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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 8, Issue 3 - Dec 2002
Volume 8, Issue 2 - Aug 2002
Volume 8, Issue 1 - Apr 2002
Selecting the target year
Development of an Electronic Identification Unit for Automatic Dairy Farm Management
Cho, S.I. ; Ryu, K.H. ; An, K.J. ; Kim, Y.Y. ; You, G.Y. ;
Journal of Animal Environmental Science, volume 8, issue 2, 2002, Pages 63~72
In Korea, a need of automatic dairy farm management system has been increased to lower production cost and to strengthen international competition. However, the present management system was mostly relied on foreign technologies and caused some problems in post management and after-sales services. Therefore, though there is a problem of price and quality at present, domestic technologies of the management system should be developed for the long run. This study was conducted to develop an electronic identification unit for an automatic dairy farm management system. The developed system was consisted of a tag, a reader, a switching circuit, and a personal computer. The tag attachable to each individual cow was developed to transmit individual radio frequency(RF) code into the air with modulation of ASK(amplitude shift keying). And the switching circuit was added to avoid confusion on reception and transmittance. The reader attached to a feeding device was developed to transmit activating signal periodically and to identify code of the individual tag when the tag was approached to the device. The reader was consisted of an active filter, a detecter, a comparator and a microcontroller. The test result was feasible enough to apply it for the automatic farm management system and the identified maximum distance was about 37cm.
Analysis of Ventilation Efficiency by Duct System in Pig House
Song, J.I. ; Yoo, Y.H. ; Lee, D.S. ; Choi, H.C. ; Kang, H.S. ; Kim, T.I. ; Jeon, B.S. ; Park, C.H. ; Kim, H.H. ;
Journal of Animal Environmental Science, volume 8, issue 2, 2002, Pages 73~78
The experiment was carried out to investigate the optimal air velocity for improving the ventilation efficiency of duct ventilation system used in Korean swine building. The results are followed ; In 2.2 m height of duct, the air velocity of hole was 5.0 m/s as the over level of recommendation. In different hole interval, the air velocity was various of 4.6
11.6 m/s in narrow hole interval, 5.4
10.9 m/s in broad hole interval. But the air velocity was 6.6
7.7 m/s in duct system pierced hole with equal interval, and it was equal velocity in different parts of duct in this hole interval.
Effects of Ventilation Types on Interior Environment of the Enclosed Farrowing-Nursery Pig House
Yoo, Y.H. ; Song, J.I. ; Kang, H.S. ; Jeon, B.S. ; Kim, T.I. ; Kim, H.H. ;
Journal of Animal Environmental Science, volume 8, issue 2, 2002, Pages 79~86
This study was conducted to collect basic data about the effects of ventilation types on the interior environment of the enclosed farrowing-nursery pig house in Anseong, Icheon and Jeungpyong. Surveyed ventilation types in the enclosed farrowing-nursery pig house are classified in to 4 types. In V1 type, air enters through a planar slot inlet placed on the juncture of the entering wall and exit through the chimney fan outlet; in V2 type, air enters through a perforated ceiling inlet and exits chimney fan outlet(V2); in V3 type, air enters through a circular duct inlet and exit chimney fan outlet(V3); in V4 type, enters through a circular duct inlet and exits side wall exhaust fan outlet(V4). Temperature, relative humidity, air velocity and ammonia concentration(
) were measured in the interior of swine building in the summer. Interior temperature was not remarkably different in all ventilation types in this study. However, temperature of the V4 was somewhat lower than that of the other types. Air velocity of the V4 was higher and
concentration of the V4 was lower than those of other ventilation types. It is suggested that the V4 ventilation type be applicable in the enclosed farrowing-nursery pig house in Korea.
Evaluation of Nutritional Characteristics of Different Sources of Food Residues in Autumn and Comparisons with NRC Nutrient Requirements for Swine
Kwak, W.S. ; Kang, J.S. ; Chung, J.D. ;
Journal of Animal Environmental Science, volume 8, issue 2, 2002, Pages 87~98
This study was conducted to determine nutritional values of different sources of food residues(FR) released in autumn and to compare them with nutrient requirements on NRC standard feeding system of swine. Hospital or cafeteria FR contained more cooked rice and side dishes residues and less vegetable residues and fruit peel, resulting in higher energy and lower fiber contents, compared to apartment complex FR, which had opposite patterns to these results. Chemical composition between hospital and cafeteria FR was almost similar. Salt(NaCl) content was more than 9 folds of NRC swine requirement, but much lower than the maximum tolerant level. Essenial and non-essential amino acids profile was similar among FR sources. Hospital or cafeteria FR protein had a similar pepsin digestibility to soybean meal protein. Apartment complex FR protein, however, had a much lower pepsin digestibility. When NRC nutrient requirements are considered, FR in swine diets could satisfy requirements of protein and all the essential amino acids, 75
111% of digestible or metabolizable energy, and most of the major and minor minerals. All the FR contained extremely low levels of toxic heavy metals, indicating that they are completely safe from these toxic substances. It was concluded that hospital or cafeteria FR could be a nutritionally excellent and balanced feed source for swine.
