Spring is the peak period of cattle mating, but climate change is unpredictable and the incidence and mortality of cattle are extremely high. Therefore, it is necessary to strengthen the feeding and management in the spring, scientifically fertilize the fetus, ensure the safety of the mother and child, and increase the reproduction rate. First, empty cows Every day, each cow is fed with 50 grams of salt and 1-2 kilograms of barley, corn, soybeans, and other blister mixed concentrates. After the first drinking water, feed the grass, wait until the cattle have eaten until the five or sixty percents are full, feed the mixed concentrate, then drink the salt water, and wait for the cow to rest for 15 to 20 minutes before going out. After grazing, prepare enough water and night grass to allow the cow to freely drink and eat. When the cow is too fat, it can increase the amount of jousting, and feed more coarse material and juicy feed. If you are too thin, make up the fine material and green feed, and strive to achieve a medium sensation before breeding. Second, estrus cows timely breeding After the cow was estrus excited and uneasy, and constantly whispered, Gao Qiu Gao, the vulva out of white translucent mucus, can be pulled into 7-8 centimeters filament by hand. The estrus period lasts for 18 hours and lasts 12 to 22 hours. Ovulation occurs 10 to 15 hours after the estrus is over. Therefore, the suitable mating time of the cow is: if the morning heat is estrus, it will be bred from 8 to 10 p.m. on the same day, and will be supplemented once in the morning from 7 to 8 o'clock in the morning; if the oestrus occurs in the afternoon, the breeding will be carried out the next morning and the afternoon or evening will be used once. Third, induced cow estrus ovulation The cow has normal genitalia but does not have estrus or misses the estrus period. It can use urine of pregnant women, estrodrol triadogens, etc. to induce ovulation of estrus in cows, and timely fertilize and prevent pregnancy. IV Carefully feeding pregnant cows Pregnant cows must meet their own and fetal nutritional needs, so to provide high-quality compound feed, the formula is corn 30%, soybean cake 20%, rice 15%, cottonseed cake 15%, rapeseed cake 5%, rice bran 15%, moderate bone meal and salt. 1 to 2 kilograms of concentrate per day, enough green feed and ammoniated feed. Timing, feeding less, drinking warm water. Sunny days choose to grazing where the leewards are sunny and enhance the body movement of the cattle. Fifth, prevent miscarriage and protect the mother and child safe In the middle of pregnancy, the cattle should gradually reduce the intensity of exercise, and it is strictly forbidden to draw cold whip, perform urgency, turn sharp bends, and make heavy duty. One month before the birth, paralysis was stopped. If the cow is pregnant, the vagina will flow out of mucous, and constantly look back at the abdomen, and it will cause restlessness; late breast enlargement, oscillating urinary frequency posture, abdominal pain is obvious, fetal movement stop is abortion omen, and timely treatment, available progesterone 0.5 ~ 1 g Intramuscular injection, once daily, for 4 to 6 days. Due to the lack of exercise, the cow can be subcutaneously injected with 60-100 units of oxytocin or 10-20 mg of ethylene-estradiol, and the effect of oxytocin production is better. Food Ingredients,Food Additives Ingredients,Natural Sweetener Food Ingredients,Nutritional Food Ingredients Nanjing Sunshine Biotech Co., Ltd , http://www.sunshine-bio.com