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이규호,김덕교 ( K . H . Lee,D . K . Kim ) 한국축산학회 1974 한국축산학회지 Vol.16 No.4
To serve as a basic information in using domestic fish meals instead of imported one in chick ration, two feeding trials were carried out with broilers for eight weeks each. 1. The content of crude protein and essential and non-essential amino acids except valine in the foreign fish meal was superior to that of ten kinds of domestic fishes.(Harengula zunasi, Chasmichthys gulosus, Clupanodon punctatus, Arctoscopus japonicus, lagre anchovy, medium anchovy, small anchovy, anchovy heads, fish heads and mixed fishes). 2. No statistical differences were noted among 5 domestic fishes (Harengula zunasi, Chasmichthys gulosus, medium anchovy, small anchovy and mixed fishes), 7 domestic fish meals (Arctoscopus japonicus, Harengula zunasi, Engraulis japonica, Ammodytes personatus, Trichiurus haumela, Monacanthus cirrhifer and small Alaska pollack.) and imported fish meal in weight gain, feed consumption and feed efficiency. It was thus concluded that all of the domestic fishes and fish meals used in these experiments were just as effective as the imported one when used to supply comparable amounts of protein in broiler rations.
구능완,김덕교 ( N . W . Koo,D . K . Kim ) 한국축산학회 1973 한국축산학회지 Vol.15 No.4
Twenty weaning pigs of Landrace breed were used to study the effect of level of dried sweet potato pulp (0, 10, 30, 50%) as a replacement for grains and brans in rations fed to pigs from weaning to market weight on the drylot performance, carcass quality and feed cost per ㎏ gain. 1. Average daily gain for 0, 10, 30 and 50% level of sweet potato pulp were 711, 701, 684 and 670g respectively and tended to decrease as the level of sweet potato pulp in the ration increased. However there were no statistical differences Feed required per ㎏ gain were 4.02, 4.22, 4.24 and 4.35㎏, respectively which tended to increase as the sweet potato pulp level increased. 2. As the level of sweet potato pulp increased, the carcass became softer with tender lard and loin eye muscle area and dressing percentage tended to decrease. 3. Coeffecients of apparent digestibility of sweet potato pulp were; for dry matter, 99%; crude protein, 60%; crude fat, 16%; nitrogen free extract, 97% and crude fiber 72% and its total digestible nutrient content was found to de 72%. 4. Feed cost per ㎏ gain were 117, 118, 111 and 101 won, respectively and it was the cheapest at the highest level of sweet potato pulp used. 5. Above results indicated that up to 30∼50% level of sweet potato pulp in the ration allowed satisfactory gains, feed efficiency, carcass quality and feed cost per ㎏ gain.
육성기 사료의 양적 제한급여가 육용종계의 발육 및 산란성에 미치는 영향
이규호,김덕교 ( K . H . Lee,D . K . Kim ) 한국축산학회 1974 한국축산학회지 Vol.16 No.4
The effect of feed restriction during the rearing period on sexual maturity, performance in the laying house and economy was studied using 305 birds of broiler breeder pullet. During the rearing period(7∼24 weeks of age) feed was offered 80%, 75%, 70%, and 65% of feed consumption of full fed group. From 25 weeks of age all groups were fed ad libitum The results obtained are summarized as follows: 1. Body weight of 65% restricted group at 24 weeks of age was 73% of that of ad libitum group. At 45 weeks of age it was 85% of that of full fed group and not yet recovered completely. 2. Feed consumption of restricted groups from 25 to 50 weeks of age was somewhat more that of control group. However, there was no significant difference. 3. The degree of sexual maturity examined by weight of reproductive organ, length of fallopian tube and weight of comb and wattle at 21 weeks of age was extremely delayed with groups of feed restriction. The skeleton, however, almost equally developed between ad libitum and restricted groups. 4. The first egg production (days to 50% egg production) was delayed 1∼2 weeks with the restricted feeding. 5. Hen-day egg production was improved as the degree of restriction became intensive and 65% restricted group had the best result. The production of egg over 53g(hatchable egg) showed the same tendency. 6. Egg size was not affected by treatment. 7. Feed cost required for lkg egg production was the highest with the ad libitunz group and was decreased as the degree of feed restriction increased. The same tendency was obtained for the feed cost for 1 hatchable egg (over53g) Summarizing all of the da-ta, it was suggested that in broiler breeder the feed restriction should be below 65% of ad libitum group during the rearing period(7∼24 weeks of age), and the body weight at 24 weeks of age should be kept at the level of less than 70% of the control in order to get better performance during the laying period.