알칼리처리가 저질조사료의 발효율 및 발효속도에 미치는 영향 1 . 옥수수대

최일,정태영,맹원재 ( Il Choi,Tae Y . Chung,Won J . Maeng ) 한국축산학회 1983 한국축산학회지 Vol.25 No.3

Effects of alkali treatment on the digestibilities and rates and extents of fermentation of dry matter of com stover was determined in vitro. Dry matter digestibilities of corn stover markedly increased with increasing level of NaOH treatment and the extent of increase was much higher at 100℃ for 1 hour treatment than at room temperature for 24 hours treatment, Dry matter digestibility of untreated com stover was 35.96% and of treated com stover with 4, 8% NaOH were 50.44%, 70.20% at room temperature for 24 hours and 53.55%, 79.53% at 100 ℃ for 1 hour aeatment, respectively. Fermentation rate constants and fermentation time of dry matter of untreated corn stover were 0.00438 he 1, 228 hr and of treated com stover with 4, 8% NaOH were 0.00831 hr^(-1) ; 0.01382 hr^(-1) and 120 hr. 72 hr at room temperature for 24 hours and 0.0100 hr^(-1), 0.02186 hr^(-1) and 99 hr, 46 hr^(-1) at 100 ℃ for 1 hour treatment, respectively.

알칼리처리가 저질조사료의 발효율 및 발효속도에 미치는 영향 1 . 볏짚 , 보릿짚

최일,정태영,맹원재 ( Il Choi,Tae Y . Chung,Won J . Maeng ) 한국축산학회 1983 한국축산학회지 Vol.25 No.3

Effects of alkali treatment on the digestibilities and rates and extends of fermentation of dry matter of rice straw, barely straw were determined in vitro. Dry matter digestibilities of rice straw, barley straw markedly increased with increasing levels of NaOH treatment and the extent of increase was much higher at 100 ℃ for 1 hour treatment than at room temperature for 24 hours treatment. Dry matter digestibility of untreated rice straw was 38.53% and of treated rice straw with 4.8% NaOH were 57.29%, 79.24% at room temperature for 24 hours and 65.32%, 85.19% at 100℃ for 1 hour treatment, respectively. Dry matter digestibility of untreated barley straw was 37.39% and of treated barley straw with 4,8% NaOH were 59.15%, 77.09% at room temperature for 24 hours and 62.20%, 79.53% at 100℃ for 1 hour treatment, respectively. Fermentation rate constants and fermentation time of dry matter of untreated rice straw were 0.00741 hr^(-1), 135 hr and of treated rice straw with 4,8% NaOH were 0.01065 hr^(-1), 0.01919 hr^(-1) and 94 hr, 52 hr at room temperature for 24 hours treatment and 0.01919 hr^(-1), 0.02376 hr^(-1) and 52 hr, 42 hr at 100℃ for 1 hour treatment, respectively. Fermentation rate constants and fermentation time of dry matter of untreated barley straw were 0.00636 hr^(-1), 157 hr and of treated barley straw with 4,8% NaOH were 0.0134 hr^(-1), 0.02321 hr^(-1) and 75 hr, 43 hr at room temperature for 24 hours and 0.01324 hr^(-1), 0.02217 hr^(-1) and 76 hr, 45 hr at 100 ℃ for 1 hour treatment, respectively.

동물성 지방 첨가가 육성 비육돈의 성장과 사료효율 및 등지방 두께에 미치는 영향

맹원재(Won J . Maeng),김영조(Young J . Kim),최일(I . Choi) 한국축산학회 1988 한국축산학회지 Vol.30 No.6

One hundred twenty pigs averaging 23.2㎏ in body weight aged 66 days were arranged with completely randomized design into 5 treatments, 0, 2.5, 5.0, 7.5, and 10.0% animal fat in grower and finisher diets, with 24 pigs per treatment and 6 pigs per pen to measure the growth rate, feed efficiency and backfat thickness of growing and finishing pigs. Daily weight gain of growing pigs was increased over the control as fat levels increase up to 5% level and at above 5% fat level it was decreased below the control Feed consumption was decreased as the level of fat in the diets increased. Feed conversion ratios were also decreased as fat levels were increased in the growing diets (p$lt;0.05). Maximum daily weight gain and maximum feed efficiency were obtained at 2.5% and 5.0%o fat levels in the grower diets, respectively. This amounts to a 6.6% improvement in gain and 9.2% improvement in feed efficiency on the growing pigs. Daily weight gain of the finishing pigs was increased by increasing fat levels in the finisher diets. Feed consumption and feed conversion ratios were decreased as fat levels were increased. Maximum daily gain was obtained at 5.0%o fat level with 10.9% improvement, and maximum feed efficiency was obtained at 7.5% fat level with 17.6% improvement in the finishing diet. Backfat thickness of growing and finishing pigs was slightly increased as fat levels increased in the diets, but it was not statistically significant.

