feeding utensils Primordial milk can be cleaned with a clean bottle or a milk bucket. All containers must be thoroughly cleaned and disinfected before and after use to cut off the route of transmission of the bacteria. When raising calves, several points should be taken care of: selection of breeders; supplement of calves with drinking water; utensils used for milking of calves, should be carefully washed and disinfected with water above 40°C after each feeding. Diy Dog Steps,Best Dog Stairs,Folding Pet Steps,Pet Steps For Cats Eastony Industries (NingBo) Co., LTD. , https://www.eastony.com