姙娠末期 및 哺乳期 飼料의 아미노산 補强이 母豚의 生産性 및 仔豚成長에 미치는 影響

辛炯泰,金永玉 成均館大學校 科學技術硏究所 1988 論文集 Vol.39 No.1

This experiment was conducted to study the effect of amino acid supplementation to two protein level of corn-soybean meal diets fed in late-pregnancy and lactation on the performance of sows and their litters. The experimental diets were consisted of 13% protein diet(T_1), 13% protein diet + 0.26% lysine + 0.10% methionine + 0.02% tryptophan(T_2), 15% protein diet(T_3), 15% protein diet + 0.02% tryptophan(T_4). Experiment was undertaken with 16 gestating sows for 80 days(50 days in late-pregnancy period and 30 days in lactation period). Some results watch were obtained with this experiment as follows: 1. There were no differences in body weight change of gestating sows during late pregnancy among the treatments. 2. Numbers of live-born piglets at birth were similar among the treatments. Birth weight of piglets by gestating sows fed 15% protein diet + 0.02% tryptophan(T_4) was the highest, but there were no significantly different among the treatments(P>0.05). 3. The highest weaning piglet body weigiht was 15% protein diet + 0.02% tryptophan (T_4) and the lowest was 13% proten diet(T_1). 4. the body weight change of lactating sows during lactation was affected by milk yield. Lactation weight loss was greater for sows receiving 13% protein diet(T_1) and lesser for 15% protein diet + 0.02% tryptophan(T_4). So, it may be concluded that tryptophan(0.02%) supplementation to 15% protein diet for late-pregnancy and lactation period would be the best performances. Lysine, methionine, tryptophan supplemention to 13% protein diet and 15% protein diet in late-pregnancy and lactation showed similar performances of sows and litters.

活生劑 添加가 肉鷄의 生産性 및 腸內 微生物菌叢에미치는 影響

辛炯泰,金基源,鄭棋煥 성균관대학교 생명과학자원연구소 1994 生命資源科學硏究 Vol.1 No.1

This experiment was conducted to determine the effects of yeast culture (CYC-100) and antibiotics (Enduracidin, Nicarbazin and Bacfeed) on the performance and small intestinal microbiota of broiler chickens. Arbor Acres strain broilers were used to measure body weight gain, feed intake, feed conversion ratio, and the colony counts of microbes (Lactobacillus, Coliforms and yeast) in the small intestinal contents of broilers. Two hundred forty hatched broiler chickens were divided into 20 birds per each replicate and three replicates birds were given each of the four dietary treatments:Control, 23% crude protein; Treatment Ⅰ (T- 1 ), 20% crude protein;Treatment Ⅱ (T- H ), 20% crude protein (0.2% yeast culture); Treatment Ⅲ (T-Ⅲ), 20 crude protein (0.2% antibiotics). The results of this experiment were summarized as follows: 1. Liveability of broilers was higher in supplementation groups of antibiotics and probiotics(yeast culture) compared with non-supplemental group. 2. Average daily weight gain of broilers was 42.68g for control, 38.40g for T-Ⅰ, 40.38g for T-Ⅱ and 40.32g for T-Ⅲ. 3. Daily feed intake was signigicantly higher in control group than other three groups. Yeast culture and antibiotics supplementation did not increase feed intake compared with non-suppelemental group. 4. Broilers fed diets supplemented yeast culture (T-Ⅱ) and antibiotics (T-Ⅲ) out-weighed those of the basal group (T-Ⅰ) by 82.9g (5.1%) and 80.5g (5%), and required 80g (3.92%) and 60g (2.94%) less feed per kg of gain, respectively, at the end of six weeks. 5. The number of Lactobacillus counts was increased tenfold and Coliforms counts was decreased tenfold with supplementation of yeast culture, but the number of Lactobacillus and Coliforms counts was decreased tenfold with supplemention of antibiotics in small intestinal contents of broilers. Yeast culture supplemented group tended to have greater number of yeast than other two groups.

