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대사시험에 의한 한우성빈우 ( 韓牛成牝牛 ) 유지시 양분요구량에 관한 연구
탁태영,강태홍,김강식 ( T . Y . Thak,T . H . Kang,K . S . Kim ) 한국축산학회 1983 한국축산학회지 Vol.25 No.2
To estimate the energy and protein requirements for maintenance of Korean Native Cattle, balance experiments of nitrogen and energy have been conducted and the results are compared with those of other breeds in foreign countries and discussed. Series of trials were conducted feeding on maintenance amounts of the Korean Native Cow fed rice straw and hay as a major feeds. These cows were all dry and non-pregnant Korean Native Cow aged from 3 to 9 years. 1. While the average daily nitrogen excreted per metabolic body size (.㎏0.75) per day on 5th and 6th days of fasting was 360.845㎎ (average of 28 trials), and the average fasting heat production of 28 cases on the lying basis per ㎏0.75 per day was 54.32 ㎉. 2. The maintenance requirements of protein per metabolic body size would be sufficient at the amount of 2.26g DCP and 4.85g CP. 3. The ranges of energy loss expressed as the percentage for the gross intake in feces, urine, methane and heat production was 50.68, 1.64, 6.01 and 36.40%, respectively. 4. Net energy (BMR), metabolizable energy, digestible energy and TDN were 54.3, 85.59, 101.34㎉ and 26.53g per ㎏ 0.75 and were 4.40, 6.93, 8.20㎉ and 2.15 ㎏ per 350㎏ of body weight, respectively. 5. From the results of balance and feeding experiments, the average dry matter intake was 62.30g per ㎏ 0.75, corresponding to 1.4% for body weight.
탁태영,강태홍,장윤환 ( T . Y . Thak,T . H . Kang,Y . H . Chiang ) 한국축산학회 1981 한국축산학회지 Vol.23 No.1
This study was conducted to measure the heat production of fasting animals known as basal metabolism on the process of investigating the maintenance energy and nitrogen of Korean native cattle to establish a feeding standard. The five cows were employed and the Brouwer`s equation was utilized to measure the heat production from oxygen consumption, carbon dioxide and methane production and urinary nitrogen. The results obtained were as follows : 1. The digestibility and retention rate of nitrogen were determined as 44% respectively, through the digestion trial carried out prior the fasting experiment for 7 days. 2. The amount of nitrogen excreted during the 5th and 6th days of fasting experiment was known as 224.69 ㎎ per metabolic body size (three quarter power of kg body weight) per day. 3. The hours spent standing and frying were investigated as 770.72 min. (53.52%) and 669.28 min. (46.48%), respectively, during the respiration trial. The times changing position was 8.6 a day. 4. The heat production on the basis of lying position was 53.94 ㎉ per metabolic body size per day for Korean native cows tested. This figure was found as similar to that of Japanese cattle but considerably lower than those of the other species of beef and dairy cattle investigated in foreign countries.
環境要因이 韓牛의 妊娠期間, 生時體重 및 生時體型에 미치는 影響
卓泰永 건국대학교 1978 論文集 Vol.8 No.1
This study was conducted to find out the effects of calving number, sire, year of birth, breeding season and sex of calf on gestation period, birth weight and birth body measurements of Korean native cattle. It was analyzed by least square method on the basis of the data obtained from 189 calves by 13 sires raised at the Alpine Experiment Station from 1971 to 1974. The results obtained from this study were as follows : 1. Gestation period of Korean Native cattle was 284.68 days ; birth weight, 24.12 Kg; withers height, 65.72 cm; height at hip cross, 66.85 cm; body length, 57.38 cm; rump length, 19.88 cm; hip width, 13.03 cm; pine bone width, 6.72 cm; shank circumference, 9.57 cm; chest girth, 66.45 cm ; respectively. 2. Calving number showed highly significant differences for pine bone width. 3. Year of birth was signficant differences for withers height and was highly significant differences for pine bone width and chest girth. 4. Gestation period of the bulls and heifers born in summer were seemed to be longer than the others and breeding season was significant differences for pine bone width. 5. The effects of sex was highly significantant differences of birth wight and shank circumference and was significant differences for chest girth. The bulls was higher than the heifers in other traits except body length, hip width and pine bone width.
탁태영,이상철,강태홍,김강식 ( T . Y . Thak,S . C . Lee,T . H . Kang,K . S . Kim ) 한국축산학회 1986 한국축산학회지 Vol.28 No.6
In order to investigate the influence of feeding level on the efficiency of energy utilization in fattening of Korean native cattle, a metabolic experiment was carried out with four mature Korean native cows by Latin square method. After determining 1.5㎏ mixed hay and 2.6㎏ concentrate mixture as the amounts for maintenance, 1.5, 2.0, 2.5 and 3.0 times of the amounts of maintenance were calculated and fed to each of cattle successively by the feeding schedules. The regression equations between the energy intake and the proportion of energy deposited were made. The results above suggested 249.7 Kcal ME and 136.1Kcal net ME per metabolic body size daily should be fed to maximize the proportion of ME deposition and net ME deposition. At this point daily DM intake was about 2.2% of body weight.