The level of conception rate of dairy cows is the main indicator that affects the reproductive performance, and it is also the key to determine the economic benefit of breeding dairy cows. Dairy cow affection rate is affected by many factors such as environment, technology and individual. In order to increase the milking rate of dairy cows, we must pay attention to the following five points: 1. Grasp the law of estrus Observing the cow's estrus is an important basis for timely insemination. According to the degree of follicular development, determining the timing, location and frequency of breeding is also one of the important factors in improving the conception fertility rate. There are five observations to observe the estrus: a look at whether or not to look around. The second is to accept the climb, leaving a mark on the hindquarters. Three to see if the vulva is red, swollen and congested. Fourth, look at the clearness and turbidity of the secretions. Five to see if the milk production has declined. One is listening to cow's tweets. 2. The implementation of three inspections, timely and appropriate insemination Due to the difference in follicular development between different breeds of cattle, some develop rapidly and some develop slowly. Therefore, effective measures must be taken to determine the time, number and location of insemination. Three inspections should be carried out during one period of time in order to grasp the optimal timing of insemination. A test: The rectum is checked after the estrus of the cows, and the development status of the ovary, the growth site of the follicles are touched, and the normal estrus is determined. According to the degree of follicle development, the best insemination time is determined. Second examination: According to the insemination time determined above, once again Check whether the follicles on the ovary are mature, and select the insemination sites and the number of times to perform the first insemination; three tests: 8 to 12 hours after insemination, and then 1 inspection, if the follicle has not ruptured, then insemination 1 Secondary (secondary insemination). Application of rectal grasp method, as far as possible in the uterine horn insemination, as far as possible appropriate timely insemination. 3. Do a good job of postpartum purification work Strengthen postnatal uterine recovery tests 20 to 30 days, such as cattle with uterine incompetence found in the examination, immediately processed, inserted into the uterus through the insemination device, if purulent secretions attached to the anaesthesia, use Drug treatment, with antibiotics (green streptomycin, tetracycline) and normal saline, can be processed three times in succession, and the curative effect is obvious. 4. Properly deal with disorders of reproductive function For the treatment of reproductive disorders (persistent corpus luteum, quiescence of the ovaries) and functional diseases, the main principle is to strengthen feeding management, increase nutrition, use less hormones or no hormones. For the treatment of persistent corpus luteum: (1) pay attention to feed full price nutrition. (2) Adhere to artificial massage, practice has proved that using artificial massage for the treatment of persistent corpus luteum is effective and has no other side effects. (3) appropriate injection of progesterone and other pheromones. 5. Create an excellent environment for semen The operation of semen thawing should be strict and fast and good so that the thawed fine tube frozen essence can pass through the harmful temperature zone as soon as possible. In summer, measures such as ventilation and water-spraying are used to control the temperature of the environment to prevent the body temperature of the cow from increasing. In addition, summer insemination should also pay attention to shading. Smart Door Lock,Smart Security Door Locks,Fingerprint Smart Door Lock,Electronic Key Card System Smart Lock Shenzhen BIO Technology Co.,Ltd. , https://www.huifantech.com