According to a reader from Sheyang County, a total of more than 30 ewes and a Boer ram were raised. Since the sheep’s estrus time is different, the ewes’ breeding time and production time are different. All are busy, he wants to implement the same period of 30 oestrus estrus, and then the entire group of sheep for the overall management, he would like to ask, during the same period of estrus drugs which side to sell? The reporter contacted the researcher Wang Gongjin, head of the embryonic engineering project team of the Animal Husbandry Institute of the Jiangsu Academy of Agricultural Sciences. He said that the current use of estrus prednisone (PG) and maternal serum gonadotropin in goats is more commonly used. PMSG), follicle stimulating hormone (FSH), triad hormone, and vaginal suppository. There are two commonly used concurrent clinical estrus drugs, one is to perform estrus at the same time in two stages, first use progesterone vaginal suppository, vaginal suppository treatment, first apply a special lubrication ointment on the sponge plug, place the device with a sponge bolt Put it into the deep vagina of the ewe (the length of a chopstick). The nylon pull wire on the sponge plug stays 3 to 4 cm long outside the vagina and cuts off the excess. Generally, when the vaginal sponge plug is placed in the vagina for 12 to 13 days, it can be pulled out with a hemostatic forceps to clamp the vaginal traction wire, and then 500 units of PMSG are usually used. Generally, the estrus rate reaches 90% during the same period. The first batch of sheep is in the same period. After the estrus treatment, the second batch of sheep is processed. The second is to perform estrus at the same time and directly hit PG 500 units. Generally, a small amount of ewes will have estrus symptoms after 24 to 48 hours. When ewes appear to have symptoms of estrus for more than 10 hours and actively accept rams to climb, they can be bred. . In addition, Wang Gongjin's researcher also stated that during the estrus process, FSH 300 unit injections can be used to promote superovulation, usually 2 times a day for 3 to 4 consecutive days. After further enquiry by the reporter, the reader said that after he implemented the estrus of the ewes in the same period, he wanted to use the ram to conduct natural breeding in batches. Professor Wang Gongjin said that more than 30 ewes used a ram for natural mating after the same period of estrus, which is undesirable and has a greater impact on rams. In the case of guaranteeing the conception rate of ewes, only 1 ram can normally mate 1 to 2 ewes for 1 day and 1 in the morning and 1 in the afternoon. After the whole group has implemented estrus in the same period, if 50% of the ewes need to be estrus, 1 ram will need to be bred 30 times a day, but the amount of sera, sperm motility, and density produced by the ram each day are relatively fixed. If forced to carry out natural mating, on the one hand, the useful life of the ram will be shortened. On the other hand, the gestational ewe's conception rate and breeding rate will also decline, and some may even delay the best breeding time of the ewes. . Professor Wang Gongjin suggested that after the implementation of estrus in the same period, it is best to use artificial insemination for breeding (For details of artificial insemination methods, please refer to the fifth edition of Jiangsu Agricultural Science and Technology Daily No. 2379). Artificial breeding of rams for 1 time can be performed after dilution. 10 to 20 ewes, so no matter what kind of estrus technology used during the same period can achieve the purpose of breeding at the same period. Edible Starch Mixer,Starch Mixer,Coupling Starch Mixer,Yam Starch Mixer Shuangfeng County Dingyuan Machinery Manufacturing Co. Ltd.. , https://www.separators.pl