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비유우에 있어 Calcium 및 Phosphorus 의 대사에 관한 연구
지설하 ( S . H . Chee ) 한국축산학회 1974 한국축산학회지 Vol.16 No.1
Most of dairy cattle in Korea are commonly fed by local concentrates and native grass hay consists mainly of Arundahella hirta which is one of a major variety that is known to be poor source of calcium and phosphorus among other native grasses. Under such circumstance it would be very important to conduct a series of experiments to study the effects of the supplementation of different level of dietary calcium and phosphorus on milk production and milk fat content. Three levels of calcium and phosphorus(130%-high level, 100%-standard and 70%-low level of that described in National Research Council Nutrient Requirements for dairy cattle) were given to 9 dairy cows to investigate the effects of supplementation of dietary calcium and phosphorus on milk production, milk quality, changes in body weight, calcium and phosphorus content in milk an blood, intake and output of calcium and phosphorus, and true digestibility of phosphorus: This experiment was conducted during the period from December, 1972 to March, 1973 using 9 lactating Holstein cows. The results obtained are as follows: 1. When expressed in terms of fat corrected milk, total milk production and the average daily milk production per cow fed high level of calcium and phosphorus were 1,556.9㎏ and 11.5±2.97㎏, respectively. Total milk production and average daily milk production per head for standard level of calcium and phosphorus group were 1,540.6㎏ and 11.4±2.11㎏ and these for low level group mere 1,390.5㎏ and 10.3±1.83㎏, respectively. The high level of calcium and phosphorus group showed the highest milk production, although there was no significant difference among the groups. 2. The percentage of milk fat for the high, standard and low level of calcium and phosphorus groups was 3.5±0.55%, 3.4±0.49% and 3.6±0.69%, respectively, with no significant difference between treatments. The percentage of solid not fat (S.N.F.) for high, standard and low level of calcium and phosphorus groups was 8.3±0.83%, 8.3±0.45%, and 8.4±0.91% respectively, although no statistical difference was observed. It was concluded that the level of calcium and phosphorus did not affect the content of fat and S.N.F. of milk. 3. The high calcium and phosphorus treatment gained body weight as much as 3.7㎏ per head on the average while the standard and low level resulted in a decreased body weight by 6.7㎏ and 16.3㎏, respectively. 4. The total intake of concentrates and roughage in terms of dry matter for the treatments of high, standard and low level was 1,764.2㎏, 1,849.9㎏ and 1,719.2 ㎏, respectively. While average daily intake (concentrates plus roughage) per head for high, standard and low level was 15.1㎏, 15.6㎏ and 14.5㎏, respectively. The dry matter intake required per kilogram of milk production for high, standard and low level of calcium and phosphorus groups was 1.13㎏, 1.23㎏ and 1.23㎏, respectively. It is suggested that 130% of calcium and phosphorus intake described in National Research Council Nutrient Requirements for dairy cattle was preferable to maximize the milk production and minimize the amount of feed intake. 5. Analytical data showed that the calcium and phosphorus content of milk for the cows received high level of calcium and phosphorus were 0.0985±0.0169% and 0.0845±0.0022% and these far cows fed the standard level of calcium and phosphorus were 0.0960±0.0102% and 0.0845±0.0035% and for cows received low level were 0.0942±0.0102% and 0.0838±0.0030%, respectively. However, no significant difference was observed between treatments in the calcium and phosphorus content of milk. 6. It was found that the calcium and phosphorus content in 100m1 of blood plasma for the high level group were 14.2㎎ and 5.6㎎ and those for the standard level group were 13.6㎎ and 4.3㎎ and those for the low level group were 13.1㎎ and 4.5㎎, respectively. The calcium and phosphorus content of blood plasma did not change proportionally to the level of calcium and phosp
착유우 (搾乳牛) 의 볏짚사료위주 사육시 양조부산물 (釀造副産物) 과 Beet Pulp 첨가에 관한 연구
지설하(S . H . Chee),박창식(C . S . Park),김준식(J . S . Kim),박상문(S . M . Park),하종규(J . K . Ha) 한국축산학회 1992 한국축산학회지 Vol.34 No.5
