Affecting the "triple rate" of dairy cows
1. Cows are poorly fed. The lyrical condition is the basis of the estrus of the cow, and the lyrical condition is directly related to the level of the allocation rate. Due to the low feeding and management level of dairy cows and the effects of lactation and other reasons, the body's nutrient cannot enter. Therefore, the secretion of the anterior pituitary gonadotropins (Lutein and follicle stimulating hormone) was inhibited, and the follicles on the hatching nests remained static for a long time. The corpus luteum persisted and the cows could not be estrused according to the normal law. According to the Anda State cows According to field survey statistics, the cows accounted for 50% of the estrus rate, 60% of the estrus were 40.8%, and 70% of the quails were 92%. This proves that sensation is proportional to estrus. 2, cows lack tube VE. VE is a nutrient necessary to maintain the normal reproduction and health of dairy cows. When dairy cows increase their milk production, feed alone in the diet cannot meet the required active VE in cattle. Therefore, the lack of VE in cows is one of the important causes of early embryonic death. 3, suffering from obstetric diseases. There are many types of obstetric diseases in cows. Common diseases include endometritis, vaginitis, and cysts. The main reason for this is related to the improper handling of postpartum labor and the poor operation of artificial insemination techniques and semen contamination. 4, calves long lactation. After the calving of the cows, the calf sucks for a long time, some for as long as a year. Due to the anti-proliferative effects of lactation, prolactin inhibits the secretion of gonadotropins, thus extending the fasting period. Cows usually start estrus 60 days after childbirth, and more than 100 days. Therefore, only 15% to 21% of natural estrus occurs in nursing cows. If you do not take early quarantine measures, you will have to live for one year. 5, the level of cold matching technology is low. Some breeders did not have specialized training, but they were only partially theoretically knowledgeable. They were unable to grasp the identification of estrus cows because of the large scale of operations. Therefore, they sometimes resulted in mis-matching and missed allocation. In addition, some rectal grasp insemination is not skilled, insemination site is inaccurate, and the semen is lost to the urine. At the same time, some will not touch the ovary, will not diagnose early pregnancy, will not thawed semen, even if the cow estrus is normal it is difficult to register. Qingzhou JuLong Agriculture Equipment Co.,Ltd , https://www.julonggrowtech.com