1. What is the level of development of porcine artificial insemination at this stage? What are the gaps between the developed countries in China and other pig artificial insemination technologies? At this stage, China's porcine artificial insemination technology can be said to be in the period of promotion and use. The utilization rate of large-scale pig farms in China (above 50 sows) is about 50%. The technology has relatively high requirements for the quality and ability of users. Although most pig farms receive artificial insemination technology, due to the constraints of various conditions, the effect of the technology in the actual use process is not well reflected, and it is still preserved. The method of delivery or combination of artificial insemination and this combination. In recent years, some companies have established boar stations to promote artificial insemination technology nationwide. However, because the quality of pigs is not guaranteed, the husbandry management technology and service technology are not mature enough, they are not widely accepted, and the promotion effect is not satisfactory. At present, in countries with advanced artificial insemination technology, the quality of employees is relatively high. This technology has also developed into an independent industry. There are professional companies operating with well-equipped equipment. The service radius of each boar station is 500 km. Sows breeding grounds do not raise or raise a small number of boars as a test. 2. What training should porcine artificial insemination technicians receive? The quality of technicians is the main factor limiting the use of artificial insemination in pigs. At present, the main reason for the low utilization rate of the technology in China is that the sperms are dead in the process of collection, dilution, storage, and transportation of semen, resulting in sperm death, inaccurate sow oestrus identification and inappropriate insemination, resulting in sows using artificial insemination. The conception rate is relatively low. Therefore, pig artificial insemination technicians should receive training on the basic knowledge of breeder physiology, factors affecting semen quality, and the details of pig artificial insemination operations. In addition, the summary of experience in sow estrus identification is also important. 3. What precautions should be taken in the sperm collection process to ensure semen quality. 1. The collection cup must be protected from light and warm; avoid using transparent glass as the harvesting cup. Pack the filter paper before use and preheat it to 38°C. 2, cut the foreskin coat, squeeze the accumulation of urine inside the foreskin. After using a low-level disinfectant, clean the abdomen and foreskin of the boar and wipe dry with water. To ensure that the pig body is clean and prevent foreign matter from falling into the harvesting cup; when harvesting, the position of the harvesting cup should be higher than the foreskin part to prevent the liquid in the foreskin from flowing into the collection cup. 3, do not let go during the ejaculation, otherwise the pressure will reduce the ejaculation will be interrupted, you can adjust the degree of tightness of the palm of your hand, so that you can collect more high-quality semen. Note that do not touch the penis body during sperm collection, otherwise the penis will quickly retract. 4, the first part of the ejaculate semen is not connected (about 5-10ml), wait until the emergence of milky semen began to collect. 5, the original semen storage time can not exceed 30 minutes, should immediately carry out quality checks and dilution. 6, such as with green is mixed with pus, with pale red or reddish brown is mixed with blood, yellow is urine. Where semen is found to be abnormal in color, indicating semen impure or boar genital lesions, should be discarded. Dried Green Bean,Frozen And Dried Green Beans,Sliced Air Dried Green Beans,Freeze Dried Fd Green Beans Jiangsu Tiankang Food Co., Ltd. , https://www.tiankangfood.com