The technical route aims to improve dairy cows' quality resources, and based on continuous improvement of feeding and management conditions, it focuses on the promotion of bull-frozen semen artificial insemination with proven improved performance through the use of descendants, and appropriate use of bioengineering techniques (eg, estrus in the same period, Superovulation, in vitro fertilization, embryo segmentation, embryo transfer, parthenogenesis, cell cloning, and sex control, etc., to accelerate the reproduction rate of excellent males and females, and to increase the "triple rate" of cows (rate of fit, Continuity rate and calving rate), comprehensively increase milk production and milk quality, cultivate long-lived, high-yielding dairy cows, increase individual yields, and appropriately expand the number of targets. The technical measures are as follows: 1. Introduce fine breed bulls, frozen semen and frozen embryos, run a livestock improvement station, and select and cultivate excellent bulls. The bulls used must be subjected to performance tests and progeny tests to confirm that they have improved effects before they can be widely used. 2. Introduce a system for improving the production performance of herds commonly used in the world, record data on the quantity and quality of milk produced by individual dairy cows in some core herds, analyze the software, and propose monitoring reports. Guiding cattle farmers to raise, breed and manage dairy cows more scientifically. By raising the nutritional level of dairy cows, obtaining excellent genetic resources and more accurate selection and elimination methods, the goal of long-term high-yielding dairy cows is finally guaranteed. 3. Grasp the fetal reproductive fertility rate from three aspects. First, do a good job of the cow's healthy nutrition and reproductive management, provide guarantees for the maintenance of its normal reproductive function; Second, the professionalism and technical level of artificial insemination personnel; third is to ensure that the use of the bull on the basis of excellent germplasm resources The semen density, vigor, and sperm deformity rate all meet the required standards and have good insemination capabilities. 4. According to the nutritional and physiological characteristics of dairy cows, the cultivation, harvesting, brewing and storage of quality roughage (legume hay and corn silage) should be well managed; the diet should be properly prepared to maintain a good fermentation and synthesis of rumen. Prevent the occurrence of digestive tract and metabolic diseases in dairy cows. 5. To adapt to the needs of the development of dairy cows' industrialization, change the planting system in areas where the concentration of cows in the suburbs is relatively concentrated. From the binary planting of “grains and classicsâ€, it was gradually adjusted to the ternary planting of “grain, economy, and grassâ€. To adapt to the practice of returning farmland to forests and grasslands in the mountains, some enterprises are encouraged to devote themselves to the processing industry of pasture. Through timely harvesting, drying (or baking), baling, smashing and other means to provide quality dairy cows (but to mutual benefit). Leaf protein can also be produced where conditions permit. 6. Strengthen dairy cows' health management, prevent obstetric diseases and mastitis, reduce the abnormal elimination rate and mortality of cows, increase the average parity of cows, and cultivate high-yield, long-lived cows. 7. Based on actual conditions, actively create conditions, use a limited amount of bioengineering technology, and expand and extend the useful life of the public and cows, the range of use, and the number of breeding offspring. There are plans to stage classes for cows in batches in phases to promote the knowledge of feeding and management of dairy cows, and gradually change the habits of the people in keeping cows in the way of raising cattle.
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