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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 5, Issue 3 - Dec 1999
Volume 5, Issue 2 - Aug 1999
Volume 5, Issue 1 - Apr 1999
Selecting the target year
Study on the Physical Property of Stretch Film for Wrapping of Roughage
Journal of Animal Environmental Science, volume 5, issue 2, 1999, Pages 79~86
Recently more dairy farmers are interested in the utilization of stretch film for wrapping silage material. Most of stretch film are imported from abroad and one domestic product was developed, but its quality has not yet been tested. Therefore this study was executed to offer basic data on this material to the farmers. Measured items were tensile load, extension ratio, and tear propagation strength of stretch films. Comparisons were made among the white color of domestic product(Kw), and white(Fw), black (Fb) and green color(Fg) of foreign products. The result were summarized as follows: 1. Tensile loads of lengthwise direction in stretch films were 557.4, 377.4, 282.6 and 398.4kgf/
in Kw, Fw, Fb and Fg, respectively, and tensile loads of width direction were 415.9, 418.1, 360.2 and 433.0kgf/
in Kw, Fw, Fb and Fg, respectively. 2. Extension ratios of lengthwise direction were 650, 462.5, 512.5% and 537.5% in Kw, Fw, Fb and Fg, respectively, Extension ratios of width direction were 930, 962.5, 950 and 1,000% in Kw, Fw, Fb and Fg, respectively. 3 Tear propagation strength of lengthwise direction 187.9, 148.9, 157.3 and 142.8kgf/cm, and tear propagation strength of width direction were 141.4, 129.8, 140.4 and 106.6kgf/cm in Kw, Fw, Fb and Fg, respectively. 4. In the light transmittance, there was no difference between white and green color stretch film, but it was very low in black one. Therefore, it is thought that research on quality of roll bale silage treated with each stretch film would be needed.
Effect of Housing and Production System on Environment and Performances in Broiler Production
Journal of Animal Environmental Science, volume 5, issue 2, 1999, Pages 87~92
Three types of commercial broiler farms were surveyed to evaluate the effects of housing and production systems on environment and performances in broiler production. Environment condition of broiler house was better in windowless type than vinyl house. Ammonia, carbon dioxide and dust in vinyl house was 28ppm, 2,000ppm, 50.5CPM, respectively. Mortality was higher in vinyl house than that of widowless broiler house. Body weights at the age of 39 days were 1,551g, 1,607g and 1,620g of vinly house, open-sided broiler house and windowless broiler house, respectively. The incidence of abnormal carcass from the vinyl house was higher than those of the others.
Identification of Discrimination Factors for a Pig Noncontact Weighing System Using Image Data
Journal of Animal Environmental Science, volume 5, issue 2, 1999, Pages 93~100
Pig's original image data was transformed to a binary image, an image excluding head and tail portion from the whole binary image, and a projected image associated with pig's height. Then the length of body, width of shoulder, and area of pig were calculated and the relationships among the above characteristics and pig's weight were analyzed. The results obtained from this study were as follows: 1. Whole binary image data was considered to be improper to determine the pig's weight because the movement of pig's head and tail portion affected the image data. 2. Binary image data excluding head and tail portion from the whole binary image showed a better estimation of the pig's weight than the whole binary image. 3. Pig's should width was analyzed to be improper factor to determine the pig's weight. 4. The projected image associated with pig's height showed the highest correlation between the pig's area of the image and pig's weight(R2=0.9965). From this research the projected image associated with pig's height, which is excluding head and tail portion from the whole body of pig's image, was considered to be the prime factor to measure the pig's weight by the noncontact measurement.
Development of a Lignite Coal Heater for Livestock Facilities and Performance Test
Journal of Animal Environmental Science, volume 5, issue 2, 1999, Pages 101~106
This study was conducted to develop a lignite coal heater which can be used to livestock facilities and to test performance of the heater developed. Experimental results are as following: 1. Heating capacity of the heater was 85,000 kcal/h. 2. The concentrations of CO gas in the exhaust gas were the maximum of 759 ppm and the average of 319 ppm; for the concentrations of NOx, the maximum of 212 ppm and the average of 57 ppm ; for the concentrations of SO2 gas, the maximum of 302 ppm and the average of 99 ppm. As the values were less than the allowable concentration limites, they did not violate the air environment law. 3. Problems such as frequent interruption of fuel supply and bridge state were happened. Therefore, it was required that these should be resolved in the future.
The Effect of New Sawdust and Used Sawdust as a Litter Material for Broiler
Journal of Animal Environmental Science, volume 5, issue 2, 1999, Pages 107~112
This trial was carried out to compare the effect of fresh sawdust and 2 time used sawdust as a litter for Broiler. Broiler was reared from day old to 49 day. The depth. The depth of litter was 5cm in fresh sawdust and 2.5cm in used sawdust with adding 2.5cm depth of fresh sawdust, respectively. Moisture contents of litter and ammonia gas were not affected by litter treatment. The temperatures of litter were not influenced by the litter treatment; however, They were increased significantly at the age of 5 weeks of broiler reared in used sawdust litter(P<0.05). Weight gain, feed conversion and mortality was not influence between litter types. It is conclude that sawdust of litter material can be recycled saveral times as a broiler litter.
Thermal Transfer Properties of Composting Heat for Underground Heating in the Plastic Greenhouse
Journal of Animal Environmental Science, volume 5, issue 2, 1999, Pages 113~122
Basic Studies on Deodorization Management of the Efflux From Swine Slurry Treated by the Thermophilic Aerobic Oxidation(TAO) Reactor
Journal of Animal Environmental Science, volume 5, issue 2, 1999, Pages 123~132
This study was carried out to find deodorization management method of the efflux from swine slurry treated by thermophilic aerobic oxidation reactor. Three kinds of deodorization methods in Lab-scale reactors, were used in this experiment; No treatment, air injection treatment(50
) and inoculumn of photrophic bacteria treatement(108 cell(Most probable number, MPN)/
). The concentration of volatile fatty acids(VFAs), hydrogen sulfide(H2S), and ammonia(NH3) were analyzed during the treatment period(50 days). The major results obtained as follows. 1. Air injection method to efflux showed very high removal effect on malodorants such as VFAs, hydrogen sulfide(H2B). But ammonia(NH3) was emitted to much. 2. PTB inoculum method was also effective in removal of malodorants, VFAs, Hydrogen sulfide(H2S), when it was applied to the efflux. 3. We found that the concentrations of malodorants, VFAs, H2S, NH3 had some relatinships with the pH, ORP, BOD in the efflux.