선형계획법에 의한 부로일러의 경제적 영양소 요구량에 관한 연구

이영철,하서현,고용균 ( Yong Chull Rhee,Seo Hyun Ha,Yong Gyun Goh ) 한국축산학회 1980 한국축산학회지 Vol.22 No.5

Two experiments were conducted to investigate the effect of feeding different levels of metabolizable energy and protein diets on growth performances, body composition and gross income of broiler chicks. The results obtained were as follows ; 1. Metabolizable energy level of diet was significantly influenced on body weight and feed efficiency. As the Metabolizable energy level of diet decreased the body weight and feed efficiency decreased proportionately. 2. Male chicks have a higher progressing tendency on body weight and feed efficiency than female chicks. Also, the body weight and feed efficiency were greatly influenced especially by the nutrient level of starter diet. (0-3 weeks) 3. When chicks were fed diet containing high energy value the body fat and abdominal fat pad size of chicks increased. 4. The highest. gross income was marked in the metabolizable energy 3200㎉ treatment of male chicks and in the 3000 ㎉ treatment of female chicks, but the high energy level of diet was not always greater in gross income than low energy level of diet.

우모분사료가 부로일러 증체에 미치는 영향 ( 제2보 )

이영철 ( Yong Chull Rhee ) 한국축산학회 1972 한국축산학회지 Vol.14 No.1

This study was carried out to determine the possibility of using large amount of feather meal in broiler diets and the availability of amino acid unbalanced diets on broiler chicks. The results obtained are summarized as follows: 1. The 8% feather meal diet by the partial replacement of fish meal and corn starch was not inferior to control diet. However, 16% feather meal diet fully substituted for fish meal and some portion of corn starch was proved to be remarkable decrease the growth rate remarkably. 2. Feed consumption and protein digestibility decreased significantly as amino acid unbalanced ration were fed. But amino acid unbalnced diet may be available as adquately as the control diet, if the limited amino acid (lysine, methionine) were added in broielr diets.

닭에 있어서 비단백태질소화합물의 이용성 연구

이영철 ( Yong Chull Rhee ),하서현 ( Seo Hyun Ha ) 한국축산학회 1972 한국축산학회지 Vol.14 No.2

Three experiments were carried out to determine the effect of supplementing chicken diets with non-protein nitrogen as a partial substitute for the protein. The results obtained are summarized as follows: 1. On the day old chick, ten diets supplemented with non-protein nitrogen (NPN) were ineffected and decreased the growth rate compared to the 20% protein control diet. 2. On the 5 weeks old chick, when DAC and urea were fed to supply 3% and 5% protein equivalent (N×6.25) in a 13% and 17% protein diet which met all the amino acid requirements, growth rate and feed efficiency were improved compared to the same diet without the NPN source. 3. The NPN supplement diets decreased egg production compared to the control diet and happened to show more decreased phenomena as the NPN supplement was increased. Especially, urea additive diets produced less eggs than that of DAC.

환경온도와 우모피복도가 닭의 에너지대사에 미치는 영향 1 . 절식시 열발생량

고용균(Yong Gyun Goh),이영철(Yong Chull Rhee) 한국축산학회 1987 한국축산학회지 Vol.29 No.9

Effect of environmental temperature and defeathering (DF) on the fasting heat production (FHP) in white Hisex cockerels was examined at 5, 15, 25 and 35℃ of temperature and 0, 50 and 100% defeathering conditions. Series of experiment were carried out with three open-circuit respiration chamber. The results can be summarized as follows: 1. FHP had negative correlation with the environmental temperature (ET), therefore, FHP of cockerels decreased continually with increasing ET. The relationships between FHP (Y) and ET (X) expressed as a linear regression equation were: Control treatment (0% DF); Y=-1,167X + 100.41 (r=0.9779), 50% DF treatment; Y=-1.429X + 109.90 (r=0.9968), 100% DF treatment; Y=-2.887X + 165.31 (r=9717). 2. FHP of the cockerels was also increased (p$lt;.01) with increasing DF level, which were 105.5%increase in 50% DF treatment and 139.5% increase in 100% DF treatment compared to control treatment (0% DF treatment). The tendency of increasing FHP due to DF level (50 and 100% DF) was remarkable especially in low temperature treatment (15 and 25℃). However, there was no effect of the DF level of cookerels when ET increased with 35℃, which of FHP ranged 58.3-60.6 Kca1/BW^(0.75)/day.

