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Somatic cell score as predictor of daily milk yield in Holsteins
Other Title(s)
معدلات الخلايا الجسدية كعامل تنبؤ لمعدل إنتاج الحليب اليومي في أبقار الهولستين
Joint Authors
Shook, G. E.
Haylman, E. D.
Khan, M. S.
Source
Journal for Scientific Resarch
Issue
Vol. 2, Issue 3 (30 Nov. 1998), pp.41-47, 7 p.
Publisher
Sultan Qaboos University College of Agricultural and Marine Sciences
Publication Date
1998-11-30
Country of Publication
Oman
No. of Pages
7
Main Subjects
Abstract EN
The purpose of our study was to determine if variation in milk yield at later stages of lactation can be explained by expressions of early lactation somatic cell score (SCS) and if the prediction of future yield within lactation can be improved by including SCS among the predictors.
Three data sets (n >600,000 each) were: milk yield with sample days near 20, 50 and 140.
Stepwise regression was used requiring F statistic (P < .01) for any SCS variable to stay in the model.
Separate analyses were run for 12 combinations of four seasons and first three parities for each data set.
Selection of SCS variables was not consistent across seasons or parities.
Coefficients of determination (R2) ranged from 54 to 74% with higher values for higher days in milk (DIM) and earlier lactations.
The inclusion of SCS expressions in the prediction equations improved R2by SCS was associated with milk yield on sample day, but the association was not strong enough to improve the prediction of future yield when other expressions of milk yield were taken into account.
American Psychological Association (APA)
Khan, M. S.& Shook, G. E.& Haylman, E. D.. 1998. Somatic cell score as predictor of daily milk yield in Holsteins. Journal for Scientific Resarch،Vol. 2, no. 3, pp.41-47.
https://search.emarefa.net/detail/BIM-629933
Modern Language Association (MLA)
Khan, M. S.…[et al.]. Somatic cell score as predictor of daily milk yield in Holsteins. Journal for Scientific Resarch Vol. 2, no. 3 (1998), pp.41-47.
https://search.emarefa.net/detail/BIM-629933
American Medical Association (AMA)
Khan, M. S.& Shook, G. E.& Haylman, E. D.. Somatic cell score as predictor of daily milk yield in Holsteins. Journal for Scientific Resarch. 1998. Vol. 2, no. 3, pp.41-47.
https://search.emarefa.net/detail/BIM-629933
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 46-47
Record ID
BIM-629933