• Journal of The Korean Society of Grassland and Forage Science
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• v.13 no.4
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• pp.286-293
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• 1993

This study was carried out to determine the effects of the fertilization levels and oversowing treatment on liveweight gain of glazing cattle, changs of botanical composition, and dry matter(DM) yield in tall fescue dominant mixed pasture during the grazing period. The treatments were T$_1$(low fertilizing; 120-100-100 kg/ha), T$_2$(medium fertilizing; 280-200-200 kg/ha) and T$_3$(medium fertilizing+oversowing). The botanical composition of tail festuce was increased in T$_1$ and that of tall fescue, orchardgrass and pernnial ryegrass in T$_3$ was 30.5%, 23.8% and 24.1%, respectively. The total forage DM yield was the highest in T$_3$, and the average stocking rate (animal unit; AU) per day during the grazing period in T$_1$, T$_2$ and T$_3$ was 2.4 AU. 3.0 Au and 3.3 AU, respectively. The total grazing days (animal unit day; AUD) in T$_3$(664 AUD) was higher than that of T$_1$, and T$_2$. There is no significant difference in average daily liveweight gain per head among the treatments but daily liveweight gain per ha in T$_3$ was higher than that of T$_1$, and T$_2$. The total liveweight gain per ha during the grazing period in T$_1$, T$_2$ and T$_3$ was 601kg. 762kg and 877kg, respectively. The herbage consumption per day per 100kg LW was similer among the treatments but crude protein, P, K and Ca contents in herbage were increased with medium fertilization levels(T$_2$) and with oversowing(T$_3$).

• Korean Journal of Poultry Science
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• v.14 no.1
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• pp.55-61
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• 1987

Four treatments were conducted to determine the effects of lighting regimes on the body weight gain and feed conversion of broiler chicks during 7 weeks: 1) 24 hours consistant lighting regime, 2) intermittent lighting regime of 1 hour lighting and 3 hours dark, 3) 20 hours lighting and 4 hours dark regime, 4) natural lighting regime. Each treatment was composed of three replications and 180 broiler male chicks were used in this experiment (45 chicks for each treatment,15 chicks for each replication). The results of this experiment were summarized as follows; 1. The body weight gains of 1 hour lighting＋3 hours dark regime were heavier than those of any other treatments during whole period, but no significant differences were found. In 1-4 weeks, the body weight gains of 1 hour lighting＋3 hours dark regime and 20 hours lighting＋4 hours dark regime were much heavier than those of natural lighting regime and 24 hours consistant lighting regime, but in 5-7 weeks, no differences were found among the 4 treatments. 2. The feed conversions of 1 hour lighting＋3 hours dark regime were improved more than those of any other treatments during whole period, but no significant differences were found. In 1-4 weeks, the feed conversions of 1 hour lighting＋3 hours dark regime and 20 hours lighting＋4 hours dark regime were much more improved than those of natural lighting regime and 24 hours consistant lightine regime, but in 5-7 weeks, no differences were found among the 4 treatments. 3. These results indicated that the intermittent lighting regimes such as 1 hour lighting＋3 hours dark and 20 hours lighting＋4 hours dark are more efficient on the body weight gain and feed conversion of broiler chicks than natural lighting regime and 24 hours consistant lighting regime.

• Korean Journal of Poultry Science
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• v.35 no.4
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• pp.399-405
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• 2009

