• Journal of the Korea Institute of Information and Communication Engineering
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• v.22 no.11
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• pp.1421-1427
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• 2018

Due to the rapid development of Internet-of-Things technology, different types of smart sensors are now devised and deployed widely. These smart sensors are now used in animal husbandry which was traditionally managed by the experience of farmers, such that wearable sensors for livestock, and the smart farm which is equipped with multiple sensors are utilized to increase the efficiency of livestock management. Herein, we consider a scheme in which the body temperature and the level of activity are measured by smart sensor which is attached to the neck of dairy cattle and the health condition is monitored based on collected data. Especially, we find that the estrous of dairy cattle which is one of most important metric in milk production, can be predicted with high precision using various machine learning techniques. By utilizing the proposed prediction scheme, estrous of cattle can be detected immediately and this can improve the efficiency of cattle management.

• Journal of the Korea Organic Resources Recycling Association
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• v.26 no.2
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• pp.85-93
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• 2018

Semi-dry anaerobic digestion experiment using dairy cattle manure collected from dairy cattle house was conducted to analyze efficiency of biogas production. As a first experiment, Biochemical Methane Potential (BMP) test was carried out according to certain ratio of sample mixtures: dairy cattle manure, pig slurry, and mixture of dairy cattle manure and pig slurry. The amount of methane accumulated during BMP test period was high in the experimental groups containing dairy cattle manure. As a second experiment, semi-dry anaerobic digestion experiment was carried out using only the dairy cattle manure collected from floor of the dairy cattle house. Judging from the experimental results, the optimum hydraulic retention time (HRT) of semi-dry anaerobic digestion for dairy cattle manure containing 13% of TS was 25 days. The amount biogas generated from the semi-dry anaerobic digestor with the TS of 13% of the dairy cattle manure ranged from 1.36~1.50v/v-d and the average was 1.44v/v-d. The optimum HRT of the semi-dry anaerobic digestor for dairy cattle manure containing TS of 15% and the semi-dry anaerobic digestor for dairy cattle manure containing TS of 17% was the same as 30 days. The amount biogas generated from the semi-dry anaerobic digestor with the TS of 15% of the dairy cattle manure ranged from 1.42~1.52v/v-d and the average was 1.47v/v-d. The amount biogas generated from the semi-dry anaerobic digestor with the TS of 17% of the dairy cattle manure ranged from 1.50~1.61v/v-d and the average was 1.55v/v-d.

• Journal of Animal Science and Technology
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• v.55 no.1
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• pp.67-74
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• 2013

To know the emission amount of greenhouse gases from bedding materials of cowshed floor, the emission rates of methane ($CH_4$) and nitrous oxide ($N_2O$) gases from a simulated cowshed floor (SCF) with sawdust that manure loading rate into the bedding material could be accurately controlled were assessed in this study. The manure loading rates of Korean beef and Holstein dairy cattle into the SCF of $0.258m^2$ surface area with 10 to 15 cm height sawdust were $1.586kg/m^2/d$ and $3.588kg/m^2/d$, respectively, and those were calculated on the basis of "Standard model for sustainable livestock" and "Data for excretion amount of manure from livestock". All experiments were done in triplicates in three different seasons (May to July, Sep. to Nov., and Feb. to Apr.) using 12 SCFs. The effects of bedding material thickness on $CH_4$ and $N_2O$ emission from SCFs for both Korean beef cattle and Holstein dairy cattle were not statistically significant (p<0.05). Emission amount of $CH_4$ and $N_2O$ per square meter of SCF for Holstein dairy cattle was 7.5 and 1.2 times higher than that of Korean beef cattle, respectively. The yearly $CH_4$ amount per head was 17.7 times higher in Holstein dairy cattle, obtaining 130.4 g/head/year from SCF for Holstein dairy cattle and 7.4 g/head/year from SCF for Korean beef cattle, and $N_2O$ was also 3.8 times higher in Holstein dairy cattle (3,267 g/head/year in Korean beef cattle and 14,719 g/head/year in Holstein dairy cattle). However, the $N_2O$-N per loaded nitrogen into SCF was higher in Korean beef cattle, having 0.2148 and 0.1632 kg $N_2O$-N/kg N in Korean beef cattle and Holstein dairy cattle, respectively, and those values were 3.07 and 2.33 times higher than that of Intergovernmental Panel on Climate Change (IPCC) 2006 guideline (GL) (0.07 kg $N_2O$-N/kg N).

