Establishment of the technique of whole year grazing of Japanese black cow in simple barn (the second report)
2019
Sasaki, K. (Fukui Prefectural Livestock Experiment Station (Japan)) | Kawamori, N.
Japanese Black caws were grazed whole year in the simple barn using a greenhouse, investigating growth and reproductive performance of cows, and growth of their calves. As a result of deliveries of calves, calving and cultivating calves were good in winter. Although this Japanese Black cows were ranged from 60 kg to 100 kg in the body weight, this did not affect their breeding performance since all Japanese Black cows were fertirized(4/4) and the average number of times of artificial insemination was 1.5±0.87 times. The weights of three calves were raised in the range of the standard growth curve of Japanese black cow, but one of calves have developed poorly due to stealing by the cow after eight months old. Dairy gains, caiculated as weight/days of age, of 3 calves at the point of sales on the calves market were 1.0kg/day(steer), 1.0kg/day(heifer) and 0.7kg/day(heifer). The selling prices of the first tow calves on the (1 steer, 1 heifer) market were exceeded the average price of the market and the rest (1 heifer) fell below the average.
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