Practice has proved that the feeding and management during lactation is the key to ensure the normal development of calves. Farmers should raise cattle in accordance with the law of growth and development of calf during lactation, and proper breeding can prevent the occurrence of diseases, and produce high-yielding dairy cattle and beef cattle. . Investigate some cattle breeding demonstration households in Bei'an City and summarize their new technologies, new measures and new experiences for the households in the cattle farms. For example, the lactation period of dairy cows is generally 6 months. During the entire period of lactation, it is necessary to give rich and complete nutrients to cattle, but also to give green roughage as soon as possible to enhance the functional exercise of the digestive organs, and at the same time reduce costs. Different feed types have a great influence on the shape and function of the digestive organs of yaks. Yak is less than 1 year old, and the growth and development of digestive organs is the strongest. The calf's first gastric volume was only about 1.1 liters. The digestive power of botanical feed was very low within 15 days of age. However, the provision of some roughage at 14 to 21 days of age can promote rumen growth. The fourth week after birth, the rumen stomach wall develops rapidly, and feeding some grass is very important for the development of the rumen. Farm cattle breeding should be given great attention. The three-month-old yak's ability to secrete digestive enzymes in the digestive tract is increasing rapidly. The rumen has a large volume, which enhances the function and can digest large amounts of plant feed. The farmer raises cattle. During this period, he should pay attention to feeding a large amount of green roughage. This can not only promote the development of the forefoot but also increase the secretion of the pancreas. Feeding milk alone can cause rumen hypoplasia and raise feed costs. However, calves in the 4 to 6 months of age undernutrition, affect ovarian development, 6 to 7 months after the uterus growth is blocked, delayed sexual maturity, secondary sexual characteristics are slow. Phosphorus deficiency in diets impedes skeletal sclerosis and affects the development of hematopoietic organs. It also affects later reproduction and milk production performance. Generally from the age of about 3 months, artificial milk is used instead of milk (a 1.5 kg artificial milk is replaced every day, and gradually replaced), and a large amount of forage should be added. Artificial milk, farmer cattle can be used as follows feed formulation: 60% soybean, broken rice 25%, 15% barley (first germinated to 2 ~ 3 cm long), mixed milled pulp, add 8 times water, boiled for 15 minutes, Add 0.2% salt and calcium carbonate. After special cattle are raised to about 6 months of age, they can be weaned.
Mahi Fillet
Zhoushan City Shuangying Aquatic Products Co., Ltd.  , https://www.shuangying-aquatic.com