환경온도와 우모피복도가 닭의 에너지대사에 미치는 영향 2 . 사료급여시의 에너지 대사

고용균(Yong Gyun Goh),고종태(Jong Tae Goh),이영철(Yong Chull Rhee) 한국축산학회 1987 한국축산학회지 Vol.29 No.10

Effect of environmental temperature and defeathering (DF) on the energy metabolism of cockerels was examined and results obtained are as following. 1. Environmental temperature (ET) affected heat production (HP) during feeding condition. Under 25℃ ET, HP per ㎏ metabolic body weight (MEW) were decreased with increasing ET, which is showing 146.4, 131.5, 115.9 and 88.8 Kcal under S, 15, 25 and 35℃ ET, respectively. 2. Mean HP per ㎏ MEW were respectively 120.6, 131.2 and 188.0 Kcal for 0, 50 and 100% DF treatment which is revealing the increasing HP with increasing DF level. 3. Metabolizable energy requirement for maintenance (MEm), which were 143.3, 120.6, 111.0 and 86.7 Kcal/MBW with respective ET of 5, 15, 25 and 35℃, were decreased with increasing ET. There were increased in MEm with increasing DF level under 25oC. There were 115.4, 126.6 and 192.1 Kcal for cockerels with DF level of 0, 50 and 100, respectively. However, no such difference was observed under 35℃ ET. 4. No effect of ET on Net availability of metabolizable energy (NAME) was observed. However, in average, the marginal decrease of NAME which were 66.6, 64.5 and 57.6% was shown with increasing level of DF, which respectively were 0, 50 and 100%. Effect of DF level was not observed exceptic ally under 35℃ ET.

발효계분이 부로일러의 증체사료효율 및 육질에 미치는 영향

김춘수,이영철 ( Chun Soo Kim,Yong Chull Rhee ) 한국축산학회 1977 한국축산학회지 Vol.19 No.3

In order to evaluate the nutritive value of fermented dehydrated poultry waste(FDPW), feeding and metabolism trial were conducted with a total of 200 broiler chicks for a period of 6 weeks. The results obtained are summarized as follows: 1. In the proximate composition of FDPW, contents of crude protein, crude finer, crude ash and NFE were 28.5, 4.20, 8.18, 16.88, and 32.41 percent respectively. The ME value of FDPW revealed 1743 ㎉ per kilogram which is much higher than that of DPW. 2. Although there were no statistical difference in the body weight gain among treatments weight gain achieved by the group fed diets of 10% substitution of FDPW was slightly better than others. The amount of feed consumption were slightly higher for FDPW included groups than for control group. This trend means that FDPW can be utilized safely by the amount of 10 percent as a broiler feed ingredient. 3. Althought no difference was detected in nutrient utilizability, nitrogen retention was slightly improved when FDPW were fed at the level of 10 to 20 percent in comparison with the same levels of DPW included group. 4. Analytical data revealed that the contents of crude protein and crude fat of the poultry meat were 20.14-21.98 and 1.45-2.73 percent. Especially crude fat content of the poultry meat increased when the birds were fed FDPW and DPW include diets whereas crude protein content among treatments showed indiscriminate value, and no difference were observed among treatments in the taste of poultry meat as a result of panel test.