The current studies were conducted to determine the effect of feeding value of brewers grain(BG) and beet pulp(BP) for lactating cows compared to corn silage and hay with rice straw. Twelve lactating cows were alloted into 3 × 3 Latin square method to determine the effect of feeding BG and BP with rice straw on lactating performance. Whole tract nutritive digestion, ruminal dry matter and protein degradation, and protein retention rate were also examined with sheep. The results obtained from present experiments are as follows; 1. Daily milk yield of cows fed corn silage-hay (CS-H), rice straw-beet pulp-brewers grain (RS-BP-BG) and rice straw-beet pulp (RS-BP) was 18.12, 19.21 and 18.32㎏, respectively. Cows fed RS-BP-BG had the highest milk yield(P$lt;0.05). Milk fat and liveweight were not affected by diets. 2. No significant differences on ruminal C₂ and C₄ concentrations were observed among experimental feeds, but C₃ concentration in CS-H, RS-BP-BG and RS-BP were 13.60, 37.18 and 31.82 mM/L(P$lt;0.05). Sheep fed CS-H had the highest ruminal P (6.2), while those fed RS-BP showed the lowest ruminal P (5.7) (P$lt; 0.05). 3. Percent dry matter disappearances of experimental diets containing CS-H, RS-BP-BG and RS-BP in the rumen were 66.7, 63.3 and 69.2%, and the protein disappearances from nylon bags incubated for 24 hrs were 66.7, 61.3 and 67.1%, respectively. 4. Whole tract dry matter, protein, NDF and ADF digestion was influenced by dietry treatment with highest digestibility in sheep fed RS-BP (P$lt;0.05), while no significant differences on digestibilities of ether extract and crude ash were observed among diets. 5. Sheep fed CS-H had the highest total N intake, and RS-BP had the highest N retention (35.86%) (P$lt; 0.05). 6. Total viable counts of bacteria in the rumen of sheep fed CS-H, RS-BP-BG and RS-BP were 3.63×10^9, 3.91×10^9 and 4.05×10^9/㎖, and cellulolytic bacteria in rumen content was 0.3×10^7, 1.5×10^7 and 1.1×10^7/㎖. 7. Gross income was highest for cows fed RS-BP-BG. In conclusion, the lactating performance was improved when cows were fed RS-BP-BG as a replacement of CS-H
박창식(C . S . Park),이봉덕(B . D . Lee),지설하(S . H . Chee),이광원(K . W . Lee),이성호(S . H . Lee) 한국축산학회 1992 한국축산학회지 Vol.34 No.4
In order to solve the urgent manure disposal problem facing Korean swine industry, the wood sawdust fermentation floor system (WSF), was compared with the conventional concrete floor system (CCF) in a series of feeding trials. Trials 1 through 4 were carried out in a year, with 36 to 40 finishing pigs per trial, to investigate the performances during 4 different seasons on both CCF (4m×7m) and WSF (4m ×9m or 6m×8m). Pigs were group-fed with ad libitum feeding until they reached about 110㎏ BW. Initial and final BW were measured individually. The backfat thickness and loineye area were also measured at the final day of each trial using an ultrasonic instrument. Regardless of the season, no significant differences (P$gt;0.05) were found in daily gain between CCF and WSF. However, the daily gain of barrows showed that WSF was more advantageous than CCF during winter, and vice versa during summer. Except during winter, no significant differences (P$gt;0.05) were found in backfat thickness and loineye area between CCF and WSF. It turned out that WSF could be a way to solve the problems of manure disposal and malodours throughout a year without spending extra money or labor.
돼지 수정란 이식에 관한 연구 1 . 발정동기화 및 과배란유기
손동수(D . S . Son),이광원(K . W . Lee),최진성(J . S . Choi),김경남(K . N . Kim),강만석(M . S . Kang),지설하(S . H . Chee),박창식(C . S . Park) 한국축산학회 1987 한국축산학회지 Vol.29 No.12
This study was carried out to investigate the effect of synchronization of estrus and induction of superovulation after administration of altrenogest, PMSG and HCG in the multiparous sows weaned at 50-56 days. A total of 100% of the treated sows exhibited estrus within a four-day period. The average number of ovulation points per sow among superovulated breeds such as Landrace, Large White, Duroc and Hampshire was between 17.6 and 24.0.
김학규(H . K . Kim),고문석(M . S . Ko),김인철(I . C . Kim),정행기(H . K . Chung),이광원(K . W . Lee),손동수(D . S . Son),김현(H . Kim),지설하(S . H . Chee),박창식(C . S . Park) 한국축산학회 1989 한국축산학회지 Vol.31 No.3
This study was carried out to investigate the effect of aluminium rack distance from liquid nitrogen surface in liquid nitrogen container on post-thaw sperm motility and NAR acrosome in maxi-straws. The post -thaw sperm motility and NAR acrosome for 15 cm from the liquid nitrogen surface were 57% and 56 % after 0.5 h incubation at 37℃, and 31 % and 38 % after 2 h incubation. The straws frozen from 5 cm to 25 cm above the liquid nitrogen surface did not show any significant differences on post-thaw sperm motility and NAR acrosome. The utilization of this deep-freezing method is considered to be acceptable under practical farm conditions.
