성계에 대한 Ca 공급제의 종류에 따른 사료가치 비교

육종융 ( C Y Yuk ) 한국축산학회 1968 한국축산학회지 Vol.10 No.1

The present experiment was conducted over fifty days to determine the effect of supplementing oyster shell flour, limestone flour, meretrix, and commercial marine shell flour, as a source of calcium in the feed upon egg production and egg shell quality of white Leghorn laying hens. The results obtained are as follows: (1) The amount of feed consumed was larger for limestone and commercial marine shell than for others. The hens in the two lots appeared to have consumed more feed to meet the calcium requirement physiologically because the limestone and commercial marine shell were low in their calcium contents. (2) The decrease in body weight was observed for each of the four treatments. The rate of egg production was somewhat low for limestone lot, but this was statistically insignificant. No significant differences among the; four treatments were observed for egg weight. (3) The thickness and breaking strength of egg shell were significantly poor for limestone lot than for other lots. (p$lt;0.01). The correlation between shell thickness and breakness and breaking strength was high (r=0.85). (4) The calcium content of blood serum and of femur was relatively high for meretrix lot, and was low for limestone lot. But none of the differences in calcium contents among the four treatments were statistically significant. The calcium content of blood serum was significantly correlated with rate of egg production (r=0.66), and that of femur was significantly correlated with egg shell thickness (r=-0.60). The determination of ash content of femur showed no significant differences among the four treatments, although the ash content of femur was relatively high for commercial marine shell lot and was low for Limestone lot. (5) The breaking strength of femur showed no significant differences among the four treatments, although the meretrix lot showed considerably high value of ash content. The breaking strength of femur was highly correlated with its ash content (r=0.76, p$lt;0.01), but was only slightly correlated with its calcium content (r=0.44, p$lt;0.05). (6) No significant differences among the four treatments were observed for production cost and net profit per egg. although the limestone lot was somewhat inferior to others due to its low rate of egg production and to large amount of feed consumed.

젖소의 주조사료로서 볏짚 , 야건초 및 옥수수 엔실레지의 가치

육종융 ( C . Y . Yuk ) 한국축산학회 1973 한국축산학회지 Vol.15 No.4

This study was conducted to compare the rice straw. native grass hay and corn silage as a main roughage on the feed intake, milk production and changes of body weight of milking cows using 3×3 Latin square design. The results obtained are as follows; 1. Dry matter intake was less in rice straw feeding than that of native grass hay and corn silage feeding. This difference was attributed to amount intaken of roug page. But the difference in dry matter intake was not significant. 2. Milk yield of rice straw feeding tended to less yield than that of native grass hay and corn silage feeding, but the difference w-at not significant. While 4% FCM yield of rice straw feeding was highly significantly less than that of native grass hay and corn silage feeding. Butter fat content of corn silage feeding tended to lower than that of rice straw and native grass hay feeding. But the difference was not significant. 3. Body weight was increased in treatment of native grass hay feeding by 20㎏ in total of 3 cows, while any change was not observed in the other treatments. But the difference was not significant.

가축분의 사료화를 위한 연구 8 . 한우에 대한 건조계분의 사료가치시험

육종융,유문일,정천용,한인규 ( Chong Y . Yuk,Moon I . Yoo,Chun Y . Chung,In K . Han ) 한국축산학회 1978 한국축산학회지 Vol.20 No.5

This experiment was conducted to determine the substitution level of dried hens manure (DPM) for wheat bran in fattening ration for Korean native steer. Twenty yearling steers, weighing on average of 245 ㎏ were randomly alloted to four treatment groups according to the level of DHM. Treatments consisted of four rations constraining 0, 10, and 20% DHM substituted for wheat bran and 30% DHM substitute for wheat bran (20%), corn (6%) and soybean oil meal (4%). The results obtained are summarized as follows : 1. Average daily gains of DHM 0, 10, 20 and 30% fed groups were 0.95, 0.90, 0.89 and 0.88 ㎏, respectively. There was no significant difference among treatments. Data revealed that the average daily gain decreased slightly as the level of DHM substituted increased. Dressing percentage was not affected by the different level of DHM feeding. 2. Dry matter intakes of DHM 1, 10, 20 and 30% groups were 7.15, 7.21, 7.41, and 7.63, respectively. Daily dry matter intake increased as the substituted level of DHM in ration increased. 3. When DHM cost was considered, to be zero won per ㎏ feed cost required per ㎏ of body weight gain was decreased as the level of DHM in ration increase. When DHM cost was estimated to be 30 won per ㎏, feed cost required per ㎏ of weight gain was similar for DHM 0 and 30%, and slightly higher for DHM 10 and 20% groups than for DHM 0 and 30% groups Based upon the dats concerning body weight gain and economic analysis, it is concluded that inclusion of DHM may be practiced upto 30% in fattening ration for Korean native steer and the price of DHM per ㎏ should be less than 30 won in any case.