大麥 및 白米 混合粉의 營養價値 硏究 : 第1報 보리의 搗精收率에 따른 營養價値 比較 硏究 Ⅰ. A Study on Some Nutritional Effects of Milling Recovery of Barley by Rats

辛炯泰,金永玉,具明子 成均館大學校 科學技術硏究所 1983 論文集 Vol.34 No.2

This experiment was conducted to observe the nutritional effects of milling recovery of barley (MRB) on the performance and digestibility by rats. Experiment was undertaken with 48 weanling male rats of Sprague-Dawley strain and they were evenly divided by 6 treatments, respectively, and feed and clean water were available, ad. libitum. In this experiment, the diets were consisted of corn starch+casein as control diet, 100%, 90%, 80%, 70% and 60% of MRB diet as experimental diets. For the experimental period, body weight gain(g), feed intake(g), feed efficiency ratio, protein efficiency ratio and digestibility (dry matter, organic matter, crude protein ; %) were measured to evaluate the nutritional effects of MRB diets for rats. The results which were obtained with this experiment as follows: 1. Average daily gain for 90%, and 100% MRB was 0.42g and for 70% MRB was 0.04g. And the differences between 80%, 90% and 100% MRB treatments and 70% and 60% MRB were significantly different(p<0.01). 2. Average daily feed intake was lower for 70% MRB of 3.41g and to increase the level of MRB tended to improve the feed intake, which followed the same pattern as the growth data. 3. Feed efficiency ratio was lower for 70% MBR of 0.01 and protein efficiency ratio was lower for 70% MRB of 0.15. 4. The range of dry matter digestibility was from 92.81% to 93.18%, organic matter digestibility was from 93.17% to 93.63% and protein digestibility was from 80.22% to 65.96% in 90%, 80%, 70% and 60% MRB, respectively. But there were no significant differences in dry matter, organic matter or protein digestibilities of experimental diets(p>0.01). And the digestibilities of dry matter, organic matter and crude protein for 100% MRB were significantly different compared with other treatments (p<0.01). So it may be concluded that 90% MRB would be the most nutritious processing method on the basis of feed intake, daily gain and protein metabolism by rats.

蛋白質 供給源이 흰쥐의 成長 및 窒素均衡에 미치는 影響

辛炯泰,金永玉 成均館大學校 科學技術硏究所 1985 論文集 Vol.36 No.1

This experiment was conducted to study the effect of protein supplementation to rice diet on growth, digestibility, nitrogen balance and nitrogen retention by growing rats. The experimental diets were consisted of rice diet (no supplementation of protein, I), soybean meal diet (II ), casein diet (III), fish meal diet (Ⅳ), lysine+threonine diet (V), 1/2 soybean meal+1/2casein diet (Ⅵ), 1/2 soybean meal+1/2fish meal diet (VII). Experiment was undertaken with 42 weanling male rats of Sprague-Dawley strain for 3 weeks and they were evenly divided by 7 treatments, respectively and feeds and clean water were available ad libitum. For the experimental period, body weight gain, feed intake, feed efficiency ratio, protein efficiency ratio, digestibility (dry matter, organic matter, crude protein), nitrogen balance and nitrogen retention were measured to evaluate the nutritional effects of protein sources. Some results which were obtained with this experiment as follows: 1. The average daily body weight gain for growing rats fed experimental diets(I-VII) were 0.95g, 2.03g, 2.97g, 3.27g, 2.48g, 2.71g, 2.77g, respectively. The highest body weight gain was fish meal diet (IV) and the lowest was sodbean meal diet (II). And the other diets ( III , V,Ⅵ,VII) showed similar weight gains. 2. Feed efficiency ratio (FER) was higher for fish meal diet (IV) and casein diet (III) than the other diets. And feed efficiency ratio of the other diets were similar. 3. Protien efficiency ratio (PER) followed the same pattern as the feed efficiency ratio. 4. Digestibilities of dry matter and organic matter were for casein diet (III) of 94.07%, 96.01%, respectively and soybean meal diet (II) of digestibilities of dry matter and organic matter 91.59%, 93.98% respectively. Protein digestibility showed the same pattern as the protein efficiency ratio. 5. The nitrogen balance and nitrogen retention of fish meal diet (Ⅳ) were higher than those of the rest of diets and soybean meal diet (II) was shown the lowest values. 6. As studies with rice diets by growing rats, protein supplementation to rice was superior to unsup plemented diet in performance, nitrogen balance and nitrogen retention. To compare the nutritional values of protein sources in this experiment, fish meal and casein as animal protein sources showed the highest performance, nitrogen balance and nitrogen retention. Combined animal protein and plant protein and lysine+threonine supplementation were the middle (performance, nitrogen balance and nitrogen retention) and soybean meal as plant protein showed the least (performance, nitrogen balance and nitrogen retention).