A Study on the Requirement of Tractor Pulling Force of Slurry Manure Spreader for the Utilization in Paddy Field
Oh, I.H. ; Kim, K.D. ;
Journal of Animal Environmental Science, volume 8, issue 2, 2002, Pages 99~106
This study was conducted to improve utilization efficiency of slurry and choose a suitable type of tractor power which can be attached by manure spreader in the paddy field. In the paddy field, the pulling force for the spreader was measured by using a measurement system installed between tractors with and without the spreader. The soil moisture contents at the 0
10cm and 10
20cm depth of test soil(SiCL) were 28.45% d.b. and 23.47% d.b., respectively in average while Cone Index at l0cm and 15cm depth were 14.5kPa and 16.2kPa, respectively. It was impossible to measure the soil moisture contents and Cone Index below 20cm depth of the soil because the hardness of the soil increased greatly. Thereafter, hard pan of the sampled soil was found at 15
20cm depth. While the required power only for the dragged tractor was found to be 3.44kW in the test field, the required pulling powers of tractor considering the pumping were 8.48
20.96kW, respectively for 2 tons, 3 tons, and 4 tons of tank capacity. As the tank capacity increased, the sinkage of soil were also increased to 7cm, l0cm, and 12cm, respectively for the tractors with 2 tons, 3 tons and 4 tons of tank capacity. Considering about 60% of pulling efficiency of tractor, a tractor which had lower than 25.74kW of pulling power was suitable to pull the spreader and spread the slurry simultaneously for manure spreader with 2 tons of tank capacity. 29.42kW
36.78kW of pulling power was found to be optimum for the tractor with 3 tons of tank capacity while over 40.45kW for 4 tons of tank capacity.
Quantity and Characteristics of Manure Produced Holstein Dry Cow
Choi, D.Y. ; Kang, H.S. ; Kwag, J.H. ; Choi, H.C. ; Kim, J.H. ; Kim, T.I. ; Park, C.H. ; Jeon, B.S. ; Han, J.D. ;
Journal of Animal Environmental Science, volume 8, issue 2, 2002, Pages 107~110
This study was carried out to investigate the quantity of Holstein dry cow manure excreted and their characteristics. The results obtained in this study were summarized as follow; The average body weight of the Holstein dry cow during experiment was 619.9kg. The feed intake(DM basis) and water consumption was 10.7, 38.6kg/day/head, repectively. The manure production of Holstein dry cow was 44.8kg/day/head (feces 26.9, urine 17.9kg). The moisture content of feces and urine was 84.5%, 95.3%, respectively. Wastewater pollutant concentration of
(Biochemical Oxygen demand),
(Chemical Oxygen demand), SS(Suspended Solids), T-N(Total Nitrogen) and T-P(Total Phosphorus), excreted from Holstein dry cow was 16,874,55,763, 87,333, 2,353,
in feces and 5,621, 8,673, 518, 2,423,
in urine, repectively. The fertilizer content of manure, N(Nitrogen),
(Phosphoric acid) and
(Potassium oxide) was 0.24, 0.08, 0.15% in feces and 0.24, 0.001, 0.30% in urine, respectively.
Characteristics and Quantity of Slurry Produced by Swine Slurry Farms
Kwag, J.H. ; Choi, H.C. ; Choi, D.Y. ; Kang, H.S. ; Park, C.H. ; Han, J.D. ; Jeon, B.S. ; Kim, H.H. ;
Journal of Animal Environmental Science, volume 8, issue 2, 2002, Pages 111~114
This study was conducted to determine the volume of pig slurry productinn and the characteristics from 4 swine farms. For the composition of pig slurry produced, contents of N,
, were 0.13, 0.25 and 0.13% in slurry, respectively. Water pollutant concentration in slurry of swine farms,
, SS, T-N and T-P, was
, respectively. The average volume of pig slurry was 6.30
in spring, 6.69
in summer, 6.09
in autumn, and 6.12
in winter. The average moisture content of slurry was 95.8%. The composition of slurry produced by pig farms.
Effects of Pig Manure Composting on Dinitrogen Oxide Emission
Jeon, B.S. ; Kim, T.l. ; Yoo, Y.H. ; Park, C.H. ; Kwag, J.H. ; Choi, D.Y. ; Kim, H.H. ; Lee, H.J. ; Sin, Y.K. ; Kim, G.Y. ;
Journal of Animal Environmental Science, volume 8, issue 2, 2002, Pages 115~118
This study was conducted to determine the effects of pig manure composting on emission of dinitrogen oxide (
) that is greenhouse gas. Fresh pig manure was mixed with sawdust as bulking agent and moisture content of mixed compost was adjusted by 61.9%. After mixing bulking agent with pig manure that was left to compost with aeration in composting chamber for an initial period of 30 days. At the end of this period, that was decomposed and a second period of composting was conducted without aeration for 60 days. Temperature during the initial composting period was above
for 7 days. Moisture reduction rate by composting pig manure was 36.7%.
Produced during composting was 0.043g/T-Ng.
Studies on Moisture Evaporation and Economical Analysis for Composting of Piggery Slurry
Park, C.H. ; Yoon, T.H. ; Ryoo, J.W. ; Kim, J.H. ; Choi, T.B. ; Choi, D.Y. ; Kwag, J.H. ; Jeong, K.W. ; Kim, H.H. ;
Journal of Animal Environmental Science, volume 8, issue 2, 2002, Pages 119~124
To evaluate composting process of piggery slurry, we made
bench scale composting reactor, and investigated the input and output of mass, moisture evaporation, volatile solid degradation, and running cost. For 15 days experimentation the results was as followed, The quantity of sawdust used was 0.47ton(18,000won) per 1ton slurry. The amount of moisture evaporated was 16.8kg/kg VS degradated. Total evaporation and VS degradation were 24.8%, 5.7% respectably. To analysis the running cost of that, we included only two factors, sawdust cost and compost income. The compost price to sell was 63won/kg(50% of market price) it made 8,694won income to 756 won loss, but 25won/kg, it was
loss per 1 ton slurry in the current pig farmer's condition. This cost was
of pig production cost and damage strongly to pig farmers to treat it.