Two experiments were conducted to establish the basic data of feeding system in cross-bred Korean native chicks. A total of seven hundred twenty chicks were replaced the 36 floor pen for the first five weeks with $3{\times}3$ factorial design in Experiment 1. Four hundred eighty of five weeks old chicks were raised from six to ten weeks of age with $3{\times}2$ factorial design in Experiment 2. Dietary ME and CP were formulated to contain 3,000, 3,050, 3,100 kcal/kg and 21, 22, 23%, respectively in Experiment 1 and 3,050, 3,100, 3,150 kcal/kg and 18, 19% in Experiment 2. Weight gain, feed intake were measured and calculated the feed conversion. Blood were collected and analyzed at the end of experiments. In Experiment 1, weight gain showed significantly higher in 3,050, 3,100 kcal/kg treatments than 3,000 kcal/kg treatment (P<0.05), but was not different in CP treatments. Feed intake was statistically high in 3,000 kcal/kg treatment compared with 3,050 and 3,100 kcal/kg ones (P<0.05), and more increased in 21% CP treatments compared to that of 22 and 23 CP treatment (P<0.05). Feed conversion of birds fed 3,050 and 3,100 kcal/kg diet showed much lower than 3,000 kcal/kg treatments (P<0.05). FCR was signicantly improved (P<0.05) in chicks fed diets containing 21 and 22% CP as compared to that fed 20% CP. Blood protein, glucose, and total cholesterol tended to increase in high energy and diet treatments. Blood HDL was increased as dietary energy increased, whereas LDL increased in low CP treatments. In Experiment 2, weight gain was not consistent between treatments, but more increased in 18% CP treatments compared to that of 19% CP treatment from six to ten weeks old in cross bred chicks (P<0.05). Feed intake was similar to the result of weight gain, but more increased in 19% CP treatment than 18% CP treatment (P<0.05). There were no statistically difference in FCR, but seemed to improve as dietary ME increased. Blood total protein and glucose increased as dietary CP was high, but triglyceride and HDL increased in high versus low ME (P<0.05). The results of these experiments suggested that optimum dietary ME and CP, were 3,050, 3,150kcal/kg and 22, 19% for the first five weeks and second one, respectively.

• Journal of the Korea Organic Resources Recycling Association
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• v.7 no.2
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• pp.65-71
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• 1999

This study was conducted to evaluate the feasibility of food waste as a feed resources by fermentation and fermented food waste as a substitute of rat feed on the performance with measuring the liveweight gain, feed consumption, feed conversion and digestibility Sixty-two grams Sprague-Dawley line 36 rats were allocated three treatments 12 rats of each(3replication ${\times}$ 4 rats). The substitution level of fermented food waste to commercial broiler feed were control, 0: 100: treatment I, 10: 90: treatment II, 20:80. The chemical composition of fermented food waste was appeared to follows : dry matter, 88.47% : crude ash. 12.95: crude protein, 20.82%; crude fiber, 13.62; ether extract, 9.15%. The body weight of treatment I and II at 1 weeks was significantly lower than those of control(p<.05) and weekly weight gain of control at 0-1 weeks was significantly higher than those of treatment I and II(p<.05). Those were higher in treatment I than those of rest groups at 1-2 weeks(p<.05). Total weight gain of treatment II was significantly lower than those of control and treatment I(p<.05) Total feed consumption of treatment II was significantly higher than those of control (p<.05) and weekly feed consumption of control and treatment II at 3-4 weeks was significantly higher than those of treatment II(p<.05). but those were higher in treatment I and II than those of control at 2-3 weeks(p<.05). Commutative feed conversion of treatment II was significantly higher than those of control(p<.05) and weekly feed conversion of treatment II and III at 0-1 weeks was significantly higher than those of control(p<.05) Dry matter digestibility of control and treatment I was significantly higher than those of treatment II(p<.05) and organic matter digestibility was higher in control than those of treatment II(p<.05).

