Browsing Dairy Day, 1987 by Subject "Lactation"

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Browsing Dairy Day, 1987 by Subject "Lactation"

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  • Early lactation somatic cell count should be low
    Dunham, J.R. (Kansas Agricultural Experiment Station, 1987)
    Cows and heifers in milk for fewer than 50 days, as shown on the DHIA Somatic Cell Count report, should have a lower average Somatic Cell Count than cows in milk for more than 300 days, if the dry cow mastitis treatment ...
  • Feeding and managing early lactation cows
    Dunham, J.R. (Kansas Agricultural Experiment Station, 1987)
    Feeding and managing dairy cows during the prepartum and early lactation periods have more effect on total lactation yields than all other factors. It is during this time that the pattern of milk production is established ...
  • Influence of prebreeding progesterone plus prostaglandin F2-alpha on estrus and fertility in lactating dairy cows
    Mee, M.O.; Stewart, R.E.; Stevenson, J.S.; Call, E.P. (Kansas Agricultural Experiment Station, 1987)
    Progesterone administered before breeding may increase estrous expression and subsequent fertility in lactating dairy cows. Holstein cows (n=302) were assigned randomly at calving to three groups. Cows received no ...
  • Update on gonadotropin-releasing hormone treatments for repeat breeders
    Stevenson, J.S. (Kansas Agricultural Experiment Station, 1987)
    In three of six studies involving over 1,650 cows, treatment of lactating dairy cows with 100 µg GnRH (2 cc Cystorelin®) at the time of third or fourth insemination improved conception rates by 12 percentage points. When ...