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Detection of Different Shapes of Lactation Curve Described by Ali and Schaeffer Model in Holstein Dairy Cows
Abstract
The aim of this study was to investigate different lactation curves and to detect the relationship between shape
of lactation curves and estimated model parameters from daily milk yield records of Holstein cows bred in Sanliurfa by
using five-parameter Ali-Schaeffer model which is known as best way for describing lactation curves. In this study, 188,316
daily milk yield records of 633 lactations obtained from 211 Holstein cows were used. According to sign of Ali-Schaeffer
model parameters, 12 different types of lactation curve were described for 632 lactations. However, only one lactation
could not be described. Among 632 lactations, signs of 19 curves for parameter a (peak yield), b and c (yield decline), d and
g (yield rise) were found as +, -, - ,-, + respectively and were described as typically lactation curve. Considering the results
from this study, parameter values from calculated model parameters should be useable for selection criteria, if
environmental factors are taken into account.
Keywords
Details
Primary Language
English
Subjects
-
Journal Section
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Publication Date
June 1, 2013
Submission Date
June 1, 2013
Acceptance Date
-
Published in Issue
Year 2013 Volume: 2 Number: 2
APA
Yazgan, K., Koncagül, S., & Cedden, F. (2013). Detection of Different Shapes of Lactation Curve Described by Ali and Schaeffer Model in Holstein Dairy Cows. Harran University Journal of the Faculty of Veterinary Medicine, 2(2), 94-101. https://izlik.org/JA82SA77GF
AMA
1.Yazgan K, Koncagül S, Cedden F. Detection of Different Shapes of Lactation Curve Described by Ali and Schaeffer Model in Holstein Dairy Cows. Harran Univ Vet Fak Derg. 2013;2(2):94-101. https://izlik.org/JA82SA77GF
Chicago
Yazgan, Kemal, Seyrani Koncagül, and Fatin Cedden. 2013. “Detection of Different Shapes of Lactation Curve Described by Ali and Schaeffer Model in Holstein Dairy Cows”. Harran University Journal of the Faculty of Veterinary Medicine 2 (2): 94-101. https://izlik.org/JA82SA77GF.
EndNote
Yazgan K, Koncagül S, Cedden F (June 1, 2013) Detection of Different Shapes of Lactation Curve Described by Ali and Schaeffer Model in Holstein Dairy Cows. Harran University Journal of the Faculty of Veterinary Medicine 2 2 94–101.
IEEE
[1]K. Yazgan, S. Koncagül, and F. Cedden, “Detection of Different Shapes of Lactation Curve Described by Ali and Schaeffer Model in Holstein Dairy Cows”, Harran Univ Vet Fak Derg, vol. 2, no. 2, pp. 94–101, June 2013, [Online]. Available: https://izlik.org/JA82SA77GF
ISNAD
Yazgan, Kemal - Koncagül, Seyrani - Cedden, Fatin. “Detection of Different Shapes of Lactation Curve Described by Ali and Schaeffer Model in Holstein Dairy Cows”. Harran University Journal of the Faculty of Veterinary Medicine 2/2 (June 1, 2013): 94-101. https://izlik.org/JA82SA77GF.
JAMA
1.Yazgan K, Koncagül S, Cedden F. Detection of Different Shapes of Lactation Curve Described by Ali and Schaeffer Model in Holstein Dairy Cows. Harran Univ Vet Fak Derg. 2013;2:94–101.
MLA
Yazgan, Kemal, et al. “Detection of Different Shapes of Lactation Curve Described by Ali and Schaeffer Model in Holstein Dairy Cows”. Harran University Journal of the Faculty of Veterinary Medicine, vol. 2, no. 2, June 2013, pp. 94-101, https://izlik.org/JA82SA77GF.
Vancouver
1.Kemal Yazgan, Seyrani Koncagül, Fatin Cedden. Detection of Different Shapes of Lactation Curve Described by Ali and Schaeffer Model in Holstein Dairy Cows. Harran Univ Vet Fak Derg [Internet]. 2013 Jun. 1;2(2):94-101. Available from: https://izlik.org/JA82SA77GF