• 월간낙농육우
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• v.18 no.11 s.199
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• pp.77-79
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• 1998

지난 6월 제주도에서 소 부루세라 백신 RB51을 접종한 한우 500여두가 유산을 일으켰으며, 7월 이후 경기, 강원, 충남지역의 일부 낙농농가의 젖소가 유산 및 조산을 일으켜 IMF로 시름이 커진 축산농가, 특히 낙농가의 괴로움이 더해지고 있는 사실이 정말로 가슴아프다. 이 기고에서 나는 최근 발생되고 있는 ${\ulcorner}$젖소의 유$\cdot$조산 원인 및 부루세라 백신(RB51)의 안전성 평가를 위한

• 월간낙농육우
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• v.27 no.6 s.302
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• pp.138-142
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• 2007

MPT 관리는 젖소, 육우의 혈액 성상을 판독해 영양대사 장애의 원인을 발견하고 그 대책을 종합적으로 조언해주는 서비스이다. 이를 잘 활용하면 젖소의 경제수명을 최대한 늘려주고 영양장애로부터 유발되는 각종 질병치료비도 절감시켜주는 등 경제효과가 크다. 다만, 소기의 효과를 거두기 위해서는 낙농비육농가와 MPT전문가와의 유기적인 협조가 중요하다.

• Feed Journal
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• v.2 no.7
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• pp.96-99
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• 2004

고온 스트레스를 받고 있는 상황에서 사료 배합비를 조절하거나 급여 방식을 조절하는 것은 젖소에게 고온 스트레스를 극복하는데 도움을 줄 수 있다. 사료배합의 조절은 기온이 올라가기 전에 미리 천천히 조절하여 젖소의 사료섭취량이 줄어드는 것을 막도록 해야한다.<중략>

• 월간낙농육우
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• v.35 no.12
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• pp.137-146
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• 2015

젖소의 번식문제는 많은 요인들이 관련된다. 환경적인 요인, 섭취 영양분과 관련된 문제, 사양관리 등이 번식 생리에 미치는 영향은 체내에서 복잡한 기전을 가지고 있다. 이 글에서는 깊이 있는 생리적 기전보다 섭취하는 영양분과 번식 효율과 관련하여 살펴보기로 하겠다. 특히 분만 후 비유 초기에 발생하는 문제들을 중심으로 번식에 미치는 영향과 그 해결방법에 관한 것이다.

• Proceedings of the Korean Society of Embryo Transfer Conference
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• 2006.10a
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• pp.119-119
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• 2006

• Proceedings of the Korean Society of Embryo Transfer Conference
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• 2004.10a
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• pp.70-71
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• 2004

• Proceedings of the Korean Society of Grassland Science Conference
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• 1999.06a
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• pp.9-39
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• 1999

우리나라에서 옥수수 사일리지는 젖소 사육농가에서 재배하고 있는 사료작물 중 가장 중요하다. 사일리지용 옥수수를 재배하지 않고는 젖소사육이 어렵다고 생각하는 낙농인이 많다. 과거에는 겨울철에만 옥수수 사일리지를 제조하여 급여하였으나, 최근에는 일부의 낙농가들은 연중 사일리지를 급여하는 연중급여체계로 전환하는 농가도 있다. 그런 면에서 옥수수 사일리지는 과거 어느 때보다 그 중요성이 강조된다.(중략)