How to improve the conception rate of cows
Familiar with the rules of estrus, milk cows reach sexual maturity within 12 months after birth, and can be bred after 18 months. Estrus is mostly concentrated in months 6, 7, and 8. Estrus duration is between 24-36 hours, an average of 30 hours. The time of ovulation is between 8 and 12 hours after the estrous cow “stabilizes the fenceâ€. That is, in the morning, “strike a stable bar†to instil in the evening, and then lose it again the next morning; or in the evening “play a stable bar,†inseminate the next morning, and lose it again in the evening. Only by knowing the cow's estrus law and mating timing can the cow's eggs and imported sperm be guaranteed to meet in the most vital time, resulting in more opportunities for fertilization. Mastering insemination at the site of insemination generally adopts rectal grasp of cervical insemination. Because the cervix is ​​held by the rectum, the semen can be accurately delivered directly into the uterine horn of the follicular development through the insemination device, and the sperm and the egg are to be matched. Ensure that the insemination index must strictly grasp the technical operating procedures. Defrosting according to the exact temperature, each insemination should guarantee more than 1 ml, more than 0.3 activity, more than 10 million effective sperm. The semen that is sent to the insemination point after thawing should be lowered in temperature, tightly packed, and prevented from shaking. It is best to lose sperm within 2 hours, but it is not more than 8 hours. Doing a good job of reviewing and supplementing cows Due to certain factors, the first estrus period has not been registered. This is also a normal phenomenon. Do not be afraid, let alone give up. It is imperative to register well-transfused cows with good cards, perform pregnancy diagnosis on time, find unvaccinated cows, identify the causes, and reconstitute them in time. Only in this way can the rate of conception increase. Increasing the proportion of maternal females Japan's Heimu Changchun proposes that estrus cows treated with refined nitrogen can increase the proportion of females. The professional and technical personnel of Anda Animal Farm Sun Dianbo and other professional technicians conducted an experimental investigation on the method from June 1986 to August 1987. The results showed that there were 46 females of pregnant cows treated with refined nitrogen formulations, of which 34 were females. The female deafness rate was 73.9%, which was 47.8% higher than the normal male-female ratio (1:1). The difference was significant (P<0.01). Therefore, through this practice, it has been proved that the use of arginine to cause the acidic environment of the uterus of estrus cows to suppress the viability of sperm containing Y chromosome has a significant effect on increasing the proportion of female fleas, and it should be widely popularized. Lactobacillus Rhamnosus,Lactobacillus Rhamnosus Powder,Lactobacillus Rhamnosus Probiotic,Lactobacillus Rhamnosus Supplement Jiangsu Biodep Biotechnology Co. ,Ltd. , https://www.mbioda.com