Artificially induced lactation technology is to increase the concentrations of these hormones in dairy cows by injecting estrogen and progesterone to promote the growth and development of mammary glands and acinus systems. After the growth and development are sufficient, routine milking is started. The method was to inject estradiol benzoate subcutaneously into the shoulder of dry cows at 7 am and 17:2 pm every day; at a dose of 0.05 mg per kilogram of body weight, with each injection of progesterone per kilogram of body weight (pregnancy). Ketone) 0.125 mg, continuous injection of 5-7 days. The second day after discontinuation, reserpine injections were started. One injection every other day, 2.5 mg per injection, and 4 consecutive injections. Treatment of cattle from the beginning of treatment on the 12th day, daily massage with warm water rubbed 2-3 times, after each massage, milking.
According to Xue Huiwen of Gansu Agricultural University, artificially induced milking cows have a milk production time of 125-364 days, and the highest milk yield of 305 days can reach 3,888 kilograms, and the peak daily milk production is about 20 kilograms.
This technology uses exogenous hormones to treat dairy cows during dry period. The individual differences in production are large, and the milk production varies greatly after artificial induction. Some of them are close to or reach the output of natural lactation, and the success rate of induced sucking milk is inconsistent.
About 20% of cows induce lactation failure, so this technique should be treated correctly. In addition, some cows may develop ovarian cysts after inducing lactation and show symptoms of Muxiong. Attention should be paid to prevention.
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