Browsing Dairy Day, 2001 by Title

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Browsing Dairy Day, 2001 by Title

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  • Bacterial degardation of milk components is affected by storage temperature and time
    Zimmerman, S.; Jeon, I.J.; Shirley, J.E.; McVay, L.; Ferdinand, E.; Sukup, D.; Schmidt, K.A. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2001)
    Raw milk is an excellent medium for bacterial growth. The objective of this study was to evaluate the number of microbes and component degradation in raw milk. Milk fat content did not affect bacteria counts. As storage ...
  • Changes in rumen capacity of dairy cows during the periparturient period
    Park, A.F.; Shirley, J.E.; DeFrain, J.M.; Titgemeyer, E.C.; Ferdinand, E.E; Cochran, R.C.; Schmidt, D.G.; Ives, S.E.; Nagaraja, T.G. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2001)
    Four-ruminally fistulated, multiparous, pregnant Holstein cows were studied to characterize ruminal adaptations during the transition from gestation to lactation. Cows were fed typical far-off and close-up diets, a late ...
  • Drinking water requirements for lactating dairy cows
    Brouk, M.J.; Smtih, J.F.; Harner, J.P.; DeFrain, S.R. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2001)
    A study to determine the amount and location of water consumption in dairy freestall barns located in northeastern Kansas was conducted during the summer of 2000. Three farms, two Holstein farms with either 2-row or ...
  • Effect of fan placement on milk production and dry matter intake of lactating dairy cows housed in a 4-row freestall barn
    Brouk, M.J.; Smith, J.F.; Harner, J.P.; DeFrain, S.E. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2001)
    Heat stress reduces milk production, feed intake, and reproductive efficiency each summer in Kansas. Without heat abatement procedures, milk production may decline 20- 30% during the summer months. Research has shown ...
  • Effect of headlocks on milk production and feed intake of dairy cattle
    Brouk, M.J.; Smtih, J.F.; Harner, J.P.; DeFrain, S.E. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2001)
    Cows previously trained with headlocks did not increase milk production or feed intake when headlocks were removed. Twoyear- old and older cows did not differ in response to headlocks and neckrails. Prudent use of ...
  • Effects of a biological additive and sealing technique on the aerobic stability of whole-plant corn silage
    Uriarte, M.E.; Bolson, K.K.; Pope, R.V. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2001)
    The objectives of this whole-plant corn study were to determine the effects of a biological additive and sealing technique on yeast and mold populations; and to examine the relationship between the microbial and chemical ...
  • Evaluation of heat stress in 4- and 6-row freestall buildings located in northwest Iowa
    Smith, J.F.; Brouk, M.J.; Harner, J.P. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2001)
    A trial was conducted in the summer of 2000 to evaluate the effect of 4- and 6-row freestall barns located in northwest Iowa on barn temperature, barn humidity, and respiration rates of lactating Holstein cows. ...
  • Extralabel mastitis theraphy: what does it mean?
    Roberson, J.R. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2001)
    Extra-label drug use (ELDU) is needed to provide optimal therapy for ill dairy cattle. Proper ELDU requires cooperation and compliance between the veterinarian and producer to ensure that proper drug withdrawal times ...
  • Fertility after synchronization of estrus in dairy heifers using GnRH, PGF2a, and Progesterone (CIDR)
    Richardson, A.M.; Hensley, B.A.; Stevenson, J.S. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2001)
    Our objective was to determine fertility of heifers after synchronization of estrus using PGF2", preceded by progesterone, GnRH, or both. Dairy heifers (n = 246) were assigned randomly to three treatments: 1) 50 :g ...
  • Impact of dairy manure addition on soil nutrients in northeast and south central Kansas
    Strahm, T.; Harner, J.P.; Murphy, J.P.; Key, D.V.; McCormack, G.; Smith, J.F. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2001)
    Sixty four percent of the fields (14 of 22) in northeast and south central Kansas would be able to apply dairy manure on a nitrogen basis if the current swine manure application regulations were adopted. Due to high ...
  • Impact of milk production and important management factors on the process of dry-off in lactating dairy cows
    Dingwell, R.T.; Leslie, K.E.; Sargeant, J.M.; Schukken, Y.H.; Timms, L.L. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2001)
    A study of 250 cows located in Canada and the United States revealed the rate of new mammary infections was 9.9% during the dry period. Average milk production on the day prior to dry-off was 13.2 ± 7.2 kg. The odds ...
  • Influence of freestall building orientation on comfort of lactating dairy cattle during summer heat stress
    Smith, J.F.; Brouk, M.J.; Harner, J.P. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2001)
    A trial was conducted during the summer of 2000 to evaluate the effect of freestall building orientation—east-west vs. northsouth— on respiration rates of lactating dairy cows, temperature-humidity index (THI) in the ...
  • Management of natural service bulls on large dairies
    Chenoweth, P.J.; Smith, J.F. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2001)
    Natural service (NS) bulls are widely used on large dairy farms despite the wellproven genetic progress achievable through AI. Producers may choose to use NS bulls for a variety of reasons that are discussed below. ...
  • Performance of holstein cows fed wet corn gluten feed or soyhull-steep liquor pellets during early lactation
    Ferdinand, E.E.; Shirley, J.E.; Titgemeyer, E.C.; Park, A.F.; DeFrain, J.M. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2001)
    Wet corn gluten feed and soyhull-steep liquor pellets tended to increase dry matter intake and milk yield. Combining condensed corn steep liquor with raw soybean hulls provides a convenient source of digestible fiber ...
  • Presynchronization of estrous cycles in dairy cows before ovsynch + CIDR and resynchronization of repeat estrus using the CIDR
    El-Zarkouny, S.Z.; Cartmill, J.A.; Richardson, A.M.; Medina-Britos, M.A.; Hensley, B.A.; Stevenson, J.S. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2001)
    Postpartum anestrus is one of the major limitations to achieving acceptable pregnancy rates. The Ovsynch protocol is an excellent tool to improve reproductive efficiency of dairy cows because it can induce estrous ...