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면양에 대한 국산옥수수 펠릿트의 성장능력 , 소화율 및 제1위내 VFA조성에 미치는 영향
최윤재,육종융,한인규,류연선,배동호 ( Y . J . Choi,C . Y . Yuk,I . K . Han,Y . S . Ryu,D . H . Bae ) 한국축산학회 1982 한국축산학회지 Vol.24 No.4
This experiment was conducted for a period of 140 days to evaluate feeding values, digestibility and volatile fatty acid (VFA) composition of ruminal juice of whole corn crop pellet and corn ear with husk pellet through feeding trial, digestibility experiment and the determination of ruminal pH and volatile fatty acid pattern for lamb. Twelve male lambs weighing 30㎏ in initial body weight were divided into 4 treatments i.e. control, whole corn crop pellet, corn ear with husk pellet and rice straw pellet group. The results obtained are summarized as follows. 1. The body weight gain of lambs fed whole corn crop pellet (1,254.8g) and corn ear with husk pellet group (1,253.9g) was higher than that of rice straw pellet fed group (1,194.3g) or control group. And control group (974.7g) was the lowest. The body weight gain of whole corn crop pellet group was significantly (p$lt;0.05) heavier than that of control group. While, there were no significant differences among the other treatments. Daily dry matter consumption and feed efficiency showed the same tendency as the body weight gain. 2. Digestibilities of the dry matter, crude protein, crude fiber and nitrogen free extract (NFE) in the corn pellets were lower than those in the commercial formula feed, but were higher or slightly lower than those in hay or rice straw pellet. While, crude fat digestibilities of corn pellets were the highest among treatments. Digestible crude protein contents of the whole com crop pellet and corn ear with husk pellet were found to be 5.86 and 6.59%, respectively. Total digestible nutrients (TDN) values of the whole corn crop pellet (62.74%) and corn ear with husk pellet (69.00%) were lower than that of commercial formula feed (72.26%), but higher than that of hay (59.61%) by 3-9%. 3. The changes in ruminal VFA production in molar % were characterized by 4-5% decrease in acetate production and 3-4% and 2-3% increases in propionate and butyrate production during 20 days after feeding the experimental feed, but were not affected by treatments. Tonal VFA production of corn pellet groups was higher than that of rice straw pellet or control group. The ruminal pH was decreased from 0 day to 10 days after feeding experimental diets, but was not changed thereafter regardless of treatments. According to the results of obtained from the present studies, it could be suggested that the use of whole corn crop pellet and corn ear with husk pellet may be used as a combined feed of roughage and grains for ruminant animals and will also help to contribute the use of self produced feedsruffs.
흰쥐 유선의 발달과 유단백질 발현에 있어서 Cimaterol 의 효과 1 . 유선의 발달과 in vitro 아미노산 흡수능력에 미치는 영향
최윤재(Y . J . Choi),우정희(J . H . Woo),한인규(I . K . Han) 한국축산학회 1990 한국축산학회지 Vol.32 No.9
The objectives of this study were to examine the effects of β-agonist cimaterol on mammary differentiation and the activity of amino acid uptake in acinar cell culture. Ninety six weanling female rats were assigned to either a control or test (supplementation of cimaterol, 10mg/kg) group. For feeding trial, growth rate and feed intake were examined. Mammary tissues from selected experimental animals were obtained to examine the mammary differentiation by chemical analysis, and to conduct the acinar cell culture for evaluating amino acid uptake activity. Rats on test group had significantly improved the growth rate and feed intake. The supplementation of cimaterol in rat diet increased the ratio of RNA/DNA and protein/DNA, DNA and protein with a decrease in lipid content in mammary glands. Mammary glands from the test group animals had more amino acid uptake activity by acinar cell culture than those from control group animals. These results indicate that supplementation of β-agonist cimaterol in rat diet can influence differentiation and amino acid uptake in mammary gland.