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Journal

Kansas Agricultural Experiment Station Research Reports

Dairy Science

1994

Keyword

Articles 1 - 17 of 17

Full-Text Articles in Life Sciences

Stage Of Lactation Profile Reflects Nutrition And Management, James R. Dunham Jan 1994

Stage Of Lactation Profile Reflects Nutrition And Management, James R. Dunham

Kansas Agricultural Experiment Station Research Reports

The Stage of Lactation Profile (SOLP) is a good estimate of the shape of the lactation curve for dairy herds. The SOLPs for herds with various milk production levels are somewhat similar. The rates of decline of all SOLPs are about the same. Therefore, the differences in production levels are about the same in late stages of lactation and in early lactation, regardless of production Rolling Herd Average (RHA). In addition, higherproducing herds have their highest level of production in the second stage of lactation (51 to 100 days in milk), whereas this occurs in the first stage of lactation …

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Effects Of Sunshades On Temperature And Cow Comfort, John E. Shirley Jan 1994

Effects Of Sunshades On Temperature And Cow Comfort, John E. Shirley

Kansas Agricultural Experiment Station Research Reports

Sunshades provide an effective method of reducing ultraviolet sunrays and increasing cow comfort.; Dairy Day, 1994, Kansas State University, Manhattan, KS, 1994;

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Manure Storage Structures For Small Dairies, Joseph P. Harner, James P. Murphy Jan 1994

Manure Storage Structures For Small Dairies, Joseph P. Harner, James P. Murphy

Kansas Agricultural Experiment Station Research Reports

Kansas environmental regulations require dairy producers with more than 300 animal units (215 mature cows at 1,400 lb, or equivalent weight) to be able to store the manure scraped from freestalls, lots, alleys, and holding pens for 120 days. Many dairies are smaller than the size requiring mandatory registration. However, some are considered a potential environmental problem because of their location near streams or waterways and/or their management and application of manure and may require registration. The intent of the regulations is that manure be stored from December to March to avoid applying it onto frozen ground. Most dairies consider …

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Effects Of Processing Sorghum Grain On Dairy Calf Performance, I.E.O. Abdelgadir, J.L. Morrill Jan 1994

Effects Of Processing Sorghum Grain On Dairy Calf Performance, I.E.O. Abdelgadir, J.L. Morrill

Kansas Agricultural Experiment Station Research Reports

Two trials evaluated the effect of processing sorghum grain on performance of young dairy calves. In trial 1, newborn Holstein calves (49 heifers and 27 bulls) were blocked by age and sex and assigned randomly to each of three calf starters containing either raw, roasted (Jet-Pro®) at 280 degrees F, or conglomerated (Jet-Pro®) sorghum grain. The conglomeration process consisted of grinding the grain, adding water, and pelleting the mixture, then roasting it. Raw and roasted sorghum grains were ground through a .125-inch screen and included in complete pellet starters, whereas conglomerated sorghum grain pellets were mixed with the other ingredients …

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Strategies For Small Dairy Farmers To Be Profitable And Competitive In The Future, B. Cropp Jan 1994

Strategies For Small Dairy Farmers To Be Profitable And Competitive In The Future, B. Cropp

Kansas Agricultural Experiment Station Research Reports

Profitable dairying will not become any easier in the future. Farm level milk prices will continue to be volatile. The government will not provide additional price or income support to dairies. Long-run milk prices will be either flat or perhaps even trending slightly lower. Average annual milk prices will be in the range of $12.00 to $13.25 per hundredweight. Dairy producers must be able to generate adequate net income at these milk price levels. Smaller dairy operators need to find means of being cost competitive with the larger operators. Without question, smaller producers can be profitable in the decade ahead …

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Rate And Extent Of Losses From Top Spoilage In Alfalfa Silages Stored In Bunker Silos, D.L. Holthaus, Matthew A. Young, L. Pfaff, B.E. Brent Jan 1994

Rate And Extent Of Losses From Top Spoilage In Alfalfa Silages Stored In Bunker Silos, D.L. Holthaus, Matthew A. Young, L. Pfaff, B.E. Brent

