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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Animal Environmental Science
Journal Basic Information
Journal DOI :
Korean Association for Livestock Housing and Environment
Editor in Chief :
Volume & Issues
Volume 3, Issue 2 - Dec 1997
Volume 3, Issue 1 - Jun 1997
Selecting the target year
Combined Effects of VFA Composition of Rumen Fluid and Heat Exposure on General Clinical View and Insulin Secretion Response in Sheep
Journal of Animal Environmental Science, volume 3, issue 1, 1997, Pages 1~12
This study was conducted to investigate the combined effects of VFA composition of rumen fluid and heat exposure (30
) on the general clinical view and insulin secretory response to glucose in sheep. The total infusion of nutrients was examined in sheep via the technique of continuous alimentation. Four adult Suffolk sheep fitted with a permanent ruminal cannula and a simple T-shaped duodenal cannula were used. A peristaltic pump was used to infuse the solutions of volatile fatty acid triglycerides (VFA-TG) consisting of 70 triacetin : 20 tripropionin : 10 tributyrin (low propionin division: LP) and 50 triacetin : 40 tripropionin : 10 tributyrin (high propionin division: HP) on the basis of energy and minerals into the rumen, and casein solution into the duodenum. The effects of heat exposure and type of the levels of VFA-TG solutions on the insulin secretory response to glucose in sheep were investigated by using hyperglycemic clamp (HGC) technique. The results obtained are summarized as follows: 1. During the heat exposure (latter half of the infusion period), respiration rate, heart rate and rectal temperature increased (P＜0.01, P＜0.01, P＜0.05), but the levels of VFA-TG solutions (LP and HP division) did not affect the general clinical view except for the heart rate. 2. In the HGC technique, glucose infusion rate (GIR) and mean plasma insulin increments (MPII) tended to be ower in the heat exposure than in the thermoneutral environment, but no significant difference was found among the treatments. GIR and MPII remained unchanged between the levels of VFA-TG solutions. 3. In the HGC technique, ratio of MPII to GIR (MPII/GIR) which represents pancreatic
-cell response to glucose stimulation remained unchanged among the treatments.
Changes of Physicochemical Parameters During the Aerobic Composting Process of Swine Manure
Journal of Animal Environmental Science, volume 3, issue 1, 1997, Pages 13~18
This study was conducted to investigate the physicochemical changes during the aerobic composting of swine manure mixed with bulking agent, sawdust(v/v, 1:1), in a full-scale composting plant using rectangular escalator-aginated bed composting system. Physical and chemical properties were analyzed on the samples which were collected at 5, 15, and 25 day of composting, curing and final step. The results of this study were summarized as follows; 1. Moisture and K2O content, and pH of final step were higher than those of 5th day of composting (p＜0.05). 2. Ammonium nitrogen, total organic corbon and organic matter content, and electrical conductivity(EC) were significantly decreased (p＜0.05) but nitrate nitrogen, ash and P2O5 content increased(p＜0.05) throughout the aerobic composting process. 3. Total organic carbon per total nitrogen(C/N) and total organic matter per total nitrogen(OM/N) ratio were significantly decreased throughout the aerobic composting process(p＜0.05). 4. Physical and chemical properties of swine manure were varied by aerobic fermentation using rectangular escalor-aginated bed composting system.
Effect of Industrial Wastes as a Bulking Agent on the Composting of Swine Manure
Journal of Animal Environmental Science, volume 3, issue 1, 1997, Pages 19~26
Composting has recently become popular as a means of recycling swine manure into products for sale off the farm, but bulking agent(usually sawdust) are expensive and availability is limited. This experiment was conducted to investigate the effect of fly ash as a bulking agent on the composting of swine manure and to analyze the effective substitution rate of fly ash mixed with swine manure for sawdust. Fly ash was able to be substituted for sawdust and the most effective substitution rate are 50% of sawdust. According to the results the advanced research and development are required, the effect of swine manure with fly ash on the soil properties, forage composition and animal performance.
