• KOREAN POULTRY JOURNAL
• /
• v.24 no.2 s.268
• /
• pp.131-135
• /
• 1992

겨울철 산란육성계와 브로일러에서 장염, 미숙변, 연변, 계사과습 등으로 증체, 폐사, 도태율이 증가하여 생산성이 저하되며 산란성계 편입 후에도 능력을 최대한 발휘하지 못하여 고심한다. 여름철에는 콕시듐증이 문제이지만 겨울철은 방한시설에 치중하다보면 장염성 살모넬라증을 일으켜 눈에 보이지 않게 손실을 보게 된다. 닭에서 상기원인체인 살모넬라증은 인수공통전염병(人獸共通傳染病)의 하나로 닭은 물론 사람에게도 오염된 닭고기, 계란을 먹고서 때때로 식중독 증상을 일으킨다. 아울러 닭에서도 과습고온 사육시 연변, 하리, 장염, 소화장해 등으로 생산성 저해 소화기 질병을 일으킨다. 이 달에는 본 질병의 근본원인체인 살모넬라 장염에 대하여 기술한다.

• KOREAN POULTRY JOURNAL
• /
• v.36 no.7 s.417
• /
• pp.66-67
• /
• 2004

6월 중순, 이미 외부온도가 $^{\circ}C$를 훌쩍 넘어서면서 더위가 일찍 찾아왔다. 충남 아산시 음봉면에서 4만수의 산란계(A형 4단 개방계사, 2동)를 경영하고 있는 송봉순(금강농장, 4) 사장과 직원들은 계란 이송벨트를 타고 집하장으로 들어오는 계란을 선별하느라 여념이 없다. AI 이후 난가가 높게 형성(특란 109원)되면서 다른때 보다도 손놀림이 가볍다. 28주령에 산란율 $90\%$를 보이면서 피크를 향하고 있는 닭들이 대견스러울 따름이지만 한 켠에는 지속적으로 오르고 있는 사료가격과 비수기철이 다가오면서 걱정이 앞서기도 한다.

• KOREAN POULTRY JOURNAL
• /
• v.41 no.1
• /
• pp.109-113
• /
• 2009

사료공장, 도계장, 가공공장 등 양계와 관련된 산업의 대부분이 HACCP를 도입하여 소비자의 요구에 맞는 양계산물을 공급하는 가운데 지난 2008년부터 양계장에도 HACCP가 도입되면서 많은 농장들이 HACCP인증을 받기 위한 노력에 박차를 가하고 있다. 본고는 지난 12월 3일 산란종계장으로서는 처음으로 HACCP인증을 받고 위생적인 종란생산을 통해 병아리를 공급하고 있는 아인농장(대표 이광식)을 찾았다.

• Korean Journal of Environmental Agriculture
• /
• v.27 no.4
• /
• pp.441-446
• /
• 2008

This study was conducted to determine the effect of heat stress on laying hen performance during summer. A total of 180 Hyline-brown layers, 98 days of age, were housed in a enclosed house. The daily maximum temperature in the house was ranged $26{\sim}36^{\circ}C$. The egg production was markedly fallen than other days when daily maximum temperature in the layer house became more than $33^{\circ}C$. As water intake and feed intake increased to $490\;mL\;bird^{-1}\;day^{-1}$ and $240\;g\;bird^{-1}\;day^{-1}$, the egg production soared. But it was hardly increased more than them. Based on these results, layer house roof should be amply insulated to improve the egg production of layers. If not insulated, the shade curtain should be installed above roof and cool water sprayed before and after 2 p.m. And layers should be provided cool drinking water of about $15^{\circ}C$ in the day time.

• Korean Journal of Poultry Science
• /
• v.18 no.3
• /
• pp.151-159
• /
• 1991

As a part of investigation on causes of drop in egg production in domestic chicken breeding farm, bacteriological contamination on air, feed, drinking water and artificial insemination instruments of randomly selected three farms was surveyed. Total bacterial population in the air was very high in all of the chicken houses tested and was not significantly different among these farms . However, total bacterial counts in the air of the problem house having egg drop problem and colibacillosis was higher than normal house within the problem farm. Bacterial population in the assorted feed was low before or after administration on the normal farm while it was much more increased after administration than before administration on the problem farm. Bacterial population of the drinking water in the source of water supply was very low and has no differences among farms tested. Also, bacterial population in the normal farm was not significantly different between source of water supply and after administration. However, population of total bacteria and coliform bacteria after administration was increased. Bacterial population was much higher in the artificial insemination instrument of problem farm than normal farm. However, this bacterial population in the problem farm was decreased to those of normal farm after these instruments were sanitized.

