Received 20.01.2022
Revised 21.03.2022
Accepted 26.04.2022
Retrieved from Volume 26, No. 2, 2022
Pages 43 -52
Abstract
The main characteristics of the milk productivity of Holstein dairy cattle differ in different countries due to differences in terrain, management and breeding objectives. At the same time, the manifestation of non-genetic (that is, environmental) factors during milk production, as a rule, mask the real breeding value of animals. The main goal of this study was to analyze the influence of lactation number, year and season of calving on the milk productivity of 238 Holstein cows during a 4-year period (2014-2017). The study was conducted using primary data on the dairy productivity of livestock in the conditions of PJSC Plemzavod Stepnoi of the Kamian-Dnipro district of the Zaporizhia region.The following characteristics were evaluated for each animal: duration of lactation, hope for 305 days of lactation, hope for the entire lactation, fat content and protein content in milk. P. Wood's model was used to approximate lactation curves within each subgroup. All signs of milk productivity were analyzed based on the algorithm of one- or two-factor analysis of variance with fixed factors using the statistical package STATISTICA v. 6.0 (Statsoft Inc.).Lactation number was found to have a significant effect on all milk yield traits that were examined (in all cases: p<0.001). Hope for 305 days of lactation increased with the growth of lactation number. The highest values of this characteristic were noted during the 2nd and 3rd lactations. The lowest estimate of milk yield for 305 days of lactation of dairy cows of this farm was obtained in 2014, and the highest in 2016. The calving season probably influenced the indicators of milk productivity (primarily, the content of fat and protein in milk) of firstborns. In addition, the milk yield score at 305 days of lactation was lower among winter- or spring-calved gilts compared to fall-calved animals. No influence of the calving season was noted among adult cows. Lactation number and year of calving probably influenced the estimates of the coefficients and parameters of P. Wood's model. The shape of the lactation curves of firstborns was flatter compared to mature cows. Estimates of peak milk yield were lower, but the index of constancy of the lactation curve was higher during the 1st lactation. Thus, we found that obtaining real (unbiased) estimates of milk productivity traits of Holstein cattle requires preliminary adjustment of data regarding the influence of lactation number, year and season of calving
Keywords:
milk productivity; number of lactations; year and season of calving; P. Wood model; dairy cattle[1] M’hamdi,N., Bouallegue, M., Frouja, S., Ressaissi,Y., Brar, S.K., & Hamouda, M.B. (2012). Effects of environmental factors on milk yield, lactation length and dry period in Tunisian Holstein cows. In Milk production – An upto-date overview of animal nutrition, management and health. doi: 10.5772/50803.
[2] Bakri, N.E., Pieramati, C., Sarti, F.M., Giovanini, S., & Djemali, M.N. (2022). Estimates of genetic parameters and genetic trend for Wood’s lactation curve traits of Tunisian Holstein–Friesian cows. Tropical Animal Health and Production, 54(4), 1-9. doi: 10.1007/s11250-022-03219-2.
[3] Wood, P.D.P. (1967). Algebraic model of the lactation curve in cattle. Nature, 216(5111), 164-165. doi: 10.1038/216164a0.
[4] Zhou, F., Liang, Y., Arbab, A.A.I., Li, M., Yang, Z., Karrow, N. A., & Mao, Y. (2022). Analysis of non-genetic factors affecting wood’s model of daily milk fat percentage of Holstein Cattle. Veterinary Sciences, 9(4), article number 188. doi: 10.3390/vetsci9040188.
[5] Torshizi, M.E., Mashhadi, M.H., & Farhangfar, H. (2019). Different aspects of lactation persistency in dairy cows. Indian Journal of Animal Sciences, 89(6), 607-614. Retrieved from https://www.researchgate.net/publication/334120424_Different_aspects_of_lactation_persistency_in_dairy_cows.
