The Effects of Various Factors on Milk Yield and Variation in Milk Yield Between Milking, Milk Components, Milking Duration, and Milking Flow Rate in Holstein Dairy Cattle

착유우의 연속유량, 유량변이, 유성분, 체세포수, 비유지속시간, 비유속도에 대한 산차, 착유시간, 유기 및 착유간격의 효과

  • Ahn, B.S. (National Livestock Research Institute, R.D.A.) ;
  • Jeon, B.S. (National Livestock Research Institute, R.D.A.) ;
  • Baek, K.S. (National Livestock Research Institute, R.D.A.) ;
  • Park, S.J. (National Livestock Research Institute, R.D.A.) ;
  • Lee, H.J. (National Livestock Research Institute, R.D.A.) ;
  • Lee, W.S. (National Livestock Research Institute, R.D.A.) ;
  • Kim, S.B. (National Livestock Research Institute, R.D.A.) ;
  • Park, S.B. (National Livestock Research Institute, R.D.A.) ;
  • Kim, H.S. (National Livestock Research Institute, R.D.A.) ;
  • Ju, J.C. (Cheonan Yonam College) ;
  • Khan, M. A. (National Livestock Research Institute, R.D.A.)
  • Published : 2005.12.31


This study was carried out to estimate the effects of parity, milking time, milking interval and days in milk(DIM) on variation in milk yield between consecutive milkings(am to pm to am), morning and evening milk yield and its components, somatic cell counts(SCS), milking duration, milk flow rate and peak milk flow in Holstein dairy cattle. Records from one hundred and twenty two heads of Holstein cattle at National Livestock Research Institute, Korea were used for this study from July 1 to August 8, 2005. The experimental herd had average 1.6$\pm$0.9 parities, 199.8$\pm$109.1 DIM and 12.26$\pm$4.06kg milk yields at each milking. Milking yield, percent milk fat and SNF, milking duration and average milk flow were significantly varied by parity, milking time and DIM. Percent milk protein and lactose were varied by parity and DIM, however SCS and average milk flow were affected by parity and milking time. Milking interval significantly affected the consecutive, morning and evening milk yield and average milk flow. However, MUN was not affected by parity, milking time, DIM and milking interval. Milk yield was decreased with increasing parity. Milk yield in the morning was higher than that of in the evening. Milk yield between consecutive milking was not affected by parity, however, affected by milking time. Percent milk Fat, SNF and SCS were higher at in evening milk than those of in morning milk. Milk protein, lactose, SNF, SCS, milking duration and peak milk flow rate were influenced by parity. This study suggested that milk yield variation between consecutive milking, milking flow rate, and milking duration could be important traits for enhancing Holstein cattle productivity however, and more study is needed to estimate genetic parameters for such traits.


Consecutive milk yield;Milking duration;Milking time


  1. Boettcher, P. J., Dekkers, J. C. M. and Kolstad, B. W. 1998. Development of an Udder Health Index for Sire Selection Based on Somatic Cell Score, Udder Conformation, and Milking Speed. J. Dairy Sci. 81:1157-1168
  2. Ali, A K. and Shook, G. E. 1980. An optimum transformation for somatic cell concentration in milk. J. Dairy Sci. 63:487-490
  3. De la Fuente, L. F., San Primitivo, F., Fuertes, J. A. and Gonzalo, C. 1997. Daily and between milking variations and repeatabilities in milk yield, somatic cell count, fat, and protein of dairy ewes. Small Ruminant Research 24:133-139
  4. Rajala Schultz, P. J. and Saville, W. J. A 2003. Sources of Variation in Milk Urea Nitrogen in Ohio Dairy Herds. J. Dairy Sci. 86:1653-1661
  5. SAS User's Guide: Statistics, Version 8.1 Edition. 1999. SAS Inst., Inc., Cary, NC
  6. Schmidt G. H., Van Vleck, L. D. and Hutjens, M. F. 1988. Principles of dairy science. 2nd ed. pp 78
  7. Stewart, S., Godden, S., Rapnicki, P., Reid, D., Johnson, A and Eicker, S. 2002. Effects of Automatic Cluster Remover Settings on Average Milking Duration, Milk Flow, and Milk Yield. J. Dairy Sci. 85:818-823
  8. Syrstad, O. 1977. Day-to-day variation in milk yield, fat content and protein content. Livestock Production Science, 4:141-151
  9. Zwald, N. R., Weigel, K. A, Chang, Y. M., Welper, R. D. and Clayrn, J. S. 2005. Genetic evaluation of dairy sires for milking duration using electronically recorded milking times of their daughters. J. Dairy Sci. 88: 1192-1198
  10. 안병석, 최유림, 고문석, 김준식, 김경남, 김내수. 1996. 홀스타인 젖소의 관리형질에 미치는 환경 효과와 모수추정. 한축지 38(4):337-340
  11. 안병석, 권응기, 서국현, 이현준, 박병기. 2005. 젖소의 고능력우와 저능력우 간의 우유 성분 및 혈중 대사물질 특성 비교. 동물자원지 47(1):11-18
  12. 조용민, 안병석, 최유림. 2003. 검정일 1회 검정에 의한 착유우의 1일 유량 추정시 오차와 정확도. 동물자원지. 45(5):725-730
  13. 축산연구소, 2004년 하반기 젖소유전능력 평가보고서. p4

Cited by

  1. Estimation of genetic parameters for milk flow traits in Holstein dairy cattle vol.24, pp.3, 2013,