• Journal of Animal Environmental Science
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• v.13 no.1
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• pp.21-28
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• 2007

This experiment was conducted to determine the effect of feed intake and water consumption on milk yield and manure production in milking cows. The average feed intake(dry matter) of milking cows were 19.5kg/hd/d. Spring(23.9kg) and fall(22.1kg) feed intake rates when higher than in the summer(17.0kg) and winter(15.3kg/hd/d). The average water consumption of milking cows were $77.2\ell/hd/d$. Summer showed the highest value$(85.5\ell/hd/d)$ and winter showed the lowest value$(62.2\ell/hd/d)$. The average milk yield during spring, summer, fall, and winter was 30.8, 24.0, 25.4, and 23.7kg/hd/d, respectively. Milk yield during spring was found to be statiscally greater than for the other seasons. Manure production of milking cows during spring, summer, fall, and winter was 64.4, 63.5, 60.4, and 51.0kg/hd/d, respectively. Consequently, a relatively high correlation between milk yield and water consumption$(R^2=0.7742)$, milk yield and feed intake$(R^2=0.7459)$, water, consumption and urine production$(R^2=0.7422)$, feed intake and feces production$(R^2=0.6044)$, and milk yield and feces production$(R^2=0.6920)$ were observed in milking cows. The other hand, correlation between water consumption and feces production$(R^2=0.2950)$, feed intake and urine production $(R^2=0.1985)$, and milk yield and urine production$(R^2=0.2335)$ were found to be relatively low. Therefore, correlation equation between milk yield and feed intake, milk yield and water consumption can be estimated from : $Y=0.1919X_1+11.181(R^2=0.7742),\;Y=0.8568X_2+9.3067(R^2=0.7459)$(Y=milk yield $X_1=water$ consumption, $X_2=feed$ intake).

• Journal of The Korean Society of Grassland and Forage Science
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• v.14 no.2
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• pp.110-119
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• 1994

Measurements of hehage intake and milk yield were made on high yielding dairy cows, which were strip-grazed on Loliurn perenne sward at three levels of herbage allowance in three experimental periods. The contents of nitrogen, chrome and ash in the faeces slightly decreased with the progress of growth period of experimental sward, and the decrease of herbage allowance. There were small difference in herbage digestibility among periods or the levels of herbage allowance with falling from 82.7% to 79.1% from period 1 to period 3 and from 81.6% to79.9% from high to low level of herbage allowance. Daily herbage intake was 15.8 and 15.9 kg OMIcow at the high and medium levels of hecbage aljowance, but reduced significantly to 14.6 kg OM/cow at the low level. Herbage intakes in three periods were shown a slight decrease. Daily milk yield in terms of 4% FCM significantly decreased from 23.6 to 20.6 kg/cow from period 1 to period 3. Milk yield at the high and medium levels of herbage allowance were 23.5 and 22.2 kg/cow at the low level of herbage allowance. The highly significant (P<0.01) correlations between the level of herbage allowance and herbage intake (r=0.88), or milk yield (r=0.81) were obtained.

• Feed Journal
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• v.2 no.9
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• pp.104-107
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• 2004

하절기 사육환경 온도가 상승함에 따라 젖소가 받는 스트레스로 인한 생산성 저하는 저능력우 보다 고능력우에서 증가하게 되는데, 이는 높은 산유량을 유지하는데 필요한 기초 에너지 소모가 증가하여 체온이 증가하기 때문이다. 또한 고능력우들은 높은 산유량을 유지하기 위하여 더 많은 에너지와 영양소를 섭취하여야만 하는데 고온스트레스로 인하여 사료 섭취량이 감소, 에너지 부족현상을 다른 젖소들보다 더 심각하게 겪으므로 대사성 질병 발생이나 번식능력의 저하가 현저히 나타나기 때문이다(외기의 적정온도 : 4~24℃). (중략)

• Journal of Animal Science and Technology
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• v.44 no.5
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• pp.561-572
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• 2002