조사료의 발효율 및 발효속도 측정 1 . 볏짚

맹원재,최일,양양한 ( Won J . Maeng,Il Choi,Yang H . Yang ) 한국축산학회 1980 한국축산학회지 Vol.22 No.3

Rates and extents of fermentation and potentially digestible dry matter, cell wall constituents(CWC), acid detergent fiber (ADF) and cellulose of rice straw(Suweon 264) were determined in vitro, Potentially digestible dry matter(PDDM), Potentially digestible CWC(PDCWC), Potentially digestible ADF (PDADF) and potentially digestible cellulose (PDcellulose) of rice straw were 54.2%, 46.5%, 46.5% and 51.8%, respectively. Fermentation rate constants and fermention time of dry matter, CWC, ADF and cellulose of rice straw were 0.0075 hr^(-1), 0.0082hr^(-1) and 0.0096 hr^(-1) and 134 hr, 122 hr, 126 hr and 105 hr, respectively, Fermentation rate constants and fermentation time of PDDM, PDCWC, PDADF and PDcellulcose of rice straw were 0.0293 hr^(-1), 0.0348hr^(-1), 0.0336 hr^(-1) and 34 hr, 29 hr, 30 hr and 28 hr, respectively.

옥수수의 부위별 영양가치와 알칼리 처리 효과

맹원재,최일 ( Won J . Maeng,Il Choi ) 한국축산학회 1981 한국축산학회지 Vol.23 No.2

The relative proportions and potentially digestible dry matter contents of corn grain, corn cob and corn stover, and improvement of digestibilities of corn cob and corn stover by alkali treatment were estimated in vitro method and the result were summarized as follows. 1. The relative proportion, of corn grain, corn cob and corn stover of whole corn plant on a dry matter basin were 39.3%, 11.1% and 49.6%, respectively. 2. Corn grain had the highest amount of crude protein(9.7%) followed icy corn stover(6.4%) and corn cob(4.6%). Corn cob had the highest amount of cell wall constituent(CWC) (82.6%) followed by corn stover(68.4%)and corn grain (23.2%). Corn cob had higher amount of CWC, acid detergent fiber (ADF) and cellulose but lower amount of lignin than corn .Mover. 3. Potentially digestible dry matter (PDDM) contents of corn grain, corn cob and corn Mover were 95.5%, 80.5% and 68.8%, respectively. Whole corn plant contained 80.4%, of PDDM, which were consisted of 37.5%, of corn grain, 8.9% of corn cob and 34.0% of corn stower. 4. Dry matter digestibilities of corn grant, corn cob and corn slower were 79.9% 66.5% and 60.0%, respectively. Alkali treatment of corn cob and corn stover improved significantly dry matter, CWC, ADF and cellulose digestibilitiea (p$lt;0.01) and improvements were much higher in corn cob treated at 100℃ for 1 hour than 23℃ for 24hour(p$lt;0.01), but in corn slower there were no significant differences between treatment temperature.

임신돈 사료와 포유돈 사료에 동물성 지방첨가가 자돈의 생시체중 및 생존율과 모돈의 재발정일수에 미치는 영향

맹원재(Won J . Maeng),김영조(Young J . Kim),최일(I . Choi) 한국축산학회 1988 한국축산학회지 Vol.30 No.5

Forty eight pregnant sows were arranged with completely randomized design into 4 treatments, 0, 5, 10 and 15% animal fat levels in the late gestation and lactation diets, with 12 sows per treatment to measure survival rate and weaning weight of piglets and days of estrus return of sows post-weaning. Birth weight and survival rate from birth to weaning were not different when the different levels of animal fat were added in late gestation and lactation diets. Body weight at 14 and 28 days (weaning) were higher in diet containing fat and the highest value was at 5% fat level (p$lt;0.05). This figures were 9.8% improvement in body weight at 14 days and 11.5% improvement at 28 days over the control. Percentages of estrus return before 7 days post-weaning were 75%o, 83%, 91% and 83% of the total sows for 0, 5, 10 and 15% animal fat levels in the diet, thus showing much higher percentages in sows fed animal fat, especially in 10% aminal fat level.