• Journal of Animal Science and Technology
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• v.53 no.2
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• pp.119-126
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• 2011

The study was conducted to investigate the effects of dietary energy and protein levels on productivity and feed cost in crossbred chicks. Experiment was divided into starting (0~5 weeks), growing (6~10 weeks), and finishing (11~14 weeks) periods. Design of feeding trials was 3 ${\times}$ 3 factorial to feed different energy and protein levels for starting (ME 2,950, 3,000, and 3,050 kcal/kg CP 18, 19, and 20%), growing (ME 3,000, 3,050, and 3,100 kcal/kg CP 17, 18, and 19%) and finishing (ME 3,050, 3,100, and 3,150 kcal/kg CP 16, 17, and 18%) periods, respectively. In the starting period, weight gain and FCR was improved by dietary protein level (P<0.05). Interaction effect existed in feed intake and FCR (P<0.05). Weight gain was higher in 3,000 kcal/kg ME treatment than 3,100 kcal/kg ME treatment for growing period (P<0.05). In finishing period, feed intake was significantly decreased in ME 3,150 kcal/kg treatment than the other ME treatments (P<0.05). Feed cost/weight gain (FC/WG) was significantly decreased in chicks fed with 2,950 kcal/kg ME and 19% CP in starting period (P<0.05). For the growing period, FC/WG was notably increased in ME 3,000, 3,050 kcal/kg treatment than ME 3,100 kcal/kg treatment, and the FC/WG of CP 17, 18% treatment was significantly higher than CP 16% treatment (P<0.05). Thus, the optimum levels of ME and CP to improve the productivity and feed cost for starting, growing and finishing periods were 2,950 kcal/kg ME, 19% CP 3,000 kcal/kg ME, 18% CP and 3,100 kcal/kg ME, 17 or 16% CP, respectively.

• Korean Journal of Animal Reproduction
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• v.25 no.1
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• pp.35-42
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• 2001

This study was performed to elucidate the patho-physiology of copper-poisoned rats after consecutive oral administrations of the copper sulfate. The changes in feed and water intake, gains of body weight, blood pictures and mineral compositions of several organs were observed to measure the effects of copper poisoning. 1. Compared with control group, every experimental group of which 1,000, 2,000, or 4,000 ppm/kg of copper sulfate was administered displayed a gradual decrease in feed intake in dose-dependent manners. 2. After 1,000, 2,000 or 4,000 ppm/kg of copper sulfate administration, water intake seemed to decrease in every experimental group in dose-dependent manners, but there was little statistical significance. 3. After 1,000, 2,000 or 4,000 ppm/kg of copper sulfate administration, body weight decreased in every experimental group in dose-dependent manners. 4. After 1000, 2,000 or 4,000 ppm/kg of copper sulfate administration, the PLT values and numbers of RBC and WBC significantly increased after copper sulfate administration, but the values of Hb and PCV were lower than those of control group's. 5. After 2,000 or 4,000 ppm/kg of copper sulfate administration, the levels of Cu, Mn, Fe, Pb and Zn in the liver were lowered, but the levels of Mn, Fe, Pb and Zn in the kidneys increased except Cu levels.

• Journal of Animal Environmental Science
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• v.12 no.2
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• pp.51-60
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• 2006

Studies were carried out using growing to finishing pigs to investigate adequate floor space ($m^2/pig$) in Jeju environment. A randomized block design was used to compare the effect of pig performance on 3 stocking rates (low $0.56 m^2/pig$, medium 0.70 and high 0.90). Liveweight gain and feed intake were measured over a 4 week(Growth stage 1 and Growth stage 2) period or a 3 week(Growth stage 3) period. In growth stage 1 (43 to 65 kg body weight ; BW), daily weight gain was significantly higher in the medium stocking rate than in low or high (P<0.05). However, no significant difference in daily weight gain was found among treatments in growth stage 2(65 to 91 kg) or 3 (91 to 105 kg). Dressing percentage, back fat thickness and carcass grade were also not different (P>0.05). In conclusion, daily weight gain of pigs reared in medium density appeared to be higher than in the other groups during the early growing period which is $0.70m^2/pig$ and similar to that recommended by National Livestock Research Institute, RDA.

