Browse > Article
http://dx.doi.org/10.5713/ajas.2006.309

Study on Milkability Traits in Holstein Cows  

Lee, D.H. (Department of Animal Life & Resources, Hankyong National Univeristy)
Choudhary, V. (Department of Animal Life & Resources, Hankyong National Univeristy)
Publication Information
Asian-Australasian Journal of Animal Sciences / v.19, no.3, 2006 , pp. 309-314 More about this Journal
Abstract
The present investigation was undertaken to study the milkability characteristics of Holstein cows. Out of 6,660 initial records 4,607 records were finally included in the analysis after deleting some records with an abnormal range of values for the traits considered. These 4,607 Holstein cows belonged to a total of 122 herds located in a province in Korea. The 'LactoCorder' instrument was used to electronically record the milkability traits at the milking parlor. A total of 19 traits were studied which were broadly classified into milk yield, milking speed, milking time and the electrical conductivity related traits. The SAS 9.1 statistical software was used to carry out analyses. The average maximum milk flow per minute was 3.21 kg/min, while the average milking speed during the main milking process (DMHG) had a mean value of 2.30 kg/min. The total milk yield was 14.14 kg, 62% of which was milked during the first three minutes of the milking. The average total milking time was 8.23 min. Among the three phases of the main milking process, the time of stable milk flow had the longest time (2.97 min) followed by the time at the decline phase (2.62 min). The average time taken to reach the plateau phase was 1.08 min, which can still be reduced further through improved managemental practices. Among milk yield traits, milk yield during the first two (MG2) and three (MG3) minutes of milking had high positive correlation with milking speed traits and negative correlations with almost all the milking time traits except time of incline in milk flow from 0.5 kg/min till the attainment of the plateau phase (tAN). Milking speed traits had negative correlations with total milking time, time at main milking process, time at plateau and with the time at decline. Since there was medium to high negative correlation between the milking speed and the time at plateau, there is a need for selection of cows which have intermediate milking speed so that it could require less milking time and also the optimum (higher and longer) plateau time. Proper pre-stimulation and avoiding over milking will help in further reducing the milking time and thus will add to the net profit of the farmer.
Keywords
Milkability; Holstein Cow; Correlation; Milking Time; Milking Speed;
Citations & Related Records

Times Cited By Web Of Science : 3  (Related Records In Web of Science)
Times Cited By SCOPUS : 3
연도 인용수 순위
1 Bagnato, A., A. Rossoni, C. Maltecca, D. Vigo and S. Ghiroldi. 2003. Milkability traits recorded with flowmeters in Italian Brown Swiss. In 54th Annunal EAAP Meeting, Rome, 31 Aug. -3 Sept. 2003
2 Boettcher, P. J., J. C. M. Dekkers and B. W. Kolstad. 1998. Deveopment of an udder health index for sire selection based on somatic cell score, udder conformation, and milking speed. J. Dairy Sci. 81:1157-1168   DOI   ScienceOn
3 Maroney, M., P. Ruegg, F. Tayar and D. Reinemann. 2004. Use of Lactocorder$^{\circledR}$ to measure milking performance. Poster presented of the National Mastitis Council, 2004. http://www.uwex.edu/uwmril/pdf/MilkMachine/PerformanceTesting/04_NMCmeeting_Maroney_UseOfLactocorder.pdf (accessed on 27-04-2005)
4 Mein, G. A. and D. A. Reid. 1996. Milking-time test and guidelines for milking unit. pp 235 in Proc. 35th Ann. Mtg. Natl. Mastitis Counc., Nashville, T.N. Natl. Mastitis Coun., Inc., Madison, WI
5 Rothenanger, E., Bruckmaier and J. W. Blum. 1995. Association and dissociation of single quarter and total milk flow in dairy cows: Effects of milking with and without prestimulation. Milchwissenschaft, 50:63-67
6 Vavrišínová, K., P. Strapák, O. Debrecéni, D. Bíro and M. Halo. Evaluation of Milkability of Slovak Spotted Cattle. http://www.slpk.sk/eldo/actafz/abstracts3-01.htm, accessed on 27-04-2005
7 Wellnitz, O., R. M. Bruckmaier and J. W. Blum. 1999. Milk ejection and milk removal of single quarters in high yielding dairy cows. Milchwissenschaft, 54:303-306
8 Zwald, N. R., K. A. Weigel, Y. M. Chang, R. D. Welper and J. S. Clay. 2005. Genetic evaluation of dairy sires for milking duration using electronically recorded milking times of their daughters. J. Dairy Sci. 88(3):1192-1198   DOI   ScienceOn
9 Rasmussen, M. D. 2004. Overmilking and teat condition. NMC Annual Meeting Proceedings (2004). pp. 169-175
10 Norberg, E., H. Hogeveen, I. R. Korsgaard, N. C. Friggens, K. H. M. N. Sloth and P. Levendahl. 2004. Electrical conductivity of milk: Ability to predict mastitis status. J. Dairy Sci. 87:1099-1107   DOI   ScienceOn
11 Sivarajasingam, S., E. B. Burnside, J. W. Wilton, W. C. Pfeiffer and D. G. Grieve. 1984. The science behind milk ejection ranking dairy sires by linear programming dairy farm model. J. Dairy Sci. 67:3015-3024   DOI
12 Hiemstra, A., A. Groen, H. Bovenhuis, B. Ducro and G. de Jong. 2002. An ICAR recommendation sheet for udder health and estimation of genetic parameters for udder health. http://www.zod.wau.nl/abg/hs/education/av/mschiemstra.pdf (accessed on 27-04-2005)
13 Santus, E. and A. Bagnato. 1998. Genetic parameters estimation for milkability traits recorded with flowmeters in Italian Brown Swiss. In proceedings of the 6th WCGALP, vol. 25. Armidale, NSW, Australia, January 11-16, 1998. pp. 19-22
14 Seeman, A. 1997. Comparative study between quarter milking and conventional milking according milk production, milk flow, machine on time and teat treatment. Examensarbete 90. Dep. of Animal Nutr. and Managm. Sw. Univ. Agic. Sci.
15 Strapak, P., D. Biro, M. Halo, K. Vavrisinova, P. Juhas and O. Debreceni. Evaluation of Selected Traits of Sire Dams of Slovak Spotted Cattle. http://www.slpk.sk/eldo/actafz/abstracts3-01.htm, accessed on 27-04-2005
16 Svennersten, K. NMC Annual Meeting Proceedings (2004). pp. 215-225
17 Querengasser, J., T. Gelshauser, K. Querengasser, R. Bruckmaier and K. Fehling. 2002. Investigations on milk flwo and milk yield from teats with milk flow disorders. J. Dairy Sci. 85:810- 817   DOI   ScienceOn
18 Hiendleder, S., H. Thomsen, N. Reinsch, J. Bennewitz, B. Leyhe- Horn, C. Looft, N. Xu, I. Medjugorac, I. Russ, C. Kuhn, G. A. Brockmann, J. Blumel, B. Brenig, F. Reinhardt, R. Reents, G. Averdunk, M. Schwerin, M. Forster, E. Kalm and G. Erhardt. 2003. Mapping of QTL for body conformation and behavior in cattle. J. Hered. 94(6):496-506   DOI   ScienceOn
19 SAS. 2002. SAS/STAT Software. Version 9.1, SAS Institute, Cary, NC
20 Lactocorder: Lactation consulting with milk flow curves. http://www.lactocorder.ch/pdf/MEEN.zip (accessed on 27-04- 2005)