The objective of this study was to evaluate a feed additives used mainly in lactating cow diets in transient pregrent cow diets. The study was conducted as a completely randomized design with forty Holstein pregnant cows to determine the effect of feeding Aspergillus oryzae(T2), Saccharomyces cerevisiae mixture(T3) and enzyme(cellulase, xylanase) - releasing chemicals(ERC) (T4) on the dry matter intake, milk yield, milk composition and metabolic disorders. Dry matter intake was similar among treatments for 3 weeks prepartum but cows fed enzyme tended to increased feed intake compared to no additives treatment both in calving day and for 3 weeks postpartum. Cows fed Aspergillus oryzae, Saccharomyces cerevisiae and ERC produced more milk than those fed no additives. However, there is no significant difference among treatments. Concentration of glucose was not significantly different among treatment prepartum but that in plasma of cows fed ERC was higher at calving and 3 weeks postpartum compared to others. Increase in NEFA began at 3 weeks prepartum and accelerate during the final 7 days before calving at all treatments but lower for ERC-treated cows at calving and 3 weeks postpartum. Ca concentration not different among treatment prepartum and postpartum. Corticoid content decreased significantly for cows fed ERC compared to those fed non-additives. Metabolic disorder was not occurred in cows fed ERC. However, ketosis and displased abomasum were happened 1 cow when fed non-additives, metritis 1 cow when fed Aspergillus oryzae and retained placenta 1 cow in all treatments except cows fed ERC.

• Journal of Animal Environmental Science
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• v.17 no.3
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• pp.189-196
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• 2011

The present study was conducted to investigate effects of auto milking system (AMS) on milk yield and milk composition in dairy cow using dairy herd improvement (DHI) record. DHI records for 147 cows were compared between a year before and after AMS use. AMS significantly increased daily milk yield compared with the conventional milking system (30.4kg vs 34.3 kg for CMS and AMS, respectively). There were no significant differences in the contents of milk fat (3.7% vs 3.8% for CMS and AMS) and milk protein (3.2% vs 3.2% for CMS and AMS) between CMS and AMS. But the yields of milk fat and milk protein were significantly higher for AMS than for CMS. Average somatic cell counts were 169,400/ml (1st grade) before AMS use but increased by 314,400/ml (2nd grade) after AMS use. Overall, AMS increased milk yield and the yields of milk fat and protein without affecting milk composition but also increased somatic cell count.

• 월간낙농육우
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• v.35 no.12
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• pp.121-124
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• 2015

좀 더 넓은 곳에서 젖소를 키우고 싶어 2년 전 김포 월곶면 고양리와 인접해있는 쇄암리로 자리를 옮긴 대성우목장(대표 이성우 56)은 현재 총 65두(착유우39 육성우21 건유우5, 쿼터 1,330kg/서울우유)의 젖소를 사육하고 있다. 이 목장은 지가(地價)가 높은 수도권에 위치한 탓에 생산비 자체를 낮추기 보다는 산차수를 높게 유지하고 두당 평균 산유량을 늘리는 방식으로 경쟁력을 높였다. 대성우목장 이성우 대표로부터 가장 효율적인 평균 산차는 몇 산인지, 그리고 두당 평균 산유량을 높이기 위해 어떻게 해야 하는지 그 비법을 들어봤다.

• Feed Journal
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• v.3 no.6 s.22
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• pp.60-67
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• 2005

가축이 더위에 노출이 되면 고온스트레스의 피해를 입게 되어 번식우는 발정이 잘 오지 않거나 수태율이 현저히 낮아지게 되고, 비육우의 경우는 증체율 및 육질이 떨어지게 되며, 젖소는 산유량 및 수태율 저하 등이 수반된다. 기상자료에 의하면 수원을 기준으로 할 때 가축의 생산성에 영향을 받기 시작하는 온도인 26$^{\circ}C$ 이상되는 일수가 90일로서 일년 중 무려 1/4이 고온스트레스를 받는다고 할 수 있다. 가축이 더위에 노출이 되면 고온 스트레스의 피해를 입게 되어 번식우는 발정이 잘 오지 않거나 수태율이 현저히 낮아지게 되고, 비육우의 경우는 증체율이 떨어지며, 젖소의 경우 산유량이 감소하게 된다.

• Journal of the korean veterinary medical association
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• v.33 no.7
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• pp.388-391
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• 1997

최근 우유소비가 증가하고 집유량은 감소하고 있다. 이에 따라 대다수 유통업체들은 장기보관용 유제품 생산량을 줄이고 있는 등 우유확보에 총력을 기울이고 있다. 이같은 현실에 근거 산유량의 증가를 가져올 수 있는 젖소 산유촉진 단백질의 국내 적용사례 및 개선방안을 알아보기로 한다.

• 월간낙농육우
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• v.18 no.12 s.200
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• pp.72-73
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• 1998

• 종축개량
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• v.9 no.2
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• pp.19-20
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• 1987