Browsing Dairy Day, 1987 by Title

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Browsing Dairy Day, 1987 by Title

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  • Concentrations of progesterone and conception rates in Holstein heifers after hCG administration during the first 3 weeks after estrus
    Stewart, R.E.; Mee, M.O.; Stevenson, J.S. (Kansas Agricultural Experiment Station, 1987)
    We conducted two experiments to determine the effects of administering human chorionic gonadotropin (hCG) on day 4 or on days 15, 16, and 17 after estrus on conception rates and progesterone secretion by the corpus luteum ...
  • Cow-side milk progesterone testing
    Call, E.P.; Stevenson, J.S. (Kansas Agricultural Experiment Station, 1987)
    Cow-side milk progesterone tests are effective in determining the presence of an active corpus luteum (CL) on the ovary. The test is best used as an adjunct to the Preventive Herd Health Program (PHHP) as a means of ...
  • Dry cow management program
    Smith, J.F. (Kansas Agricultural Experiment Station, 1987)
    Dry cows do not require the intensive daily management of cows in early lactation, but the handling of mastitis treatments, feeding regimen, and grouping are of utmost importance in determining how the cows will perform ...
  • 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 ...
  • Effect of production on reproduction
    Call, E.P. (Kansas Agricultural Experiment Station, 1987)
    The genetic antagonsim that exists between production and reproduction is overcome by sound management practices. Kansas Holstein herds were ranked by quartile and analyzed by comparing various reproductive traits. Higher ...
  • Effect of ruminal protozoa on performance of early-weaned calves
    Anderson, K.L.; Nagaraja, T.G.; Morrill, J.L.; Reddy, P.G.; Avery, T.B.; Anderson, N.V. (Kansas Agricultural Experiment Station, 1987)
    Twenty newborn bull calves assigned to two groups, protozoa-free or protozoa-inoculated, were used to determine the effects of ruminal protozoa on performance of early weaned calves. Calves in the protozoa group were ...
  • Effect of supplemental potassium and buffer in starters for early-weaned calves
    Flynn, P; Morrill, J.L.; Reddy, P.G.; Higgins, J.J. (Kansas Agricultural Experiment Station, 1987)
    Sixty Holstein heifers were used from birth to 8 weeks of age to study the effect of amount of potassium (K) in the diet and of adding a buffer to the starter. Starters were formulated with and without 1% trona, a natural ...
  • Evaluation of a calf starter supplement
    Morrill, J.L.; Reddy, P.G. (Kansas Agricultural Experiment Station, 1987)
    An experimental calf starter made from a pelleted commercial type supplement and feeds readily available on the farm was compared to a conventional pelleted calf starter in an attempt to demonstrate an economical alternative ...
  • 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 ...
  • Further studies utilizing hormones to alter estrous cycles and fertility
    Stevenson, J.S; Stewart, R.E.; Call, E.P. (Kansas Agricultural Experiment Station, 1987)
    In one large dairy herd, we examined the reproductive performance of 943 cows following early postpartum hormonal therapy utilizing gonadotropin-releasing hormone (GnRH or Cystorelin®) and prostaglandin F2-alpha (PGF). ...
  • Glucose. starch, and dextrin utilization in the small intestine of steers
    Kreikmeier, K.K.; Harmon, D.L.; Avery, T.B.; Brandt, R.T. Jr. (Kansas Agricultural Experiment Station, 1987)
    Holstein steers (775 lbs) were surgically fitted with abomasal and ileal cannulae, portal and mesenteric venous catheters, and an elevated carotid artery. These steers were used to study starch digestion in the small ...
  • Gonadotropin-releasing hormone improves conception rates of repeat-breeders with previous reproductive disorders
    Stevenson, J.S.; Call, E.P. (Kansas Agricultural Experiment Station, 1987)
    An experiment examining the benefit of treating repeat-breeders with 100 µg GnRH (Cystorelin ®) at the time of third or fourth insemination was conducted in 513 dairy cows of which 93 (abnormal cows) had been diagnosed ...
  • How important is extra solids-not-fat in your milk?
    Roberts, H.A. (Kansas Agricultural Experiment Station, 1987)
    Milk with high solids-not-fat is valuable to the consumer for its flavor and nutritional value and to the manufacturer of milk products, especially relating to cheese yield. Solids-not-fat consists of all solids in milk ...
  • 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 ...
  • Performance of early weaned calves fed lasalocid
    Anderson, K.L.; Nagaraja, T.G.; Morrill, J.L.; Reddy, P.G.; Avery, T.B.; Anderson, N.V. (Kansas Agricultural Experiment Station, 1987)
    Twenty-two newborn, bull calves were used to determine the effects of lasalocid on growth and feed intake of early-weaned calves from week 1 to 12. Calves were assigned to lasalocid or control groups on day 3. Lasalocid-fed ...
  • Periparturient disorders in dairy cows
    Stevenson, J.S. (Kansas Agricultural Experiment Station, 1987)
    The economic climate in the dairy industry requires producers to operate efficiently to remain competitive. Attention to details and understanding of reproduction, metabolism, digestive functions, milk secretion, and all ...
  • Relative feeding value of three forage-based diets for Holstein heifers
    Shirley, J.E.; Morrill, J.L.; Carinder, W.H. (Kansas Agricultural Experiment Station, 1987)
    Soybeans interseeded with grain sorghum and harvested as a mixed forage silage crop can be used successfully as a feed for growing dairy heifers. However, daily gain is greater when grain sorghum silage plus alfalfa hay ...
  • Rumensin for the lactating dairy cow
    Kube, J.C.; Frey, R.A.; Shirley, J.E. (Kansas Agricultural Experiment Station, 1987)
    Two Holstein cows were fed Rumensin for 12 weeks, beginning approximately 90 days postpartum. Milk production increased 7%, whereas percentage fat in milk decreased 10.3%. Percentage protein in milk increased 9.6% in ...
  • 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 ...
  • Update on heat detection aids
    Stevenson, J.S.; Call, E.P (Kansas Agricultural Experiment Station, 1987)
    Poor heat detection is a major cause of reproductive failure in most dairy herds. About one-half of the heat periods are undetected, resulting in prolonged calving intervals. In many cases, the problem is serious enough ...