양계산업 안정의 길잡이가 되어 주기를

지설하 대한양계협회 1983 월간 양계 Vol.15 No.2

수급안정과 가축능력개량으로 질적 향상 유도-양계협회 통해 생산조절 유도 예정

지설하 대한양계협회 1986 월간 양계 Vol.18 No.3

장기적이고 일괄성있는 발전방안 계획 수립 위해 양계인 단합해야

지설하 대한양계협회 1982 월간 양계 Vol.14 No.10

도입한 돼지동결정액의 정자활동과 번식능력

지설하,조윤연,임경순,박태진,상병찬,김호중,김인철,노진식 한국축산학회 1984 한국축산학회지 Vol.26 No.8

This experiment was carried out to examine the effects of the imported boar frozen semen on the motility of the spermatozoa and reproductive performance. The fertility and reproductive performance were obtained on the basis of the 48 heads of Landrace, Hampshire, Large Yorkshire and Duroc sows inseminated with 96 tube boar frozen semen at National Animal Breeding Institute from 1983 to 1984. The results obtained are summarized as follows: 1. The average livability and motility of the spermatozoa were 54.3% and 24.8^(+++) after thawed of boar frozen semen, and Landrace was superior with 56.3% and 27.3^(+++), respectively. 2. The average gestation length was 114.3 days, and was shorter with 113.5 days in Hampshire. The conception and parturition rate were 16.7 and 12.5% with pregnancy and parturition of 8 and 6 heads of the 48 sows inseminated with frozen-thawed semen, respectively. And the conception rate was higher with 25.0% in Hampshire, and the parturition rate was superior with 16.7% in Hampshire and Large Yorkshire. 3. Average litter size at birth, 21 days and weaning were 7.7, 6.7 and 6.5 heads and Hampshire was higher with 11.5, 9.5 and 9.5 heads, respectively. 4. Average pig weight at birth, 21 days and weaning were 1.20, 5.45 and 19.25 Kg and Duroc was heavier with 1.39, 6.07 and 21.60 Kg, respectively.

새천년 낙농산업의 해결과제

지설하 한국낙농육우협회 2000 낙농·육우 Vol.20 No.1

자급사료 생산기술 향상을 위한 연구방안

지설하 한국축산학회 1978 한국축산학회지 Vol.20 No.5

에너지와 蛋白質 供給源에 依한 反芻胃內 營養素 利用性 및 反芻胃微生物에 關한 硏究

지설하,이상철,정하연 충남대학교 농업과학연구소 1996 농업과학연구 Vol.23 No.2

This study was conducted to examine the effects of dietary energy and protein sources on the rumen microbial population of sheep. The results obtained were summarized as the follows; 1. Ruminal pH was highest in sheep fed the diet rapidly degraded in the rumen(F-F) as a energy (barley plus beet pulp) and protein source (rapeseed meal), and lowest in the diet (F-S) of rapidly degradable energy source plus slowly degradable protein source (corn gluten meal + cotton seed meal) without affecting by postfeeding time. 2. Ruminal ammonia concentration was higher in corn (slowly degradable) for energy source and rapeseed meal (rapidly degradable) for protein source (S-F) than others, and abruptly increased at 1 hr after feeding regardless of treatments. 3. Concentration of ruminal total volatile fatty acid, acetate and propionate were highest in F-S and peaked at 1 hr after feeding firstly and formed second peak at 9hrs, respectively. 4. Digestibilities of the proximates and ADF were not affected by treatment but NDF was highest in F-F. 5. Nitrogen retention was highest in S-F and lowest in F-F and F-S. 6. Digestibility and metabolizability of energy, contents of DCP, TDN, DE and ME were not affected by treatment. 7. Number of total rumen bacteria showed a peak at 3hrs after feeding and there after decreased. The number of viable rumen bacteria were the greatest in sheep fed the diet of F-F as 7.16×10^11 and the fewest in that of F-S as 2.85×10^11. 8. Cellulolytic bacteria in the rumen of sheep was greatest in diet of S-S and other functional bacteria were not affected by treatments.

비유우의 옥수수싸이레지 다급이 유량및 유지량에 미치는 영향

지설하,이성걸 한국축산학회 1963 한국축산학회지 Vol.5 No.1

The performance response when lactating cows were fed high level feeding of corn silage. as a only roughage, were studied in reprications of a 3×3 Latin square design, each treatment represents 3 cows. The 9 cows from 3 treatments that is 3 different corn silage levels were fed for 16 day's main experiment period following 10 day's preliminary period. The corn silage feeding levels were. (A) Basal ration with corn silage of 3% of body weight, (B) Basal ration with corn silage of 8% of body weight. (C) Basal ration with corn silage of 10% of body weight. The result of this study shoved a summary as follows. 1. There was no significant difference among 3 different levels of corn silage feeding in milk production. The production index was 100 for treatment A. 87 for treatment B and 90 for treatment C. However, there was a lute difference in butter fat content with the index of 100 for treatment A. 99 for B and 95.5 for C respectively. 2. In body weight change, There was no difference among 3 treatments, but slight difference occurred between B and C treatments without statistical significance. 3. The ketone body contents in urine was tested, there was no significant level was founded by feeding of high level of corn silage for lactating dairy cows.