가축분의 사료화를 위한 연구 7 . 부로일러 사료에 있어서 건조계분에 의한 강부류 및 박류 대치시험

육종융,한인규,이택원,정정수 ( Chong Y . Yuk,In K . Han,Tack W . Lee,Chung S . Chung ) 한국축산학회 1978 한국축산학회지 Vol.20 No.5

This experiment was conducted to determine the using level of dried poultry waste(DPW) in broiler rations, employing 360 broiler chicks of Shaver strain for 8 week. In this experiment, 0, 4, 8, 12% of wheat bran and 0, 3, 6, 9% of sesame oil meal were replaced by DPW. The results obtained are summarized as follows: 1. In the body weight gains of chicks, there were no statistical differences among treatments. Up to 12% wheat bran and 9 % sesame oil meal could be replaced by DPW with no adverse effect on the growth rate. 2. There were no statistical differences in feed consumption and feed efficiency among treatments. 3. No statistical differences were found in nutrients utilizability among treatments. 4. Utilizability of dry matter and total carbohydrate of DPW itself were low as 30.34% and 22.32%, respectively. It is concluded that less than 8 % of wheat bran or 6 % of sesame oil meal could be replaced by DPW in the rations of broiler-type chick.

한국 소 비육에 있어서 사료 급여방식이 비육효과에 미치는 영향

육종융,김진욱 ( Chong Yung Yuk,Jin Uk Kim ) 한국축산학회 1975 한국축산학회지 Vol.17 No.3

Six Korean yearling bulls were employed in two experiments to study the effect of feeding methods, i.e., feeding concentrates and Gutted native grass hay separately (control feeds) or mixed together (test feeds). The double-reversal design was used in this experiment. The results obtained were summarized as follow: 1. Amount of hay intake in test group was larger than that in control group. but the difference was not significant. 2. Body weight gains of the bulls fed control feeds were heavier than that of test feeds. The average daily gain was 1.21㎏ for control group and 1.03㎏ for test group, but the difference was not statistically significant. 3. During the two experimental periods, bulls of control group consumed less DCP and TDN for 1㎏ body weight gain than that of test group. 4. The height of hip cross and length of heart girth of control bulls were longer than that of test bulls. Withers height and body length of test bulls, however, were longer than that of control bulls.

가축분의 사료화를 위한 연구 10. 가축분의 가소화성분 측정에 관한 연구

육종융,한인규,정정수,유문일,이규호,정인걸,하종규,이탁원 ( Chong Y . Yuk,In k Han,Chung S . Chung,Moon I . Yoo,Ku H . Chung,In K . Chung,Jong K . Ha,Tack W . Lee ) 한국축산학회 1978 한국축산학회지 Vol.20 No.5

유축농업적 축산의 진흥

육종융,Yuk, Jong-Yung 한국과학기술단체총연합회 1978 과학과 기술 Vol.11 No.3

가축분의 사료화를 위한 연구 9 . 수집계절 , 수집방법 및 건조방법이 계분의 영양소함량에 미치는 영향

이택원,육종융,한인규,정정수,유문일,정천용 ( Tack W . Lee,Chong Y . Yuk,In K . Han,Chung S . Chung,Moon I . Yoo,Chun Y . Chung ) 한국축산학회 1978 한국축산학회지 Vol.20 No.5

This experiment was conducted to investigate the changes in chemical composition of dehydrated poultry waste (DPW) as affected by season (spring, summer, autumn, winter), collection intervals (12, 24, 36, 48 hours) and drying process (oven dry, oven dry often solar exposure for I-day, oven dry after solar exposure for 2-day, oven dry after solar exposure for 3-day, oven dry after solar exposure for 4-day). The waste was collected from laying hens of White Leghorn strain at Livestock Experiment Station and College of Agriculture, Seoul National University. Fresh hens excreta was dried in drying even at 80℃ for 24 hours after various preliminary treatment as originally designed. The results obtained are summarized as follows: 1. Crude protein content of dries poultry waste collected in winter (38.40%) way much higher than that of spring (28.63%), autumn (24.91%) and summer (22.20%). However, no definite; trend by season was found in the contents of crude fat, crude fiber, crude ash and nitrogen free extract (NFE). 2. Although the collection intervals had no effect on the contents of crude fat. crude fiber, crude ash and NFE, the crude protein content of DPW collected at 12 hours interval (30.15%) showed the higher than the at 24 hours (29.62%), 36 hours (27.70%), or 48 hours (27.20%). 3. It was found that the crude protein content of DPW dried in drying oven at 80℃ was analyzed to be 34.45% and that of DPW dried in oven after solar exposure for 1 day, 2 days, 3 days and 4 days was found to be 30.19%, 28.32%, 27.75% respectively. Drying process had no effect on the other chemical components of DPW studies. 4. Present data indicated that the content of crude protein in DPW could best be retained when fresh poultry waste was dried in oven at 80℃ regardless of collection intervals. It was also apparent that nitrogen loss was proportional to the length of collection intervals, even if same method of drying process was used. It appeared that the content of crude protein and fat was more easily affected by season, collection interval and dying method than the other chemical components.

