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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 6, Issue 3 - Dec 2000
Volume 6, Issue 2 - Aug 2000
Volume 6, Issue 1 - Apr 2000
Selecting the target year
Field Survey of structural and Environmental Characteristics of Pig Houses in the Southern Provinces in Korea
Journal of Animal Environmental Science, volume 6, issue 1, 2000, Pages 1~14
The structural and environmental characteristics of typical pig houses in different growth phases were surveyed and analyzed. Based on the data for thirty nine selected farms in four provinces, Jeonbuk-do, Jeonnam-do, Gyeongbuk-do, and Gyeongnam-do, in the southern provinces, Korea, the goal is to eventually establish standard pig houses of sow and litter, nursery pigs, and growing-finishing pigs. The survey included farm scale, production specialization, structural dimensions of the houses and their ventilation systems, cooling and heating systems, and floor and pit systems related to manure collection. The survey showed 90∼98% of growing-finishing pig houses adopted the sidewall curtain systems. The sidewall curtain systems, although popular, is not well insulated which leads to excessive heating costs in winter. Regarding flooring and manure collection system of the house, 23∼35% of growing-finishing houses installed scraper systems with concrete-slat floors in Gyeongsang provinces while 52∼78% did in Jeolla provinces. The cause of a large variance in flooring between tow regions could not be academically pinpointed, rather it could be attributed to the advice of neighbors who leads local pig production circle. A general trend toward enlargement and enclosure of pig houses for all growth phases was gaining popularity in most regions in recent years. A steady shift to multisite operation from continuous operation was also observed to prevent a disease transfer. The structural design of a standard pig house with its environmental control systems including ventilation and heating/cooling system was suggested for further validation study. In-depth analysis of the survey data is presented in the Results and Discussion section
Development of a Monitoring and Forecasting System for the Delivery of Pregnant Sow
Journal of Animal Environmental Science, volume 6, issue 1, 2000, Pages 15~22
A monitoring and the forecasting system for the swine delivery was developed using CCD camera multi-function board microphone and data-recorder equipped on a personal computer. For the swine delivery monitoring and forecasting factors four factors were selected such as genitalia swine body shape breast color and sound. Image of physical variation of body shape, shape and color of genitalia area and color of breast of pregnant sow were grabbed using the CCD color camera and multi-function board and variation of voice of pregnant sow was acquired using microphone and data recorder. Acquired information of image and voice were analyzed using a custom developed algorithm and program. The result of the forecasting efficiency of swine delivery was 89%, 71% and 100% using the variation of genitalia are the body shape and the voice of pregnant sow. respectively. The efficiency of image processing was 100% for the delivery detection when the piglet was delivered half of its body from genitalia of pregnant sow, The monitoring and forecasting system informed the estimated time of the delivery of swine to a farm manager immediately if an estimated and established time set by the farm manager was the same and/or the estimated time ws earlier than the established time and the system detected the delivery.
Development of a Automated Noncontact Weighing System for Pigs
Journal of Animal Environmental Science, volume 6, issue 1, 2000, Pages 23~30
A automated noncontact weight system for pigs consisted of a CCD-type video camera and 10 photo sensors connected to a computer. In the experiment 20 pigs(Large Yorkshire
Landrace breed) weighing from 95kg to 115kg were used. Pig's original image data was transformed to a binary image an image excluding head and tail portion from the whole binary image and the area of pig was calculated. Then pig's volume was calculated by multiplying the area by the body hight measured with photo sensors. The correlation equation between the above volume(x) and pig's weight was y=0.0007 x -9.2152(
=0.9965) Performance of a automated noncontact weighing system for pigs was tested with this equation. The results showed
0.65kg average error and 1.63kg maximum error. It was concluded that performance of a automated noncontact weighing system is excellent.
Effects of Dietary Supplementation with Tetrachlorvinphos of Fly Control in Pig Feces
Journal of Animal Environmental Science, volume 6, issue 1, 2000, Pages 31~36
A feeding trial with a total of 24 growing pigs of average 33.47kg body weigh was conducted to investigate effects of dietary supplementation with Tetrachlorvinphos on swine growth and fly control. The Experimental animals were divided into two groups of 12 gigs, 3 replicates of 4 animals each. Body weight gains and feed conversion rates were no differences between control and treatment. Maggot and fly populations were significantly reduced (P<0.05), respectively.
Analysis of the Spreading uniformity of House Slurry Spreader
Journal of Animal Environmental Science, volume 6, issue 1, 2000, Pages 37~44
A new hose slurry spreader with improved spreading uniformity is developed to distribute the slurrynear to the soil surface and to reduce odor problems. The precision of distributed slurry was investigated using 3 types of slurry and found to be dependent on the rotor speed. For the solid matter separated fluid containing 0.1% of dry matter rotor speed of 150 rpm showed best uniformity with CV of 10% In the case of slurry from dairy cattle which contains 8.2% of dry matter high rotor speed of 330 rpm showed best result with CV of 7.2% Also swine slurry which has a 13.6% of dry matter content showed the best result of 8.1% CV at the high rotor speed of 250rpm. A high rotor speed generates enough pressure in the central distributor and as a result uniform distribution of slurry can be achieved. In conclusion it is highly recommended rotor speed of 300 rpm to get the best performance.
Influences of Phosphorus Content and Phytase Activity from the Vermicomposting Environment
Journal of Animal Environmental Science, volume 6, issue 1, 2000, Pages 45~52
The effect of earthworm on the recycling or control of organic P in environment has been investigated. The activity of phytase(myo-inositol hexaposphate phosphohydrolase, EC 22.214.171.124) produced by isolated microoganisms from vermicomposted cow manure was usually higher than that of phytase produced by isolated microorganisms from composted cow manure. However the activity of phytase excreted by seperated earthworm(Eisenia foetida) was not detected. The concentration of total P and available P was revealed 2.88%, 0.22% in composted cow manure and 1.70% 0.14% in vermicomposted cow manure.
Effect of Application level of Liquid Cattle Manure on the Run-Off Water and Soil Properties in Mixtures Swards
Journal of Animal Environmental Science, volume 6, issue 1, 2000, Pages 53~58
A manure management plan is important for all daily operations. This study was conducted to investigate the effect of application level of liquid cattle manure on the soil properties and changes of BOD and COD content in run-off water at the mixtures swards of National Livestock Research Institute RDA Suweon in 1995. The experiment was arranged in a randomized block design with five treatments consisting of no fertilizer chemical fertilizer application of 40, 60 and 80MT/ha as liquid cattle manure. The quantity of run-off for a no fertilizer was the highest of 1,469.4mm but that for a application level of liquid cattle manure of 60MT/ha was the lowest of 1,278.1mm. The change of BOD in run-off for a no fertilizer was the lowest of
, but that for a application level of liquid cattle manure of 80MT/ha was the highest of
. Change of COD in run-off for a no fertilizer was the lowest of
but that for a application level of liquid cattle manure of 80MT/ha was the highest of
. Available phosphorus and total-N content of soil chemical properties was higher at liquid cattle manure than chemical fertilizer.