ArticleFactors Affecting Seasonal Variation in 90-Day Nonreturn Rate To First Service in Lactating Holstein Cows in a Hot Climate1
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Key words
nonreturn rate
cattle
heat stress
fertility
Abbreviation Key
90-d NRR
90-d nonreturn rate to first service
ME
mature equivalent
Tav
the average of minimum and maximum daily temperature
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This is Journal Series Number R-06854 of the Florida Agricultural Experiment Station. Research was supported in part by grants from USDA NRICGP (#96-35205-3728), USDA-TSTAR (#95-34135-1860), and the Florida Milk Checkoff Program.
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Copyright © 1999 American Dairy Science Association. Published by Elsevier Inc. All rights reserved.