• KOREAN POULTRY JOURNAL
• /
• v.42 no.7
• /
• pp.114-117
• /
• 2010

양계업에 늦깎이로 뛰어들어 좋은 계란을 생산하기 위한 열정으로 누구 못지않은 노력을 보이고 있는 농장이 있어 찾아갔다. 강원도 춘천시 사북면에 위치한 양지농장(대표 김구봉)은 3천평 부지에 유창계사 7개동을 지어 2만수 규모의 평사에서 유정란을 생산하고 있다.

• KOREAN POULTRY JOURNAL
• /
• s.9
• /
• pp.58-61
• /
• 1970

[$\blacklozenge$]종래 우리 나라 산란용 초생추의 사육 경향을 보면 춘분을 전후한 3월에 편중해 있으며 6월부터 8월에 이르는 하절기에는 가급적 육추를 하지 않고 있었다. 이러한 관념의 근거는 더운 여름철에는 고온다습으로 인하여 사료의 섭취량이 적고 계사 바닥에 각종 세균이 번성하여 장(腸)내 질환이 다발하여 병아리가 튼튼하게 자라지 못하였다는 데 있다. 본지 기자는 천호부화장 상무 김영환씨를 찾아 대담으로 여름철 육추의 장단점을 알아보기로 하였다.

• Journal of Animal Environmental Science
• /
• v.7 no.1
• /
• pp.39-44
• /
• 2001

This research was carried out to determine the quantity and characteristics of layer excreta produced in different age and different types of layer house. Daily feed intakes in the growing stage were 60.8 and 92.9g/d the 6th and 12th week of age, respectively. Daily feed intakes in the early laying stage (19th wk of age) and the ending period of laying(55th wk of age) were 105.1 and 122.0 g/d, respectively. A laying hen consumed 193.1~222.5$m\ell$ of water per day. The amount of excreta produced by laying hen were 143.3~144.8g per day. The moisture contents of excreta produced by laying hen ranged over 74.7~80.5% in laying period. The average contents of N, $P_2O_5$ and $K_2O$ in layer excreta were 4.88, 1.92 and 1.71% in DM basis, respectively. In the laying period, CaO contents of excreta were 7.42~9.02%. The moisture contents of excreta produced by windowless poultry house, open-sided poultry house applied mechanical ventilation and open-sided poultry house applied natural ventilation were 65.4, 75.7 and 81.3% in summer, respectively.

• Korean Journal of Poultry Science
• /
• v.11 no.1
• /
• pp.49-64
• /
• 1984

During the 1978-79 Newcastle disease (ND) epizootic period, a detailed survey was conducted on the five representative farms which had been following one of the recommended vaccination programs. When the disease broke out during laying period, clinical symptoms were mild to moderate respiratory distress and greenish diarrhea. Affected flocks experienced weekly mortality from less than 1% to 17%. Egg production returned to normal 18 to 36 days after the initial signs appeared although some flocks never returned to normal. On postmortem examination,, most affected chickens showed severe hemorrhagic lesions in the duodenum, hematoma on ova, and heavy fat accmulation on various visceral organs. Most of the NO affected flocks had geometric mean hemagglutination inhibition antibody(HIA) titers of 7 log$_2$ or higher two to three weeks after the appearance of clinical signs. These HIA titers were at least 16-fold higher than those before infection. Flock mean HIA titers before infection were usually lower than 3 log$_2$. Severity of clinical signs and anamnestic antibody response were maximum in the flocks whose vaccination immunity was insufficient or waned considerably. Observations showed that even young birds, if properly vaccinated, could get effective protection from field ND exposure.

• Journal of Animal Environmental Science
• /
• v.14 no.1
• /
• pp.53-60
• /
• 2008

This study was carried out to measure and analyze the vibration levels and modes produced by a hopper type feeder used at laying hen farms, to prevent the vibration resonance and to reduce the vibration of the hopper type feeder (6-tier). The most vibration in a layer house were produced by hopper type feeder as shown the previous study. According to the measurement results, the ratio of transmissibility was as high as 100-638% for natural frequency of 170 Hz or less. And vibration simulations were taken by the results of vibration mode analysis and the weakest points to vibrations were determined accordingly. Then measurement and analysis were taken for those points. The quantities of vibration were 4.6354-4.9118 g($g=9.81^m/s^2$) by axis. In this study, it was found that hopper type feeder generated vibration as much as to influence the ratio of laying eggs of layer. And by the analysis of vibration on the weakest points, design methods and equipment were suggested for isolating/reducing of vibration by each axis.