제요인이 유우의 비유량과 유지율에 미치는 영향에 관한 연구 제 1 보 사료내 조섬유 수준이 유우의 유생산 및 유지율에 미치는 영향

김진욱,육종융 ( Jin Uk Kim,Chong Yung Yuk ) 한국축산학회 1976 한국축산학회지 Vol.18 No.1

The effects of dietary fiber level on milk yield, milk fat content, and live weight were studied by using 3×3 Latin square experimental design. Three different dietary fiber levels have been tested with the follow ing dietary fiber content in the formula (dry matter basis): Lot A, 23% ; Lot B, 16% ; Lot C, 7%. The results obtained are as follows: 1. Dry matter intake per day during the experimental period among three treatnents showed little difference. 2. The animals in Lot C tended to give higher milk yield than those in Lot A or B, but the difference is not significant statistically. 3. The cows in Lot A gave the milk of higher fat content than those is Lot B or C, of which difference is statistically significant at 5% level. 4. Cows did not show any difference in the solids-eat-fat content of the milk they produced. 5. Animals showed significant differences in live weight increase in accordance with the different level of dietary fiber. The cows receiving the 16% fiber diet gave the most weight increase, followed by the animals in Lot C (Significant at 5% level).

면양에 대한 국산옥수수 펠릿트의 성장능력 , 소화율 및 제1위내 VFA조성에 미치는 영향

최윤재,육종융,한인규,류연선,배동호 ( Y . J . Choi,C . Y . Yuk,I . K . Han,Y . S . Ryu,D . H . Bae ) 한국축산학회 1982 한국축산학회지 Vol.24 No.4

This experiment was conducted for a period of 140 days to evaluate feeding values, digestibility and volatile fatty acid (VFA) composition of ruminal juice of whole corn crop pellet and corn ear with husk pellet through feeding trial, digestibility experiment and the determination of ruminal pH and volatile fatty acid pattern for lamb. Twelve male lambs weighing 30㎏ in initial body weight were divided into 4 treatments i.e. control, whole corn crop pellet, corn ear with husk pellet and rice straw pellet group. The results obtained are summarized as follows. 1. The body weight gain of lambs fed whole corn crop pellet (1,254.8g) and corn ear with husk pellet group (1,253.9g) was higher than that of rice straw pellet fed group (1,194.3g) or control group. And control group (974.7g) was the lowest. The body weight gain of whole corn crop pellet group was significantly (p$lt;0.05) heavier than that of control group. While, there were no significant differences among the other treatments. Daily dry matter consumption and feed efficiency showed the same tendency as the body weight gain. 2. Digestibilities of the dry matter, crude protein, crude fiber and nitrogen free extract (NFE) in the corn pellets were lower than those in the commercial formula feed, but were higher or slightly lower than those in hay or rice straw pellet. While, crude fat digestibilities of corn pellets were the highest among treatments. Digestible crude protein contents of the whole com crop pellet and corn ear with husk pellet were found to be 5.86 and 6.59%, respectively. Total digestible nutrients (TDN) values of the whole corn crop pellet (62.74%) and corn ear with husk pellet (69.00%) were lower than that of commercial formula feed (72.26%), but higher than that of hay (59.61%) by 3-9%. 3. The changes in ruminal VFA production in molar % were characterized by 4-5% decrease in acetate production and 3-4% and 2-3% increases in propionate and butyrate production during 20 days after feeding the experimental feed, but were not affected by treatments. Tonal VFA production of corn pellet groups was higher than that of rice straw pellet or control group. The ruminal pH was decreased from 0 day to 10 days after feeding experimental diets, but was not changed thereafter regardless of treatments. According to the results of obtained from the present studies, it could be suggested that the use of whole corn crop pellet and corn ear with husk pellet may be used as a combined feed of roughage and grains for ruminant animals and will also help to contribute the use of self produced feedsruffs.