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RISS 인기검색어
- 검색키워드
- 저자 : 김광종(K . J . Kim) (검색결과 3 건)
- 무료
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대맥사일리지 및 대맥펠렛 급여가 젖소의 유량 , 유성분 , 반추위내 발효에 미치는 영향
김준식(J . S . Kim),이현준(H . J . Lee),김광종(K . G . Kim),조윤연(Y . Y . Cho),지설하(S . H . Chee),하종규(J . K . Ha) 한국축산학회 1987 한국축산학회지 Vol.29 No.11
The current study was undertaken to determine the feeding value of the whole-plant barley silage harvested at dough stage (BDS), barley silage harvested at ripening stage (BRS) and barley pellet (BP) as a roughage source for milking cows compared with corn silage (CS) and hay. Sixteen lactating cows (613.8㎏) producing 21.3㎏ of milk daily were alloted into four treatments. Digestrbility of various nutrients contained in three silages and one pellet, volatile fatty acid (VFA) concentration in rumen fluid after feeding these silages and pellet were investigated using twelve Corriedale rams. The results obtained were summarized as follows: 1. Milk production was significantly (P$lt;0.05) higher in BP group (21.24㎏) and BDS group (19.48㎏) than CS group (17.37㎏) and BRS group (17.80㎏). 2. There was no significant effects of diet on milk fat, but milk protein content was significantly higher (P$lt;0.05) in CS group and BRS group than BP group and BDS group. Lactose content was significantly increased (P$lt;0.05) when CS was fed compared with BDS group. 3. Differences in feed intake between CS group and the other groups were not significant. 4. Corn silage tended to increase body weight gain over other treatments, but there was no significant difference between four treatments. 5. The apparent digestibilities of roughage dry matter (DM) and crude protein were not different among treatment groups. 6. Ruminal total VFA production, molar percentage of rumen acetate, propionate, isovalerate were significantly higher (P$lt;0.05) in BRS group, but butyrate and valerate were not significant. 7. The feed cost far producing 1㎏ milk was estimated as ￦146 in CS group and ￦119 in BDS group. Higher net income (￦1486/head) was made in BP group.
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암모니아 및 가성소다처리 볏짚 급여가 젖소 숫송아지의 발육에 미치는 영향
김준식(J . S . Kim),정하연(H . Y . Chong),김광종(K . J . Kim),조윤연(Y . Y . Cho),지설하(S . H . Chee),한인규(I . K . Han) 한국축산학회 1990 한국축산학회지 Vol.32 No.8
This experiment was carried out to investigate feeding value of 4% anhydrous ammonia (NH₃-RS) and 4% sodium hydroxide treated rice straw NaOH-RS) on the performance of 12 Holstein young bulls. Also nutrient digestibility and ruminal pH as influenced by dietary treatment were determined in sheep. The results obtained were as follows; 1. Ammonia treatment increased crude protein content of rice straw by 2 times (9.8% vs 4.2%). Ammonia and sodium hydroxide treatment reduced NDF and ADF content of rice straw. 2. Rice straw intake by Holstein bulls was increased by 20% by ammonia treatment (p$lt;0.0 5). 3. Daily gain were increased by ammonia (18%) and NaOH treatment (8.6%), respectively, over the U-RS group, without significant difference among treatment. 4. Ruminal PH was slightly difference among treatment, but there was no significance. 5. Dry matter and crude fiber digestibilities of NH₃-RS and NaOH-RS were significantly higher than those of U-RS. No difference, however, in crude protein digestibilities was found among treatment. 6. Daily net income except labour per head was 2110 Won in NH₃-RS and 1850 Won in NaOH-RS, and 1780 Won in U-RS. More net income (330 Won /head) was made in NH₃-RS group.
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유우의 임신기간 및 생시체중의 반복력과 이들 형질에 미치는 환경효과
상병찬,조윤연,김광종 ( B . C . Sang,Y . Y . Cho,K . K . Kim ) 한국축산학회 1986 한국축산학회지 Vol.28 No.4
This study was conducted to investigate the effects of year, calving season and parity on the gestation length and birth weight and the repeatability of these traits with the records of 1,954 from 522 Holstein cows at National Animal Breeding Institute from 1970 to 1981. The results obtained are summarized as follows; 1. The average gestation length was 279.374±0.859 days, and year and calving season had significant effect (P$lt;0.01) on gestation length. Gestation length of cows calved in summer was shortest and that of cows calved in winter was longest. 2. The average birth weight was 40.602±0.277㎏, and year, calving season and parity has significant effect (P$lt;0.01). The birth weight of calves from heifers was lightest and that of calves from cows with 4th parity was heaviest. 3. The repeatability estimates for gestation length and birth weight were 0.775±0.021 and 0.168±0.017, respectively.
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