Ahemeral light - dark cycle 이 닭의 에너지대사에 미치는 영향

송영한(Young Han Song),이영철(Yong Chull Rhee) 한국축산학회 1988 한국축산학회지 Vol.30 No.2

Experiments were carried out to determine the effects of the light-dark cycle on weight gain, feed conversion, heat production and energy retention by 9-16 week-old cockerels. Light(L)-dark(D) regimes used were OL-24D, 8L-16D, 12L-12D, 16L-8D, 24L-8D, 13L-8D, 19L-8D and 22L-8D, and the summarized results are as follows. 1. Fasting heat production (FHP) was higher during the light cycle than the dark cycle and not affected by the length of the cycle-21, 24, 27 or 30 hours. 2. The average FHP/Kg^(0.75)/24 hours were 72.7, 74.8, 78.7, 81.8, 80.1, 78.3, 76.3, and 76.4 Kcal in cockerels raised under OL-24D, 8L-16D, 12L-12D, 16L-8D, 24L-0D, 13L-8D, 19L-8D and 22L-8D, respectively`. 3. Cockerels raised under the 19L-8D regimes tended to show higher (p$lt;0.05) body weight gain and better (P$lt;0.05) feed conversion than those raised under the other regimes. 4. The metabolizable energy requirement for maintenance (MEm) was lower in cockerels raised under 16L8D, 19L-8D and 22L-8D than those raised under 13L-8D and NAME was highest in cockerels raised under 19L-8D.

저질산야초의 (低質山野草) 사료가치 증진시험 Ⅱ. 암모니아처리 산야초가 산양의 성장율과 경제성에 미치는 영향

홍병주(Byung Ju Hong),고용균(Yong Gyun Goh),이영철(Yong Chull Rhee) 한국축산학회 1984 한국축산학회지 Vol.26 No.3

A performance and digestibility trials were conducted to evaluate the feeding value of ammoniated (3% dry basis), urea treated (2% dry basis) and untreated wild grass by goats. The results obtained were summarized as follows: 1. Total digestible nutrients value of wild grass which were treated by NH₃, urea and untreated were 56.8% 46.5% and 47.1% respectively (P$lt;0.01). 2. NHS treated wild grass (3% dry basis) had a higher dry matter digestibility (55.6%) and higher NDF digestibility (62.4%) than all the other treatments. 3. Daily body gain and dry matter intake of goats fed NH₃ treated grass were greater than either fed untreated and urea-treated grass. That is, daily body gain and dry matter (DM) intake were 112g and 0.71㎏, those of urea-treated were 88g and 0.52㎏, and those of untreated were 82g and 0.47㎏, respectively. 4. Cost of the grass used in this trial based on the manufacturing price: Untreated grass - 85￦ per ㎏; Ureatreated grass - 91￦ per ㎏; NH₃ treated grass - 103￦ per ㎏. However, when the NH₃ treated grass was fed by the goats, the feed cost per kilogram gain was the cheapest of all the other treatments.

저질산야초의 (低質山野草) 사료가치 증진시험 Ⅰ. 재료의 수분함량과 암모니아 첨가수준이 일반성분 및 건물소화율에 미치는 영향

홍병주(Byung Ju Hong),고용균(Yong Gyun Goh),이영철(Yong Chull Rhee) 한국축산학회 1984 한국축산학회지 Vol.26 No.3

This study was conducted to evaluate the nutritive value of wild grass treated with ammonia and to determine the effects of ammonia application rate, grass moisture content, treatment duration and ammoniation source on the chemical composition and fiber digestibility. The results obtained were summarized as follows: 1. The concentration of total nitrogen of wild grass treated with ammonia was increased with increasing the NH₃ application rate and moisture content of wild grass (P$lt;0.01). But, the nitrogen of urea-treated grass was not affected by the moisture content proportionately. 2. The NDF and ADF content of wild grass treated NH₃ and urea were not affected by the moisture content and application rate 3. Although the urea-treated grass was not higher in the in vitro dry matter digestibility (IVDMD) than untreated. But, the ammoniation grass significantly improved the IVDMD at the level of 3.0% especially. Also, significant increases were obtained at the level of 5,7% (P $lt; 0.01). 4. In vitro dry matter digestibility (IVDMD) was greatly affected by the treatment duration. More than 3 weeks in treatment duration showed significantly (P$lt;0.01) higher in vitro dry matter digestibility (IVDMD) compared to one week duration. And no significant difference among more than 3 weeks duration were observed. 5. The 30% moisture content in NH₃ grass showed highest IVDMD.