Techniques for improving the fecundity of Yellow cattle

Select the good and clean up the bad, improve the fecundity

In order to improve the fecundity of cows, strict breeding should be carried out, and high quality cows with good appearance, healthy, docile temperament, good feeding performance and obvious symptoms of estrus should be selected. high reproductive performance, such as high conception rate in the first estrus, short estrus time after delivery, low abortion rate and high delivery rate. Eliminate low-quality cattle with small size, poor motherhood, bad habits, rough temperament, oversensitive nerves, no obvious symptoms of estrus, continuous return of estrus for more than 3 times, disease or disability, older age, declining production performance and poor reproductive performance. Through improvement and selection, cow herds with excellent reproductive performance were gradually established.

Strengthen the feeding and management and grasp the fat condition of the cow

Too high or too low nutrition level will have different effects on estrus, conception, embryo quality, reproductive system function, endocrine balance, various complications during delivery and so on. Therefore, according to the requirements of different physiological characteristics and growth and production stages of cows, scientific feeding should be carried out, mainly roughage, reasonable collocation of concentrate, green fodder and roughage, strict control of body weight, and normal estrus mating of cows. improve the conception rate of cows.

Shorten the empty time and increase the reproduction rate

After estrus, cows correctly judge each stage of estrus and choose the most suitable time for insemination and breeding. According to the reproductive physiological characteristics of cattle, it is ideal to give birth to calves once a year, and it usually takes 30 ~ 40 days for cows to recover their uterus after delivery. Therefore, 40 days after delivery is a crucial period for cow reproduction, so we should focus on strengthening management, such as drug treatment after delivery, promoting the recovery of uterus and ovarian reproductive function, providing scientific feeding and management conditions and creating a suitable environment. If it is found that the cow is still in estrus after 50 days of postpartum, the cow's health, nutritional status, ovary and uterus should be examined and treated in time to prevent empty pregnancy and infertility. Drugs and other methods can also be used to improve the mating rate of cows.

Strengthen the feeding and management of pregnant cows and improve the calving rate

Within two months of pregnancy, the embryo is free in the uterus and gradually completes the implantation process. The fetus changes from relying on uterine milk secreted by the endometrium for nutrition to relying on the placenta to absorb maternal nutrition. In this period, if the feeding level of pregnant cows is too low, especially when the feed quality is poor, the secretion of uterine milk is insufficient, which will affect the development of embryos and cause embryo death; in the late stage of pregnancy, due to the rapid growth and development of the fetus, the demand for nutrients increases greatly, in this period, do not pay attention to strengthen feeding, lack or incomplete nutrients in the diet, it is very easy to cause miscarriage and premature delivery. If the feeding level is too high, it will cause weak calves, stillbirths or dystocia in cows. Among the nutrients, the satisfaction of protein, minerals and vitamins is particularly important to prevent feeding feeds such as spoilage, excessive acidity, frost, poison and cold drinking water; the management of pregnant cows should be reasonable and exercise should be appropriate. strictly prevent frightening, slipping, whipping, top shelf, etc., for those who have experienced abortion, we should strengthen protective measures and, if necessary, take placebo or injection of progesterone and other drugs to protect the fetus.

Scientific feeding and management to improve the survival rate of calves

Strengthening the feeding and management of pregnant cows, especially in the later stage of pregnancy, is helpful to improve the birth weight and survival rate of calves. Newborn calves have no immunity, only after eating colostrum, immunoglobulins in colostrum are absorbed into the blood through the intestines, calves have immunity, so the earlier the time to eat colostrum after birth, the better. In order to reduce the mortality of calves and cultivate healthy calves, newborn calves must eat colostrum within two hours after delivery and eat as much as possible. Calves can be trained to eat fine fodder and high-quality roughage 7 ~ 10 days after birth to promote the development and function of calves' intestines and stomach and prepare for weaning in advance. Avoid calves lying on cold and wet ground, eat unclean food, prevent diarrhea and other diseases, and improve the survival rate of calves.