돼지 수정란이식에 관한 연구 2 . 수정란의 회수 및 이식
이광원(K . W . Lee),손동수(D . S . Son),김상철(S . C . Kim),김일화(I . H . Kim),전대규(D . K . Jeon),유일선(I . S . Ryu),이종관(J . K . Lee),지설하(S . H . Chee),박창식(C . S . Park),석호봉(H . B . Seok) 한국축산학회 1988 한국축산학회지 Vol.30 No.7
This study of embryo transfer was carried out to investigate the possibility of introducing new genetic material into closed herds for disease control and of transporting embryos between countries. The results obtained were summarized as follows: 1. On the basis of the number of ovulation points counted, 69.1% of embryos were recovered. 2. A very high proportion (86.6%) of 1-cell embryos were recovered from the oviducts of donor sows at 37 to 41 hours after first mating. 3. Sixty-seven embryos were transferred to 5 recipients. Four recipients farrowed a total of 18 pigs, giving a survival rate of 26.9%. 4. Average pig weight at birth was 1.46㎏.
볏짚 - 계분 발효사료 급여시 비유효과에 미치는 영향 및 발효사료의 안전성에 관한 연구
윤칠석,박전홍,오태광,이남형,김춘수,지설하,오대균,김준식 ( C . S . Yoon,J . H . Park,T . K . Oh,N . H . Lee,Chu S . Kim,S . H . Chee,D . K . Ohh,J . S . Kim ) 한국축산학회 1985 한국축산학회지 Vol.27 No.8
This experiment was carried out to evaluate the effects of feeding straw-manure silage compared with corn silage, and were consisted of trial I by Holstein cows and trial II by sheep with change-over feeding. And trial II was used to evaluate the digestibility and ruminal characteristics. The ratio of formula feed to each silage during experimental period was maintained at 40: 60 (w/w) as DM basis. Data from trial I on corn and straw-manure silage group, respectively, were; daily milk yield 17.23, 17.05㎏; milk fat 4.06, 4.19%; milk protein 3.89, 3.92%; milk lactose 5.27, 5.17%; SNF 10.36, 10.38%. These values were not significantly different between treatments. The digestibility of ration components on trial II showed that the digestibility of proximate composition of corn silage group tended to be slightly increased. But the fibrous matetial digestibility of straw-manure silage showed more increased results (p$lt;.05). Ruminal parameters on pH and VFA concentration were similar with two silage group. However, straw-manure silage resulted in stepwise increase in propionate and valerate throughout the sampling time. Blood parameters and parasites were observed to elucidate the possible harzardness of straw-manure silage feeding in dairy cattle. No difference was observed in PCV, Hb, plasma prote in, and BUN. Cholesterol and ALT were appeared slightly high value in straw-manure silage feeding group, however, plasma glucose was neverse. Nematodes survived up to 40 fermentaton days, and mites up to 30 days. Protozoa died within 10 fermentation days.
5ml 스트로에 보존한 돼지 액상정액의 생존성과 수정능력에 관한 연구
정행기(H . K . Chung),김학규(H . K . Kim),고문석(M . S . Ko),김인철(I . C . Kim),최진성(J . S . Choi),이광원(K . W . Lee),손동수(D . S . Son),김현(H . Kim),지설하(S . H . Chee),박창식(C . S . Park) 한국축산학회 1989 한국축산학회지 Vol.31 No.3
This experiment was carried out to test the efficiency of BF5 diluent in improving the length of maintenance of the fertilizing capacity of liquid boar semen in 5ml maxi-straw. The sperm-rich fraction of each ejaculate was slowly cooled to room temperature by 2 h after collection. Semen was diluted with BF5 diluent to provide about 20 x 10` sperm/ml. Semen was cooled in a waterbath to 51℃ over a 2-h period and BF5(+2 % glycerol) diluent was added to cooled semen(1:1). Straws were imm ediately filled with 5ml of semen and steel or glass balls were used to seal the ends of the straws. The straws were horizontally placed on a metal rack and stored at 51c in a refrigerator. At insemination the straw was rediluted with 75ml BTS diluent. The BF5 diluent maintained boar sperm fertilizing capacity for 9 days of in vitro storage. Conception rate, farrowing rate and number of pigs born alive per litter of diluted semen stored at 51℃ for 9 days were 70%, 50% and 9.6, respectively.