The Effect of Cow Reproductive Traits on Lifetime Productivity and Longevity
The age of first calving (AFC) is one of the most important factors that have a significant impact on cow productivity in different lactations and its whole life. A belated AFC leads to reduced reproductive performance and it is one of the main reasons for reduced longevity. Cows that calved in time period from 2001-2007 and in this time finished at least four lactations were included in the database. Data were obtained from 68841 crossbred Holstein Black and White (HM), crossbred Latvian Brown (LB), and Latvian Brown genetic resources (LBGR) cows. Cows were distributed in four groups depending on age at first calving. The longest lifespan was conducted for LBGR cows, but they were also characterized with lowest lifetime milk yield and life day milk yield. HM breed cows had the shortest lifespan, but in the lifespan of 2862.2 days was obtained in average 37916.4 kg milk accordingly 13.2 kg milk in one life day. HM breed cows were also characterized with longer calving intervals (CI) in first four lactations, but LBGR cows had the shortest CI in the study group. Age at first calving significantly affected the length of CI in different lactations (p<0.05). HM cows that first time calved >30 months old in the fourth lactation had the longest CI in all study groups (421.4 days). The LBGR cows were characterized with the shortest CI, but there was slight increase in second and third lactation. Age at first calving had a significant impact on cows’ age in each calving time. In the analysis, cow group was conducted that cows with age at first calving <24 months or in average 580.5 days at the time of fifth calving were 2156.7 days (5.9 years) old, but cows with age at first calving >30 months (932.6 days) at the time of fifth calving were 2560.9 days (7.3 years) old.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1129031Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 943
 C.Y. Lin, A.J. McAllister, T.R. Batra, A.J. Lee, G.L. Roy, J.A. Vesely, J.M.., Wauthy, K.A. Winter, “Effects of early and late breeding of heifers on multiple lactation performance of dairy cows,” Journal of Dairy Science, vol. 71, pp. 2735-2743. 1988.
 J. Hultgren, C. Svensson, “Heifer rearing con-ditions affect length of productive life in Swedish dairy cows,” Preventative Veterinary Medicine, vol. 89, pp. 255-264. 2009.
 R.D. Evans, M. Wallace, D.J. Garrick, P. Dillon, D.P. Berry, V. Olori, “Effects of calving age, breed fraction and month of calving on calving interval and survival across parities in Irish spring-calving dairy cows,” Livestock Science, vol. 100, pp. 216-230. 2006.
 J. S. Cooke, Z. Cheng, N. E. Bourne, D. C. Wathes, “Association between growth rates, age at first calving and subsequent fertility, milk production and survival in Holstein-Friesian heifers,” Open J. of Animal Sc., vol.3, no.1, pp. 1 – 12, 2013.
 Z. Riecka, J. Candrák, “Analysis of relationship between production and reproduction traits of Holstein cattle population in the Slovak Republic,” Animal Science and Biotechnologies, vol 44, no 1, pp. 332 – 336, 2011.
 Consultative Committee of Farm Animal Genetic Resources, State of the Animal Genetic Resources of Latvia, Ministry of Agriculture of Latvia, Rīga, pp.49. 2003.
 J.F. Ettema, J.E.P. Santos, “Impact of age at calving on lactation, reproduction, health, and income in first-parity Holsteins on commercial farms,” Journal of Dairy Science, vol. 87, pp. 2730-2742. 2004.
 M.A. Nilforooshan, M.A. Edriss, “Effect of age at first calving on some productivity and longevity traits in Iranian Holsteins of the Isfahan province,” Journal of Dairy Science, vol. 87, pp. 2130-2135. 2004.
 G. Pirlo, F. Miglior, M. Speroni, “Effect of age at first calving on production traits and on difference be-tween milk returns and rearing costs in Italian Holsteins,” Journal of Dairy Science, vol. 83, pp. 606-608. 2000.
 J.S. Brickell, N. Bourne, M.M. McGowan, D.C. Wathes, “Effect of growth and development during the rearing period on the subsequent fertility of nulliparous Holstein-Friesian heifers,” Theriogenology, vol. 72, pp. 408-416. 2009.
 L. Cielava, D. Jonkus “First Calving Age Effect on the Longevity of Cows and Milk Productivity,” Ražas svētki Vecaucē – 2013, nov. 2013.
 Y. Grohn P.J. Rajala-Schultz, “Epidemiology of reproductive performance in dairy cows” Animal Reproduction Science. vol. 60–61. pp. 605–614. 2000.
 P.R. Tozer, A.J. Heinrichs,) “What affects the costs of raising replacement dairy heifers: A multiple- component analysis,” Journal of Dairy Science, vol. 84, pp. 1836- 1844. 2001.
 M.C.M. Mourits, D.T. Galligan, A.A. Dijkhuizen, R.B.M. Huirne, R.B.M. “Optimization of dairy heifer man-agement decisions based on production conditions of Pennsylvania,” Journal of Dairy Science, vol. 83, pp. 1989-1997. 2000.
 M. Janžekovič, M. Ocepek, T. Virk, D. Škorjanc, “Comparison of longevity and production traits of Holstein and Simmental cows of different origin in Slovenia,” Mljekarstvo, vol. 59. no. 4. pp. 336 – 342. 2009.
 A. Chegini, A.A. Shadparvar N. Ghavi Hossein‐Zadeh, “Genetic trends for milk yield, persistency of milk yield, somatic cell count and calving interval in Holstein dairy cows of Iran,” Iranian J. of App. Animal Sc. vol. 3, pp. 503 – 508. 2013.
 L. Šernienė, A. Kabašinskienė, “Analysis of reproductive performance, milk composition and quality of indigenous cows: Lithuanian Light Gray and White Backed,” Vet Med Zoot, vol. 72, no. 94, pp. 30 – 36. 2015.
 A.P. Gulinski B. Giersz G. Niedziałek K Młynek, “First age calving and its importance for milk productivity of primiparous cows remaining in eastern Mazovia farms from years 1977-2000,” Acta Scientiarum Polonorum Zootechnica. vol. 2. pp. 31–41. 2003.
 A. Chegini, A.A. Shadparvar, N. Ghavi Hossein‐Zadeh, “Genetic parameter estimates for lactation curve parameters, milk yield, age at first calving, calving interval and somatic cell count in Holstein cows” Iranian J. of App. Animal Sc. vol. 5. no. 1. pp. 61 – 67. 2014.
 D.P. Berry A.R. Cromie, “Associations between age at first calving and subsequent performance in Irish spring calving Holstein-Friesian dairy cows,” Livest. Sci. vol. 123, pp. 44-54. 2009.
 J. Miciński, M. Maršálek, J. Pogorzelska, A. Vrbová, W. Sobotka, G. Zwierzchowski, P. Matusevičius, “The comperative analysis of milk performance in Czech Pied cattle rised in the Czech Republic versus Polish Holstein – Friesian, Simental and Czech Pied cattle rised in Polland,” Vet Med Zoot. vol. 67. no. 89. pp. 75 – 80. 2014.