조사료의 발효율 및 발효속도측정 2 . 보리짚

맹원재,양양한,최일 ( Won J . Maeng,Yang H . Yang,Il Choi ) 한국축산학회 1980 한국축산학회지 Vol.22 No.5

In vitro fermentation characteristics such as rates and extents of total and potentially digestible dry matter, cell wall constituents (CWCO), acid detergent fiber(ADF) and cellulose were determined for barley straw which were incubated for 6, 24, 36, 48, 72 and 144 hours at 39℃ in water bath. Potentially digestible dry matter (PDDM), potentially digestible CWC (PDCWC), potentially digestible ADF(PDADF) and potentially digestible cellulose (9PDcellulose) of barley straw were 59.2%, 55.3%, 46.5% and 59.6%, respectively, which were calculated by differences from indigestible residues remaining after 144 hours incubation. Fermentation rate constants and fermentation time of dry matter, CWC, ADF and cellulose of barley straw were 0.00912hr^(-1), 0.00888hr^(-1), 0.00715hr^(-1), and 0.01218hr^(-1), and 109.7hr, 112.6hr, 139.9 hr and 82.10hr, respectively. Fermentation rate constants and fermentation time of PDDM, PDCWC, PD ADF and PDcellulose of barley straw were 0.03117hr^(-1), 0.02643hr^(-1), 0.03020 hr^(-1) and 0,04630hr^(-1), and 32.1hr, 37.8hr, 33.1hr and 21.6hr, respectively.

볏짚의 사료가치 개선에 관한 연구 2 . 옥수수 및 요소 첨가수준과 Retention time 이 볏짚의 In Vitro 소화율에 미치는 영향

맹원재,오세정,최일,양양한 ( Won J . Maeng,Se J . Oh,Il Choi,Yang H . Yang ) 한국축산학회 1979 한국축산학회지 Vol.21 No.6

Effects of different levels of corn and urea addition and retention time on the digestibility of rice straw (Mil Yang 23) were estimated in vitro. The optimum ratio of rice straw to corn for the highest dry matter digestibility of rice straw was 50% rice straw and 50% corn, and cellulose digestibility of rice straw was increased by increasing levels of corn in the incubation medium. Dry matter, neutral detergent fiber, acid detergent fiber and cellulose digestibilities of rice straw were highest when 0.5% urea on the dry matter basis of rice straw was added. Dry matter digestibility of rice straw was 13.3% when retention time was 24hours and was 24.6% and 35.1% when retention time was 48 hours and 72 hours which were 85% and 164% increases as compared with 24 hours. Digestibilities of neutral detergent fiber, acid detergent fiber and cellulose of rice straw were increased as increasing retention time as dry matter digestibility. Total amount of rice straw dry matter digested for a day was decreased 7.5% and 12.5%, respectively, when retention time was increased to 48 hours and 72 hours from 24 hours. But total amount of neutral detergent fiber, acid detergent fiber and cellulose digested for a day were increased 10.0%, 11.1% and 2.9% when retention time was 48 hours, and 12.5%, 44.4% and 38.2%, respectively, when retention time was 72 hours as compared with 24 hours.

볏짚의 품종별 사료가치 비교

맹원재,양양한,최일 ( Won J . Maeng,Yang H . Yang,Il Choi ) 한국축산학회 1979 한국축산학회지 Vol.21 No.6

Chemical compositions and in vitro digestibilities were estimated to evaluate the nutritive values of the different varieties of rice straws, The rice varieties used in this study were the Indica x Japonica breeding lines, Suweon 264 and Milyang 23, and Japonica, Jinheung, The heights of Milyang 23, Jinheung and Suweon 264 were 98㎝, 95㎝ and 70.4㎝, respectively, and the proportions of grain and straw were 53.8% and 46.2% of the total rice plant on a dry matter basis, Leaf blade, leaf sheath and stem were 29.6%, 36.4% and 33.9%, respectively, of the total rice straw on a dry matter basis, Crude protein and cell content were slightly higher and cell well constituents, acid detergent fiber, cellulose and lignin contents were slightly lower in Suweon 264 as compared with Jinheung and Milyang 23, but there were no differences between Jinheung and Milyang 23. Leaf sheath contained the highest amounts of cell wall constituents, acid detergent fiber and cellulose followed by leaf blade and stem. In vitro dry matter, cell wall constituents, acid detergent fiber andcellulose digestibilities of rice straw were the highest in Suweon 264 followed by Jnheung, and Milyang 23 was the least. In vitro dry matter, cell wall constituents, acid detergent fiber and cellulose digestibilities were the highest in stem and there were no differences between leaf sheath awe leaf blade.