Feeding calves too early or too late adversely affects their growth and health. Practice has proved that it is most suitable for yaks to start feeding at 3 weeks of age. Because the burdock was born (that is, within 3 weeks of age), its rumen, reticulum and valve-stomach are very small, it does not have the function of digesting forage, and there is no microorganism and ciliate, burdock can only eat milk into the stomach ( The fourth stomach) is for absorbing and utilizing nutrients. If grass is fed at this time, it will increase the burden on the rumen, reticulum, and stomach and cause disease. If you start to feed too late, the gastrointestinal long-term dependence on milk, rumen, reticulum, valve stomach can not get exercise, these three stomach growth is slow, its volume is too small, to the youth and adulthood to eat less, affect the growth Development and health. After 3 weeks of age, the burdock rapidly enlarges its rumen, reticulum, and valve-stomach, and due to exposure to small amounts of food and water, microorganisms enter the forequarters (rumoma, reticulum, and valve-stomach) through the oral cavity. At this time, calves Rumination also began to appear. At this time, fresh green grass, wild vegetables, high-quality dried grass, crushed fine feed, etc. are started to be fed, and the amount of feed and the amount of roughage are increased as the age of the week increases. In this way, both the disease caused by the overly tender stomach and the development of the foregut stomach can be avoided, which promotes the reproduction and growth of microorganisms and ciliates in the rumen, and gradually enhances the function of digesting forage fodder. After eating a lot of roughage, grow up, increase the weight and lay a good foundation.
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