Study on the Composting of Swine Manure using Wood Chip as a Bulking Agent
Journal of Animal Environmental Science, volume 3, issue 1, 1997, Pages 27~34
This study was carried out to evaluate the feasibility of composting of swine manure with wood chips as a bulking agent. To evaluate the optimum blending ratio of wood chip to swine manure three levels of wood chip such as 100, 150, and 200% were blended on a volume basis with 100% of swine manure was used to determine the effect of wood chip compared with sawdust as a bulking agent on composting. The maximum temperature reached during composting was 70, 58, 48, 72
at blending ratio of 100, 150, 200, and 50WC+50SD%, respectively. The bulk density of compost was increased extremely with increasing the blending level of wood chip. The C/N ratio of final compost ranged from 18.25 to 19.82 . Heavy metal contents in the final compost were in the range of 0.05∼0.16 mg/kg, 5,86∼10.95
/kg, and 295∼440 mg/kg for Cd, Hg, and Cu, respectively. It was concluded that the blending ratio of 200:100 of wood chip and manure by volume was satisfactory for swine manure composting.
The Fertilizing Effect of the Long-Time Aerated Animal Wastewater for the Paddy Rice
Journal of Animal Environmental Science, volume 3, issue 1, 1997, Pages 35~42
The purpose of this study is to investigate the effect of the biologically treated animal wastewater as a liquid fertilizer in the paddy rice. The treated water has content of the ammonia nitrogen 24mg/I and nitrate 40 mg/I on an average in the first year. A trace of nitrite has been shown. The phosphate content was 92 mg/I on an average. The amount of yielded rice was 365kg/10a for test 1 (no fertilizer), 388dg/10a for test 2(chemical fertilizer), 526kg/10a for test 3 (treated water) respectively. The treated water showed 35% more in production than the chemical fertilizer. The treated water has content of the ammonia nitrogen 40mg/I and nitrate 67mg/I on an average in the second year. A trace of nitrite has been shown. The phosphate content was 57mg/I on an average. The amount of yielded rice was 402kg/10a for test 1, 505kg/10a for test 2, 607kg/10a for test 3 respectively. Yield of unhulled rice was 20% more in the plot of treated water than that of chemical fertilizer.
The Effect of the Application Levels of Slurry and Urea on Productivity of Silage Corn
Journal of Animal Environmental Science, volume 3, issue 1, 1997, Pages 43~48
This experiment was conducted for the effects of application levels of slurry and urea on the production of silage corn. The result was as follows; 1. DM yield of silage corn was the highest in the 100kg/ha level of urea and 160kg/ha of slurry. 2. Crude protein content was increased with increasing slurry and urea. 3. Total N production was increased continuously with increasing slurry in the 100kg/ha of urea, however, it was not affected by 200kg of urea. 4. NDF content was not affected by an application levels of slurry and urea.
A Normative Analysis on Broiler Farm investment in Korea
Journal of Animal Environmental Science, volume 3, issue 1, 1997, Pages 49~56
Most of Korean broiler farms are constructed with vinyl houses. Such types of broiler farms might be cheaper in terms of cost, but poor in terms of environment condition. According to enlargement of broiler farm size, high value production systems or automatic facilities are introduced in this field. However, investment may not always guarantee the profit of the management. Therefore, it is necessary to undertake the investment analysis before decision making for the investment. Under the assumption that 870 Pyoung(≒$3.3㎡) of a broiler farm within 1,740 Pyoung(≒3.3㎡) of land is built with the producing capacity of 50,000 heads of chicken in a time. The total investment is calculated to be 600 million won(1,000 won≒$1.1), and out of them 58.1% is provided by the owner, 31.6% from the government loan, 5.8% from government subsidy, and 5.3% from other agencies or banks. The expected profit of the broiler farm is 64.6 million won(1,000 won≒$1.1) per year. The IRR calculated is 0.0808 which means that the rate to profit of this project would be 8.1%. This also means that for this investment the interest rate of the capital provided should be less than 8.1% per year. Considering that the current opportunity cost of the own capital is 8.5% this project is not so attractive for those who is going to build broiler farms mainly with their own capital. In other words this project would not be profitable, unless the average interest rate of the loans provided for this project is less than 8.1% per year.