Comparative study of fitting various lactation curve models in Holdeo crossbred cattle

DOI: 10.18805/ijar.B-3590    | Article Id: B-3590 | Page : 1538-1542
Citation :- Comparative study of fitting various lactation curve models in Holdeo crossbred cattle.Indian Journal Of Animal Research.2019.(53):1538-1542
B.N. Thorat, B.M. Thombre and U.Y. Bhoite badam.thorat2010@gmail.com
Address : Department of Animal Husbandry and Dairy Science, MGM Nanasaheb Kadam college of Agriculture, Gandheli, Aurangabad-431 007, Maharashtra, India.
Submitted Date : 3-03-2018
Accepted Date : 26-06-2019

Abstract

The present investigation was carried out on 838 weekly test day milk yield records of first lactation pertaining to 411 HF x Deoni (Holdeo) crossbred cows spread over 38 years located at Cattle Cross Breeding Project, Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani (Maharashtra). The comparison of four lactation curve models viz, Parabolic exponential function, Wood’s gamma function, Quadratic model and Mixed log function was made in the present investigation. Mixed log function described as an excellent model for prediction of WTDY with the highest coefficient of determination (99.01 %) with comparatively lowest root-mean-square error (0.16 kg) value. The quadratic model was least fit model with the lowest coefficient of determination (90.76 %) and the highest root-mean-square error (0.51 kg) among the four models in Holdeo. The predicted error in WTDY in Parabolic exponential function, Wood’s gamma function and mixed log function were the highest in WTDY5 and in Quadratic model it was highest in WTDY6. The errors between the observed values and predicted values were highest during the peak phase in all four models. The errors in estimated and predicted WTDMY values in initial milk yield of Holdeo cows were lower than the peak yield. The ascending phase of lactation curve was shorter than the descending phase. The gamma type function when compared to mixed log function, explained low peak yield and it is recommended that this function can give the best fit for the low yielding cows.

Keywords

Holdeo cows Lactation curve Weekly test days milk yield

References

  1. Cilek, S. and Keskin, I. (2008). Comparison of six different mathematical models to the lactation curve of Simmental Cows reared in Kazova State Farm. J. Vet. Anim. Adv. 7 (10): 1316-1319.
  2. Dave, B. K. (1971). First lactation curves of Indian Water Buffalo. Jnkvv Res. J. 5 (1): 93-95.
  3. Dongre, V. B. (2012). Modeling of lactation curve for sire evaluation in Sahiwal Cattle. Ph. D. Thesis Submitted to NDRI, Karnal.
  4. Dongre, V., Gandhi, R. S. and Singh, A. (2012). Comparison of different lactation curve models in sahiwal cows. Turk. J. Vet. Anim. Sci. 36 (6): 723-726.
  5. Gahlot, G. C., Gahlot, R. S. and Jairath, L. K. (1988). Pattern of Lactation curve in Rathi cattle. Indian J. Anim. Sci. 58 (9): 1112-1115.
  6. Guo, Z. and Swallve, H. H. (1995). Modelling of the lactation curve as A Sub-Model in the evaluation of test day Records. Proc. Interbull Mtg. Prague, Uppsala, Interbull Bull. No.11.
  7. Olori, V. E., Brotherstone, S., Hill, W. G., and Mcguirk, G. K. (1999). Fit of Standard Models of the lactation curve to weekly records of milk production of cows in a single herd. Livest. Prod. Sci. 34 (1): 23-27.
  8. Patond M. N., (2013). Modelling of lactation curve in gir triple cross cows. Ph. D. Thesis Submitted to MPKV, Rahuri, (MS).
  9. Rashia B. N. (2010). Genetic evaluation of the lactation curve in Karan Fries Cattle. Ph. D. Thesis Submitted to NDRI, Karnal.
  10. Sikka, L. C. (1950). A Study of lactation as affected by lactation and environment. J. Dairy Res. 17 (2): 231-234.
  11. Singh, B. and Bhat, P. N. (1978). Models of lactation curves for Hariana cattle. Indian J. Anim. Sci. 48 (4): 791-793.
  12. Tambe, D. R. (2016). Modelling of lactation curve in HF x Gir halfbred. Ph. D. Thesis, Submitted to MPKV, Rahuri, (MS).
  13. Wood, P. D. P. (1967). Algebraic Model of Lactation Curve in Cattle. Nature. 216: 164-165.

Global Footprints