Strengthening cow breeding management requires standardization of breeding management, supporting technologies to be in place, mastering the law of cow estrus, and improving artificial insemination techniques. First, measure the index of fertility. (1) Annual fertility rate: 90% or more; (2) Emotional conception rate: 65% or more; (3) Annual reproductive rate: 85% or more; (4) Calving interval: 12-13 months; (5) Initial age: 15-16 months (weight) Reached 70% of the year). Second, comprehensive measures to improve fertility 1, pay attention to breeding fertility selection. It is necessary to examine the ancestry, appearance and reproductive performance of the breeding bull. 2. Master the rules of estrus in cows. Pre-combined cows should understand the characteristics of estrus and the time of estrous estrus; observe estrus 3-5 times a day, and the time for each observation should not be less than 30 minutes. In particular, it was observed that the estrus detection rate was higher before 6:00 AM and 8:00 AM. 3, correctly grasp the estrus identification and timely breeding. In general, the estrus of cows goes through excitement for more than half a day, and they are transferred from static excitement to climbing. When the mucus outflow from the vagina is changed from a large amount of transparent to a small amount of viscous, the follicular development in the rectal examination is in a mature period. The breeding phase. A rectal examination is performed after about 30 days after mating to determine whether or not to conceive. 4. Analyze and deal with breeding obstacles scientifically. For example, if the cow's estrus interval is less than 17 days or more than 24 days, the age is past 14 months without estrus or after 60 days without estrus, the insemination three times without gestation, and the postpartum non-season reasons with 5 months Pregnant cows, or cows that are not pregnant and are not estrus for a long time, must analyze the causes scientifically in time and adopt symptomatic measures: (1) Malnutrition. The nutritional status of cows has a very close influence on their fertility. Generally, dairy farms have different stages of feed and supply rations according to the feeding standards. However, in practice, the cows are often over-fertilized during dry milk, and postpartum cows or cows at the peak of lactation have excessive moisture. It is a nutritional imbalance. Therefore, body condition scores are performed at each breeding phase of the cattle. For example, if the five-point scale is adopted, the dry-milk cows must maintain 3.5-3.75, and the cows at the peak of lactation should be maintained at 3-. Between 3.5. (2) Effects of heat stress. When the temperature rises to 26°C, the individual cows' heat dissipation is hindered, and their effects on lactation and fecundity are affected to varying degrees. Therefore, ventilation and exhaust ventilation of the cowshed and spraying of tap water should be used to mitigate the effects of heat stress during the high temperature phase. . (3) Perinatal infection. Doing a good job in the perinatal health care of cows plays an important role in the prevention of precocious puberty, stillbirths, and prenatal and postnatal infections in cows that cause cow reproductive and infertility. In practice, it is often found that prenatal infections caused by lax production arms are not strictly sterilized, and postpartum factors return to chronic lameness, infections, and secondary infections, resulting in endometritis and prolonged postpartum fertility or infertility. It even caused systemic sepsis that caused the death of the cow. It must be emphasized that only the correct diagnosis of the breeding obstacle cattle, if necessary, combined with blood endocrine diagnosis, can the correct use of reproductive hormones or drug treatment, can not blindly use reproductive hormones. (Source: Zhejiang Agricultural Network)
Quick Details
Type:Hemp Seeds
Cultivation Type:Common
Purity:99%
Moisture:12%max
Place of Origin:Shaanxi/Ningxia, China (Mainland)
Brand Name:Papa Favorite
Hybrid:No
Color:Yellow
Product name:Hemp seeds
Admixture:0.5%max
Imperfect:1%max
Origin:China
Packing:25/50 Kg Pp Woven Bag
Grade:AA Grade
Shelf Life:24 Months
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