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오존 처리가 자돈사내 공기의 질과 자돈의 성장 효율에 미치는 영향
김광위,우종화,이철영,김두환 한국동물자원과학회 2003 한국축산학회지 Vol.45 No.6
The present study was performed to investigate the effect of ozonation of the swine nursery building on indoor air quality and growth efficiency of the weanling piglets. Forty 21-day-old, cross-bred weanling piglets were housed in two ozonated or unozonated pens(10 males and 10 females per pen) for 3 wk alternately in a swine nursery building and this procedure was repeated three times, Ozone was generated using a commercials apparatus outside the nursery building and infused into the nursery building through a duct at a level of 0.03?. Indoor concentrations of harmful gases were measured at 2-h intervals for a 24-h period per each 3-wk feeing trial. Indoor ammonia and carbon dioxide gas concentrations were reduced by the ozonation(p<0.01) by 21% and 7% respectively, compared with those of the control(unozonation), although hydrogen sulfide concentration was not affected by the treatment.
임신돈의 수용형태와 산차가 임신, 분만 및 비유기간 중 모돈의 행동과 분만성적에 미치는 영향
김두환,박종렬,우종화 한국동물자원과학회 2003 한국축산학회지 Vol.45 No.6
This study was designed to determine the effect of gestation housing and parity on the farrowing performance and behaviour of sows during pregnancy, farrowing and lactation periods. Total 18 Duroc sows were randomly assigned after 4 weeks of gestation to either individual gestation stall or a groups of three with pen gestation system for three parities(1st, 2nd ~ 3re, and 4th ~ 5th). Approx-imately 7 days before predicted farrowing date, sows were transferred to farrowing crates where they remained until 21 days post-partum. Behaviour was recorded on day 60 and 90 pergnancy for 24 hours, on day of farrowing for farrowing duration and on day 10 of lactation for 2.5 hours in the farrowing crate. The results obtained from this study were summarized as follows : On 60 and 90 day of pregnancy, all sows in both groups made attempts for ventral lying more than for other postures. Sows in the group gestation pen spent more time on walking than those in individual gestation stall(p<0.01); however, the group housed sows were spent less time on drinking that the individually housed sows(p<0.01)). There was no significant differences between gestation housings in the occurrence of stereotypy of pregnant sows. On day 60 of pregnancy, sows in the individual gestation stall showed the highest frequency of vacuum chewing and bead weaving. However, floor licking and bar licking behaviours were highest in day 90 pregnatn sows individually housed. The sows individually housed during the gestation period spent more time on sitting and eating an the day of farrowing in the farrowing crate than the sows group housed. On day 10 of lactation in the farrowing crate, the group housed sows during the gestation period made significantly more attempts for ventral lying than sows individually housed. In conclusion, the occurrence of stereotypy of sows during the gestation and lactation did not differ between gestation housings and farrowing performance of sows during the gestation period was not affected by gestation housing. Thus, the group housing for pregnant sows is a feasible menas to improve welfare of sows and to increase the normal behaviour of sows.
김두환,김광위,우종화 진주산업대학교 농업기술연구소 2001 農業技術硏究所報 Vol.14 No.-
This experiment was conducted to obtain the some basic information about the effects of ozonation on the indoor air quality in swine production facilities. A ozonation system was constructed and operated at average levels of 0.03ppm to improving the air quality in the nursery pig buildings. The results are summarized as follows; 1. The temperature in the nursery pig building were no differences between ozone treatment and control. 2. There were no differences between control and ozone treatment in relative humidity in the nursery pig building. 3. In the nursery pig building, ozone treatment has greatly reduced ammonia levels(up to 40%). 4. The hydrogen sulfide levels in the nursery pig building were no differences between ozone treatment and control. 5. In the nursery pig building, ozone treatment has slightly reduced carbon dioxide levels. The results of this experiment clearly demonstrate that ozonation is effective for the elimination of the malodors associated with indoor air quality in swine production facilities.