• Korean Journal of Food Science and Technology
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• v.43 no.2
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• pp.189-194
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• 2011

Effect of Sargassum confusum extract on the reduction of body weight gain and lipid contents in obese rats were evaluated to find natural materials with anti-obesity benefits. After inducing obesity by feeding 42.5% high-fat diet for 5 weeks, each 10 Sprague-Dawley rats were randomly assigned to high-fat diet control (HFD) group and high-fat diet group containing 3% Sargassum confusum extract (HFDSC). Weight gain of HFD group ($2.96{\pm}0.31g/day$) was significantly (p<0.05) higher as compared to that of normal diet (ND) group ($2.19{\pm}0.17g/day$). Weights of adipose tissues of HFD group were higher than those of ND group. Body weight gain of HFDSC group, however, was $2.36{\pm}0.24g/day$, which was significantly (p<0.05) lower by 21% than that of HFD group. In addition, weights of epididymal and perirenal adipose tissues were lower by 15% and 16%, respectively, as compared to those of HFD group. Biochemical analyses showed that concentration of triglyceride, total cholesterol, and fatty acids were significantly (p<0.05) lower in HFDSC group. These results suggest that Sargassum confusum extract has a high potential as an anti-obesity material by reducing weight gain and obesity-related factors in serum.

• Korean Journal of Poultry Science
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• v.33 no.3
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• pp.203-209
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• 2006

This study were conducted to evaluate effects of drinking concentrated liquid chitosan on performance of broiler. A total of 240 broiler chicks at 7 days of age were fed the commercial diet and water until 47 days of age, drinking water divided into three treatments, 0 ppm (control), 200 ppm (200) and 400 ppm (400) of concentrated liquid chitosan. The body weight gain and feed conversion ratio were not different by drinking concentrated liquid chitosan until 28 days of age, but body weight gain and feed conversion ratio were improve by drinking concentrated liquid chitosan over 28 days of age. Both body weight gain and feed conversion ratio were tend to improve and significantly improved (p<0.05) in 200 and 400 than control at 29 to 35 days of age, respectively. While body weight gain was tended to improve and significantly improved (p<0.05) in 400 and 200 than control at 36 to 47 days of age, respectively. There was a decrease in the microflora population of E coli. in the cecum contents and feaces of broilers by drinking concentrated liquid chitosan. This effect is higher in 400 than 200. The digestibility of dry matter and crude fat of feed were tend to increased in broiler by drinking concentrated liquid chitosan. Digestibility of crude protein of feed of broiler in 200 and 400 was significantly improved (p<0.05) as compared with those in control. These results indicated that when broiler chicks drinking concentrated liquid chitosan of 400 ppm, the improvement of the body weight gain, feed conversion ratio and feed nutrients digestibility, decreasing of microflora population of both E coli. and Salmonella in the cecum contents and feaces.

• Journal of Animal Science and Technology
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• v.44 no.3
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• pp.341-350
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• 2002

Twenty four Hanwoo bulls(mean initial body weight 162$\pm$8.1kg) were employed to induce the regression equations on body weight gain and dry matter intake. The diets were fed in a 3${\times}$4 factorial arrangement; three roughage sources(rice straw, hay, corn silage) and four roughage ratios in ration(100, 60, 40, 20%). Bulls were alloted by incomplete turn over design with four replications. Daily body weight gain was greatest in bulls fed the corn silage as a roughage source and the 20% of roughage ratio, respectively. Bulls fed hay or corn silage only as feed kept in their body weight gain during the whole experimental period, however those fed rice straw only were in a negative body gain hereafter fatteningⅠperiod(350kg of body wt.). Dry matter intake per metabolizable body weight was decreased with increasing body weight. Dry matter intake was greatest in bulls fed the corn silage as a roughage source and the 20% of roughage ratio, respectively. The regression equations on daily body weight gain(DG, kg) and dry matter intake(DMI, kg/day) according to body weight(BW, kg) of Hanwoo bulls were derived as follows; DG = －0.842 + 17.5DMI/$BWkg^{0.75}$ DMI = 4.125 + 0.013BW + 1.075DG － 0.045NDF where, NDF is the percentage of neutral detergent fiber in ration.