산야초지에서 육성한 젖소 숫송아지 단기비육시험

지설하,홍명기,백윤기,유문일 ( S . H . Chi,M . K . Hong,Y . K . Paik,M . I . Yoo ) 한국축산학회 1973 한국축산학회지 Vol.15 No.3

The studies were carried out to find out the effects of different fattening methods when raising on the native grassland with different levels of concentrates was compared with that on improved grassland. The results obtained are as follows: 1. The daily gain per head during the raising period on improved grassland(control group) was 0.948㎏, while that on native grassland without concentrates(treatment 1), with standard amounts of concentrates(treatment 2) and with ad libitum feeding of concentrates(treatment 3) were 0.325㎏, 0.542 and 0.89㎏ each, respectively. 2. The daily gain per head during the fattening period in control group, in treatment 1, in treatment 2 and in treatment 3 were 1.4㎏, 1.7㎏, 1.7㎏ and 1.6㎏ each, respectively, and also showed no significant difference. 3. For the economics, the net income per head in control group, in treatment 1, in treatment 2 and in treatment 3 were 69,856 won (100%), 67.830 won (97%), 64,754 won (93%) and 50,020 won (72%) respectively. The best return among the experimental groups was attained at T1, with 97% of control value actually earned.

한우의 Immunoglobulin G 및 초유성분의 함량

지설하,오대균,임종우,강만석,안병석 한국낙농학회 1991 韓國酪農學會誌 Vol.13 No.4

한우 25두로부터 산차별로 초유는 분만후 24시간 및 168시간까지는 각파 12시간 및 24시간 간격으로, 정상유는 분만후 10일부터 22일까지는 3일 간격으로 채취하였으며 Ig농도, 회분 및 단백질함량의 변이가 비유 첫 22일간 분석되었다. 산차별에 의한 초유의 Ig농도는 분만직후 초산의 Ig농도가 가장 낮은 반면 3산은 초산과 5∼7산에 비해 각각 1.56 및 1.54배로 산차중에서 가장 높았으며 (P<0.05), 또한 초유의 총 고형분, 회분 및 단백질의 함량도 분만직후 초산이 가장 낮았으며 (P<0.05), 3산이 가장 높았다(P< 0.05). 분만직후 초유의 전평균 lg농도(295.95±16.802㎎/㎖), 회분(1.26±0.048%) 및 단백질(17.27±0.279%)의 함량은 분만후 48시간까지 급속히 감소하였으며(P<0.05) 총고형분(26.58±0.296%)의 함량도 분만후 24시간까지 감소하였고(P<0.05), 정상유의 각 성분함량은 각각 1.38±0.035㎎/㎖, 0.72±0.002%, 3.69±0.013% 및 13.28±0.021%였다. 또한 초유에서의 IgG 농도의 감소율은 초산이 다산보다 높았다. Colostra and milks were collected from 25 Korean native cows in five lactation groups at 12 hr intervals from O to 24 hr and 24 hr intervals from 48 to 168 hr postpartum and 3 days intervals from 10th to 22nd day postpartum and analyzed for concentration immunoglobulin G(IgG), total solids(T. S.), ash and protein during the first 22nd day of lactation. IgG concentration in colostrum from cows of first lactation obtained immediately after parturition was lower than those of second and later lactation, where as that of third lactation was highest(P< 0.05) among all lactation groups except fourth lactation, almost 1.56 and 1.54 times in IgG concentration compared to the first lactation and fifth to seventh lactation, respectively. Also the contents of T. S., ash and protein in colostrum at the first milking postpartum in first and third lactation were lower(P<0.05) and higher(P<0.05) than all lactation groups, respectively. The total mean concentrations of IgG(295.95±16.802㎎/㎖), ash(1.26±0.048%)and protein(17.27±0.297%) in colostrum at first milking postpartum were reduced(P<0.05) rapidly for 24 and T.S. ( 26.58±0.296 %) for 48 hr postpartum. Contents of IgG, ash, protein and T. S of normal milk were 1.38 ±0.035㎎/㎖, 0.72 ±0.002 %, 3.69±0.013 % and 13.28 ±0.021 %, respectively. The rate of reduction in IgG concentration from colostrum was greater in first lactation than in multipara.