[6] Atashi, H., Asaadi, A., & Hostens, M. (2021). Association between age at first calving and lactation performance, lactation curve, calving interval, calf birth weight, and dystocia in Holstein dairy cows. PLoS One, 16(1). doi: 10.1371/journal.pone.0244825.
[7] Rekaya,R.,Weigel,K.A., & Gianola,D.(2001).Hierarchical nonlinear model for persistency of milk yield in the first three lactations of Holsteins. Livestock Production Science, 68(2-3), 181-187.doi: 10.1016/S0301-6226(00)00239-6.
[8] Collins-Lusweti, E. (1991). Lactation curves of Holstein-Friesian and Jersey cows in Zimbabwe. South African Journal of Animal Science, 21(1), 11-15. Retrieved from https://www.ajol.info/index.php/sajas/article/view/138658.
[9] Wood, P.D.P. (1968). Factors affecting persistency of lactation in cattle. Nature, 218(5144), 894-894. doi: 10.1038/218894a0.
[10] Abubakar, B.Y., & Buvanendran, V. (1981). Lactation curves of Friesian-Bunaji crosses in Nigeria. Livestock Production Science, 8(1), 11-19. doi: 10.1016/0301-6226(81)90027-0.
[11] Rekik, B., Gara, A.B., Hamouda, M.B., & Hammami, H. (2003). Fitting lactation curves of dairy cattle in different types of herds in Tunisia. Livestock Production Science, 83(2-3), 309-315. doi: 10.1016/S0301-6226(03)00028-9.
[12] Kramarenko, S.S., Lugovyi, S.I., Lykhach, A.V., & Kramarenko, O.S. (2019). Analysis of biometric data in breeding and selection of animals. Mykolaiv: MNAU. Retrieved from http://dspace.mnau.edu.ua/xmlui/handle/123456789/6208?show=full.
[13] Mellado, M., Antonio-Chirino, E., Meza-Herrera, C., Veliz, F.G., Arevalo, J.R., Mellado, J., & De Santiago, A. (2011). Effect of lactation number, year, and season of initiation of lactation on milk yield of cows hormonally induced into lactation and treated with recombinant bovine somatotropin. Journal of Dairy Science, 94(9), 4524-4530. doi: 10.3168/jds.2011-4152.
[14] Ray, D.E., Halbach, T.J., & Armstrong, D.V. (1992). Season and lactation number effects on milk production and reproduction of dairy cattle in Arizona. Journal of Dairy Science, 75(11), 2976-2983. doi: 10.3168/jds.S0022-0302(92)78061-8.
[15] Çilek, S. (2009). Milk yield traits of Holstein cows raised at Polatli state farm in Turkey. Journal of Animal and Veterinary Advances, 8(1), 6-10. Retrieved from https://www.researchgate.net/publication/298856604.
[16] Davis, S.R., & Hughson, G.A. (1988). Measurement of functional udder capacity in lactating Jersey cows. Australian Journal of Agricultural Research, 39(6), 1163-1168. doi: 10.1071/AR9881163.
[17] Duru, S. (2018). Determination of starting level of heat stress on daily milk yield in Holstein cows in Bursa city of Turkey. Ankara Üniversitesi Veteriner Fakültesi Dergisi, 65(2), 193-198. doi: 10.1501/Vetfak_0000002846.
[18] Çilek, S., & Tekin, M.E. (2005). Environmental factors affecting milk yield and fertility traits of Simmental cows raised at the Kazova State Farm and phenotypic correlations between these traits. Turkish Journal of Veterinary and Animal Sciences, 29(4), 987-993. Retrieved from https://www.researchgate.net/publication/289434859.
[19] Tekerli, M., Akinci, Z., Dogan, I., & Akcan, A. (2000). Factors affecting the shape of lactation curves of Holstein cows from the Balikesir province of Turkey. Journal of Dairy Science, 83(6), 1381-1386. doi: 10.3168/jds.S0022-0302(00)75006-5.