苛性소다 處理에 依한 볏짚 Silage 의 飼料價値 增進硏究

辛炯泰,朴昌學,金章鎬,金贊昊 成均館大學校 1981 論文集 Vol.30 No.-

Nylon bag dry matter digestibility (NBDMD, %) and nylon bag organic matter digestibility(NBOMD, %) were measured to evaluate the nutritive value of Tongil and Akibare rice straws ensiled after NaOH treatment by using Korean native male goats. Experimental Korean native male goat, weighing approximately 30㎏ each, was equipped with rumen cannula. Three grams of dried samples by grinding with 2.45㎜ Wiley mill screen were put into a bag 9×14 ㎠ made of 100 mesh nylon. Nylon bags were put into the ventral sac of the rumen and taken out at the end of 72 hours. They were washed, dried in an oven at 90-100℃ for 24 hours and weighed “NBDMD (%)” and ashed in an muffle furnace at 550-600℃ for 2 hours and weighed “NBOMD”(%)”. The results which were obtained with this experiment were as follows: 1. The NBDMD (%) and NBOMD (%) of NaOH-treated Tongil and Akibare silage were highly significant different (p〈0.01) in different levels of NaOH and variety of rice straw, but NBDMD(%) and NBOMD(%) were not affected by moisture content of rice straw silage (p〉0.05). 2. The relationship between NBDMD (Y_1, %) of Tongil and Akibare rice straw silage and NaOH concentration (X, %) at 72 hours rumen incubation was: Tongil rice straw silage (50%) : Y_1=4.70X+43.67 (r=0.96^*) Tongil rice straw silage (70%) : Y_1=4.61X+46.23 (r=0.99^**) Akibare rice straw silage (50%) : Y_1=4.61X+32.93 (r=0.95^*) Akibare rice straw silage (70%) : Y_1=4.97X+35.68 (r=0.97^*) 3. The relationship between NBOMD (Y_2, %) of Tongil and Akibare rice straw silage and NaOH concentration (X, %) at 72 hours rumen incubation was: Tongil rice straw silage (50%) : Y_2=4.74X+40.21 (r=0.97^*) Tongil rice straw silage (70%) : Y_2=4.05X+43.55 (r=0.99^**) Akibare rice straw silage (50%) : Y_2=4.24X+30.26 (r=0.95^*) Akibare rice straw silage (70%) : Y_2=4.34X+30.27 (r=0.97^*) 4. The optimum level of NaOH for improving NBDMD (%) and NBOMD (%) from Tongil and Akibare rice straw silage, on the basis of Blaster et al (1961), was 3% NaOH for Tongil and 4% NaOH for Akibare. But the optimum level of NaOH for rice straw silage, on the basis of Dr. McCullough's theory, was 6% NaOH for Tongil and Akibare. 5. The NBDMD (%) of ensiled NaOH-treated rice straw were more improved 20-30% than freshly-treated rice straw. It is concluded that the nutritive value of stored straw is higher than that of freshly-treated material.

