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Health and reproduction in organic and conventional swedish dairy cows

Fall, Nils (2009). Health and reproduction in organic and conventional swedish dairy cows. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2009:36
ISBN 978-91-86195-83-0
[Doctoral thesis]

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This thesis compares indicators of animal health and reproduction in organically and conventionally managed dairy cows in Sweden. The first part of the thesis is based on data from a twelve-year longitudinal study of a research farm with parallel but separate organic and conventional management. The second part of the thesis is based on data from a field investigation performed by the author. The field investigation included 20 organically and 20 conventionally managed dairy herds in south-east Sweden. Udder health and reproductive performance were studied in both the research farm and in the field study, general health and length of productive life in the research farm only and early-lactation metabolic profiles in the field study only. Udder health was assessed by comparing somatic cell counts during first 150 days in milk, number of test-milking occasions with >200,000 cells/ml during first 150 days in milk and number of veterinary treated cases of mastitis. Reproductive performance was assessed by comparing calving interval, calving-to-first insemination and pregnancy success at first insemination. Body condition score and blood metabolites indicating negative energy balance such as non-esterified fatty acids, beta-hydroxybutyrate, glucose and insulin were measured. Multivariable, multilevel statistical models were consistently employed. Management type, breed, housing, parity, and milk yield were frequently used predictor variables in the different statistical models. The predictor variable of main interest, organic or conventional management, was forced to stay in all models. The conclusion is that under Swedish conditions, cows in organic and conventional dairy management differ only marginally considering mastitis, reproductive performance and metabolic profiles, implying that animal health in organic management is equally good as in conventional management in these specific fields.

Authors/Creators:Fall, Nils
Title:Health and reproduction in organic and conventional swedish dairy cows
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2009
Number of Pages:57
ALLI. Fall, N., Emanuelson, U., Martinsson, K., Jonsson, S. (2008). Udder health at a Swedish research farm with both organic and conventional dairy cow management. Preventive Veterinary Medicine 83(2):186-195. II. Fall, N., Forslund, K., Emanuelson, U. (2008). Reproductive performance, general health, and longevity of dairy cows at a Swedish research farm with both organic and conventional management. Livestock Science 118(1-2):11-19. III. Fall, N., Gröhn, Y., Forslund, K., Essen-Gustavsson, B., Niskanen, R., and Emanuelson, U. (2008). An observational study on early lactation metabolic profiles in Swedish organically and conventionally managed dairy cows. Journal of Dairy Science 91:3983-3992. IV. Fall, N. and Emanuelson, U. (2009). Milk yield, udder health and reproductive performance in Swedish organic and conventional dairy herds. Journal of Dairy Research (in press).
Place of Publication:Uppsala
Publisher:Dept of Clinical Sciences, Swedish University of Agricultural Sciences
Associated Programs and Other Stakeholders:SLU - Research Areas for the Future > Future Animal Health and Welfare (until Jan 2017)
ISBN for printed version:978-91-86195-83-0
Publication Type:Doctoral thesis
Full Text Status:Public
Agrovoc terms:dairy cows, animal health, mammary glands, milk yield, animal performance, reproduction performance, metabolism, alternative agriculture, sweden
Keywords:organic, dairy cow, udder health, milk yield, length of productive life, reproductive performance, metabolic profile
Permanent URL:
ID Code:2069
Faculty:VH - Faculty of Veterinary Medicine and Animal Science
Department:(VH) > Dept. of Clinical Sciences
Deposited By: Nils Fall
Deposited On:21 Aug 2009 00:00
Metadata Last Modified:02 Dec 2014 10:16

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