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Survey on feeding and reproductive traits of Korean native cattle introduced to Cheju Island from mainland

Kang, S.W.; Park, N.G.; Ko, S.B.; Chung, S.B.; Oh, Y.C.

Korean Journal of Animal Nutrition and Feedstuffs 20(6): 517-528

1996


Accession: 009990640

This survey was carried out to investigate the feeding and reproductive traits of Korean native cattle (KNC) raised at government research farms, individual and large commercial farms in Cheju island, in order to increase the beef production and reproductive performance. The survey was performed either by visit to the farm or by questionnaire. Many KNC farms responded that the future of the KNC enterprise in Chou island will be very grim, price stabilization or import control of beef is needed to reduce the calf production cost and an ideal raising herd size will be about 50 heads per farm The management type of all KNC farm was mixed with a mandarin orange garden. Average herd size per farm was 8.9 heads, land size was 7.7 ha on average with 2.4 ha of crop or orchard farming, 1.1 ha of permanent pasture and 4.2 ha of natural pasture including forest. Average size of livestock barn was 53.9 m-2 per farm and 6.2 m-2 per head. KNC were raised in the individual cattle barn and mostly fed home grown feed such as hay and silage during the winter season from Dec. to Apr., On the other hand, during the summer season, they were grazed as the breeding herd on the pasture of village cooperative ranches. which does not have any facilities for concentrate feeding and artificial insemination. So 90% of farm raised the cattle without concentrate feeding and 80% of farm practiced natural mating service. Average daily gain of the present generation of the introduced K.NC during the growing (6 apprx 12 month) and puberty (13 apprx 18 month) showed 0.303 and 0.571 kg, respectively, and they were lower than the KNC growth standard of main land by 0.524 and 0.357 kg. respectively. The survival rate for 12 months, from the introduced age to the first insemination(age, 18 month; body weight 269 kg), was 95% and the occurrence rate of the reproductive disorder was 23.7%. Calving interval of dam, 24 month body weight and puberty age, in which KNC fed concentrate at 1% of their apparent body weight, were 12.5 month, 357 kg and 15 month age, respectively and all of these were improved by 16.1 to 48.8% than all the reproductive traits of the cattle received no other feed except grass on the pasture; 14.9 month, 239.9 kg and 19 month age. respectively. According to the above results it may be concluded that KNC in Chou island have to be raised throughout the year at village cooperative ranches to increase the international competition. However. it is necessary to enhance the herd size up to 50 heads per farm to be a specialized occupation, to use the pasture of the rotational grazing and to set up the facilities for artificial insemination and the feed barn for concentrate feeding to improve the growth and reproductive performance.

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