苛性소다 處理에 依한 農産副産物의 飼料價値 增進硏究

辛炯泰,韓泳根,李光淳 成均館大學校 1982 論文集 Vol.31 No.-

A factorial experiment (6x5) involving 6 kinds of crop residues (barley straw, corn stover, rice straw, rye straw, soybean straw, wheat straw), 5 levels of sodium hydroxide (0,3,6,9,12%) was conducted with four Korean native male goats using a practical dairy cattle ration. Crop residues digestion was measured in situ with nylon bags containing test material in the rumen of the fistulated goats. Bags of 9×15㎠ made of 100-mesh nylon cloth were filled with one of ground crop residues to give 3-5g dry matter. These bags were put into the ventral sac of the rumen and taken out at the end of 72 hours. They were washed in cold water, dried at 105℃ for 8 hours and weighed. The straw dry matter remaining was calculated by difference and analyzed for organic matter. The results which were obtained with this experiment were as follows: 1. The nylon bag dry matter digestibility (NBDMD, %) and nylon bag organic matter digestibility (MBOMD, %) of NaOH-treated crop residues were highly significant different (P<0.01) in different levels of NaOH and kinds of crop residues. 2. The relationship between cell-wall constituents (Y, %) of crop residues and level of NaOH (X, %) was: Y=-1.63X+77.06 (r=0.99^**) 3. The optimum level of NaOH for improving NBDMD (%) from crop residues, on the basis of Shin et al (1981), was 0% NaOH for soybean straw, 3% NaOH for barley straw and wheat straw, 6% NaOH for corn stover and rice straw, and 12% NaOH for rye straw.

蛋白質 水準 및 供給源이 泌乳初期搾乳牛의 産乳量에 미치는 影響

辛炯泰,韓泳根,金秉泰,裵熙東,孫重天 成均館大學校 科學技術硏究所 1984 論文集 Vol.35 No.2

Eighteen Holstein cows capable of producing at least 23㎏ of milk per day were assigned randomly in equal numbers and fed one of three isocaloric total rations of 15.8 (soybean meal), 15.8 (urea), or 14.1% (urea) crude protein in dry basis. All cows were fed their assigned ration continuously for 63 days beginning on the 20 day postpartum. This experiment was designed to determine the influence of concentration and source of dietary protein on milk production(kg) and milk fat(%) during early lactation. The results which were obtained in this experiment as follows: 1. Milk yields (4.0% fat corrected milk, FCM) of cows for 42 day trial in early lactation were 23.80, 20.32, 18.44kg for the respective treatment. In this experiment the higher protein concentration (15.8% vs 14.1%) increased milk production, and source of protein influenced milk production. 2. Milk fat of 3.63, 3.52, and 3.39% showed that dietary protein concentration and source influenced milk fat in early lactating cows. 3. Income above feed cost for 42 day trial was greatest for the group fed the 15.8% crude protein from soybean meal (5,406 won/cow/day) and lowest for the group fed the 14.1% crude protein from urea (3,919.5 won/cow/day). income above feed cost for 15.8% crude protein from urea was 4,154.4 won /cow/day.

國産 제2인산 칼슘 添加가 브로일러의 生産性 및 燐의 利用率에 미치는 影響

辛炯泰,裵熙東,鄭棋煥 성균관대학교 생명과학자원연구소 1994 生命資源科學硏究 Vol.1 No.1

This experiment was carried out to compare biological availability of phosphorus(P) in locally produced dicalcium phosphate(DCP), tricalcium phosphate(TCP) and sodium acid phosphate (SAP) with 210 broiler-type chicks(Arbor Acres). Chicks were divided into 7 treatments consisted of DCP_1(low), DCP_2(high), TCP_1(low), TCP_2(high), SAP_1(low), SAP_2(high) and Control group for a period of 4 weeks. The results obtained are summarized as follows: 1. Liveability of Control, DCP_1, DCP_2, TCP_1, TCP_2, SAP_1 and SAP_2 were 90.0%, 96.7%, 96.7%, 93.3%, 93.3% 96.7% and 96.7%, respectively. 2. Body weight gain, feed intake and feed efficiency for 4 weeks feeding period were not significantly affected by the source of phosphorus supplements. However, it was found that chicks received DCP gained more body weight than the birds fed TCP or Control diet. 3. The relative biological availability of P in DCP, TCP and SAP fed broiler chicks were 98.1%, 94.23% and 100%, respectively. The results obtained from the present experiment indicated that the availability of P in DCP were better than that in TCP.

