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볏짚 가공사료의 개발을 위한 연구 2 . 면양에 대한 볏짚 가공사료의 사료섭취량 , 소화율 및 VFA 조성에 미치는 영향
한인규,최윤재,류연선,김창원,배동호,맹원재,오대균 ( I . K . Han,Y . J . Choi,Y . S . Ryu,C . W . Kim,D . H . Bae,W . J . Maeng,D . K . Ohh ) 한국축산학회 1983 한국축산학회지 Vol.25 No.3
This experiment was conducted to examine feed intake, digestibility and volatile fatty acid (V FA) composition of ruminal juice of NaOH treated rice straw or NaOH treated rice straw pellet through digestibility experiment and the determination of ruminal pH and volatile fatty acid pattern for lamb. Tweleve male lambs weighing 45 ㎏ on average body weight were divided into 4 treatments i.e. control group (raw rice straw chopped in 5 ㎝), 1% NaOH treated group, 3.5% NaOH treated pellet A group (1.7-1.8 ㎝ in diameter and 4.5㎝ in length) and 3.5% NaOH treated pellet B group (2.4 ㎝-2.5 ㎝ in diameter and 3-4 ㎝ in length). Among 12 lambs, 8 lambs were used for digestion trial and 4 fistulated lambs were used for measuring the VFA pattern and changes in pH of rumen juice. The results obtained were summarized as follows. 1. The daily rice straw feed intake of lambs fed rice straw pellet B (806 g/day) and rice straw pellet A (767 g/day) was higher than that of NaOH treated rice straw (679 g/day) or control group (396 g/day). 2. Digestibilities of dry matter, C. Protein, C. fiber and NFE in rice straw pellet B were the highest and that of untreated straw was lowest. Digestibilities of crude fiber and NFE in rice straw pellet A were higher than those of NaOH treated rice straw. However, the opposite trend were shown in those of dry matter, crude fat and crude protein. The contents of DCP and TDN of rice straw pellet B (1.42%, 51.39%) were highest and those of untreated straw (0.39%, 41.58%) were the lowest. 3. The total VFA production of rumen juice was the highest in NaOH treated rice straw pellet A group (101.93 m M/l) and was the lowest in control group (88.39 m M/l). In change of VFA. production, NaOH treated rice straw pellet A and B groups showed the peak at one hour after feeding and was half hour in NaOH treated rice straw. But control group was decreased for one hour. No significant difference was found in pH change of rumen juice collected. According to the present results, NaOH treated with or without palleting the rice straw is considered to be an improved source roughage for the ruminant animals.
반추가축사료에 있어서 buffer 제의 종류별 첨가효과
한인규,육종융,최윤재,류연선 ( In K . Han,C . Y . Yuk,Y . J . Choi,Y . S . Ryu ) 한국축산학회 1983 한국축산학회지 Vol.25 No.2
This experiment was conducted for a period of 30 days to investigate the supplement effect of buffering material for ruminant animal through feed intake examination, digestibility experiments and the examination of ruminal pH and volatile fatty acid pattern for lambs. Nine male lambs weighing 45㎏ in initial weight were divided into 3 treatments i.e. control (without buffering material), buffer-M and buffer-MIX group. Three lambs, which were fistulated, were used in the examination of ruminal pH and volatile fatty acid pattern and the others, which were unfistulated, were used in digestibility experiments. The results obtained are summarized as follows. 1. Feed intake: Feed intake of lambs fed buffering group feed was lower than that of control group feed for the first 10 days. But thereafter, there were not large difference among treatments. Feed intake of buffer-MIX group was higher slightly than that of buffer-M group. 2. Digestibility: Nutrient digestibilities except crude fiber of concentrate addition with buffering material were higher by 2 to 4 percent than those of the concentrate without buffering material. And buffer-MIX was more efficient than buffer-M. The supplement effect of buffering material was showed an increase of 0.5 to 2.0 percent in total digestible nutrients (TDN) but was not showed in digestible crude protein (DCP). 3. Ruminal volatile fatty acid pattern and pH: Control group was lower than buffering groups in acetate molar percent but was higher in propionate and butyrate molar percent. Especially the supplement of buffering material was showed increase of total VFA production quantity and prevention of ruminal pH decline. According to the results obtained it could be suggested to the supplement of buffering material may be essential for ruminant animal. And buffer-MIX may be more effective than buffer-M.
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.