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Browsing Dairy by Published Date

Browsing Dairy by Published Date "1991"

Now showing items 1-11 of 11

Severe flea infestation in dairy calves

Dryden, Michael W.; Broce, A. B. (Kansas Agricultural Experiment Station, 2011-08-02)

In June 1991, an investigation was conducted of a severe flea infestation in 23 Holstein dairy calves in South Central Kansas. Inspection of the dairy revealed massive numbers of fleas on calves and in the barn where ...
Release of parasitic wasps to control stable flies in Kansas dairies

Greene, G. L. (Kansas Agricultural Experiment Station, 2011-08-02)

After release of fly parasites in Kansas dairies during 1991, parasitism increased from May to late June then dropped in July. The parasite released was Spalangea nigroaenea of Kansas origin to assure its adaption to ...
Pregnancy rates of holstein cows after postinsemination treatment with progesterone

Stevenson, Jeffrey S.; Mee, M. O. (Kansas Agricultural Experiment Station, 2011-08-02)

The objective of this experiment was to determine if pregnancy rates following first services would be improved by supplementing lactating dairy cows with progesterone during two phases after insemination. Cows were ...
Performance of mid-lactating dairy cows fed a grain sorghum-soybean silage base diet

Hartadi, H.; Harbers, L.; Shirley, John E.; Bolsen, K. (Kansas Agricultural Experiment Station, 2011-08-02)

Whole-plant silage from intercropped grain sorghum and Williams 82 soybean was compared to corn silage in a mixed diet for mid-lactation dairy cows. Cows fed the grain sorghum-soybean silage yielded 45.13 lb and those ...
Performance of holstein heifers reared on 100 or 115% of NRC requirements from 3 to 12 months of age and then switched to the opposite treatment

Bortone, E. J.; Daccarett, M. G.; Morrill, J. L.; Stevenson, Jeffrey S.; Feyerherm, A. M. (Kansas Agricultural Experiment Station, 2011-08-02)

Holstein heifers from the Kansas State University Dairy Teaching and Research Unit were used from 3 mo of age until 21 d before estimated date of calving. They were fed either 100 (control, C) or 115% (enhanced, E) of ...
Performance of holstein calves from three to twelve months of age

Velazco, J.; Morrill, J. L.; Brandt, Robert T., Jr.; Schalles, R. (Kansas Agricultural Experiment Station, 2011-08-02)

Sixty-four Holstein steers were used to study the effect of season and age on performance. Animals beginning the trial in spring were heavier (P<.05) and more efficient than calves started in other seasons. There were ...
Leukocyte function and health status of calves supplemented with vitamins A and E

Eicher-Pruiett, S. D.; Morrill, J. L.; Blecha, Frank; Chitko-McKown, C. G.; Anderson, N. V. (Kansas Agricultural Experiment Station, 2011-08-02)

Forty-four Holstein calves were fed milk replacers with varied concentrations of vitamins A and E from 3 to 45 d of age to determine their effects on concentrations of plasma vitamin A (retinol and retinyl palmitate) ...
Heifer feeding and management affect efficiency

Dunham, James R. (Kansas Agricultural Experiment Station, 2011-08-02)

Heifer feeding and management programs have a great impact on the efficiency of the future dairy herd. Dairies that feed and manage heifers for calving at about 24 mo of age are optimizing milk production, feed cost ...
Effects of aspergillus oryzae extract (amaferm) on ruminal fibrolytic bacteria and in vitro fiber degradation

Beharka, A. A.; Nagaraja, T. G. (Kansas Agricultural Experiment Station, 2011-08-02)

The effect of Amaferm on growth of pure cultures of ruminal cellulose-digesting, hemicellulose- digesting and pectin-digesting bacteria was determined. The addition of Amaferm to the growth medium increased the growth ...
The effect of processed soybeans and added energy in calf starters on the growth of holstein calves

Reddy, P. V.; Morrill, J. L. (Kansas Agricultural Experiment Station, 2011-08-02)

In Trial 1, 91 Holstein calves were fed starters containing either soybean meal (SBM), extruded soybeans (ESB), roasted soybeans (RSB), SBM+soy oil (SO), or SBM+rumen inert fat (RIF) from birth to 10 wk of age. There ...
Administration of GnRH at insemination in repeat breeding dairy cows: improved pregnancy rates, hormone secretion, and luteal function

Stevenson, Jeffrey S.; Mee, M. O.; Call, Edward P. (Kansas Agricultural Experiment Station, 2011-08-02)

Administering saline to 14 repeat breeders or 100 μg GnRH to 38 repeat breeders resulted in a greater (P=.07) proportion of pregnancies at 42 to 56 days after third service and fewer (P<.05) lost pregnancies during the ...