消石灰處理가 볏짚의 粗成分 및 消化率에 미치는 影響에 관한 硏究

辛炯泰,魏筍英,金永玉 成均館大學校 1981 論文集 Vol.29 No.-

Nylon bag dry matter digestibility (NBDMD, %), nylon bag organic matter digestibility (NBDMD, %) and chemical compositions were analysed to evaluate the nutritive values of 5 varieties of Ca(OH)_2-treated rice straws (Akibare, Tongil, Milyang 23, Yooshin and Suwon 264) by using Korean native male goats. Three grams of dried samples by grinding with 2.45㎜ Wiley mill screen were put into a bag 9×14 ㎠ made of 100 mesh nylon. These bags were put into the ventral sac of the rumen and taken out at the end of 72 hours. They were washed, dried in an oven at 105℃ for 24 hours and weighed "NBDMD" (%) and ashed in an muffle furnace at 600℃ for 2 hours and weighed "NBOMD" (%). The results which were obtained with this experiment were as follows : 1. Nylon bag dry matter digestibility (NBDMD, %) and nylon bag organic matter digestibility (NBOMD, %) of Ca(OH)_2-treated rice straws were highly significant different (p<0.01) in different levels of Ca(OH)_2 treatment and of different varieties of rice straws. 2. The relationship between total mean NBDMD (%, Y_1) of 5 varieties of rice straws and Ca (OH)_2 concentration (%, X) at 72 hours rumen incubation was : Y_1=1.51X+41.36 (r=0.97^**) 3. The relationship between total mean NBOMD (%, Y_2) of 5 varieties of rice straws and Ca(OH)_2 concentration (%, X) at 72 hours rumen incubation was : Y_2=1.36X+41.02 (r=0.95^**) 4. The orders of NBDMD (%) and NBOMD (%) for 5 varieties of rice straws were Yooshin, Suwon 264, Milyang 23, Tongil and Akibare, and Yooshin showed the highest values and Akibare showed the lowest values. Crude fiber, cell-wall constituents and lignin percent in the five varieties of rice straws were shown the negative relation to the NBDMD (%) and NBOMD (%).

톱밥의 飼料價値 增進硏究

辛炯泰 成均館大學校 科學技術硏究所 1986 論文集 Vol.37 No.1

This experiment was conducted to evaluate the nutritive value of Aspen sawdust by Korean native goats. Experimental diets were consisted of (Ⅰ) concentrate +0% NaOH-treated Aspen sawdust(90 : 10), (Ⅱ) concentrate+9% NaOH-treated Aspen sawdust(90 : 10), (Ⅲ) concentrate+0% NaOH-treated Aspen sawdust(80 : 20), and (IV) concentrate+9% NaOH-treated Aspen sawdust(80 : 20). The ruminating efficieny and chewing efficiency, rate of passage in the gastrointestinal tract, rumen pH, water consumption and apparent digestibilities by total fecal collection method were determined by 4 fistulated Korean native goats (♂), wighing approximately 32.3kg, respectively. The results which were obtained in this experiment were as follows: 1. The wave patterns on flow chart of eating of Aspen sawdust by experimental animals were very variable, but the ruminating patterns were disappeared. 2. Mean retention times(R) of treatments(Ⅰ-Ⅳ) were 47.8, 41.7, 46.9, 41.9 hours, respectively. 3. The rumen pH which were fed experimental diets(Ⅰ-Ⅳ) at 2 hours after feeding were 6.28, 6.91, 6.19, 6.99. respectively, and 6 hours after feeding were 6.55, 7.21, 6.21, 7.11, respectively. 4. Dry matter digestibility, and organic matter digestibility of treatments(Ⅰ-Ⅳ) were 78.44, 79.06, 72.52%, respectively, and 81.82, 81.93, 77.29, 76.20%, respectively. Crude protein digestibility of treatments (Ⅰ-Ⅳ) were 83.86, 85.33, 90.42, 90.28%, respectively. 5. Daily water consumption of treatments(Ⅰ-Ⅳ) were 631, 934. 889, 1.035ml, respectively.