Kansas Agricultural Experiment Station Research Reports

Alfalfa silages were made in pilot- and farm-scale silos, and five sealing treatments were compared. After 90 days, sealing dramatically reduced dry matter (DM) losses at the 5 and 10 inch depths in the farm silos and at the 0 to 12, 12 to 24, and 24 to 36 inch depths in the pilot silos. Extending the storage period to 180 days in pilot silos had no effect on DM losses for sealed or delay-sealed silages, but DM losses for unsealed silages continued to increase at all three depths. Placing a roof over the unsealed, farm-scale silo increased the silage …

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Raising Dairy Heifers: A Business, J.L. Morrill Jan 1994

Raising Dairy Heifers: A Business, J.L. Morrill

Kansas Agricultural Experiment Station Research Reports

On many dairy farms, improvement is needed in raising replacement heifers, especially in providing proper nutrition and management to allow for freshening at 23 to 24 mo of age at a desirable size. With larger herds, there is a trend toward more specialization, which may (but may not) result in more attention to, or responsibility for, proper care and management of the heifer. In some cases, the heifers are raised by a person at a location away from the dairy farm on which they originated, and contract raising of dairy replacements has several potential advantages and disadvantages. These are discussed …

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Management Analysis Of Dairy Cow Herd Enterprises In The Kansas Farm Management Association, F.D. Delano, Michael R. Langemeier Jan 1994

Management Analysis Of Dairy Cow Herd Enterprises In The Kansas Farm Management Association, F.D. Delano, Michael R. Langemeier

Kansas Agricultural Experiment Station Research Reports

Actual records of dairy cow herd enterprises from Kansas Farm Management Association farms over the past 4 years have shown an increase in returns over variable costs from $17,900 to $27,000 per farm for a 100-cow dairy herd in favor of herds with higher milkproducing cows. Cost per hundred weight of milk produced per cow decreased for the higher-producing herds compared with lowerproducing herds, even though total cost per cow increased. In 1993, for every extra $1.00 spent on feed and other variable costs, the higher producing herds earned $2.34. This was a 234% return per dollar invested.; Dairy Day, …

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Diameter Of Ovarian Follicles, Estradiol, And Progesterone Concentrations, And Pregnancy Rates In Cattle Treated With Progestins And Pgf, M.W Smith, Jeffrey S. Stevenson Jan 1994

Diameter Of Ovarian Follicles, Estradiol, And Progesterone Concentrations, And Pregnancy Rates In Cattle Treated With Progestins And Pgf, M.W Smith, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Holstein cows and virgin heifers were treated with progestins and PGF before first 2a service to determine their influence on reproductive traits. Control cows were given two injections of PGF 14 days apart and 2a inseminated at estrus after the second injection. Two groups received a norgestomet ear implant (N1) or a progesterone-releasing intravaginal device (PRID; P1) 8 days after one injection of PGF , followed the next day by PGF to 2a 2a regress the corpus luteum, and the progestin source was removed 7 days later. The last two treatments were similar except the second injection of PGF was …

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Total Mixed Rations For Feeding Dairy Heifers From 3 To 6 Months Of Age, H. Terui, J.L. Morrill, James J. Higgins Jan 1994

Total Mixed Rations For Feeding Dairy Heifers From 3 To 6 Months Of Age, H. Terui, J.L. Morrill, James J. Higgins

Kansas Agricultural Experiment Station Research Reports

Total mixed rations (TMR) with different forage (F):concentrate (C) ratios were fed to Holstein heifers (n = 135) 12 to 24 wk of age. In four trials, the heifers were divided into different age groups and fed three different F:C ratios. Based on the results, the following recommendations are made. First, if facilities are available for only two groups from 12 to 24 wk of age and heifers are at the desired body weight (BW) at 12 wk of age, they should fed a diet similar to the experimental TMR 50:50 with a F:C ratio of 50:50 from 12 to …

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Effect Of Yearly Milk Per Cow On Various Reproduction Traits, Edward P. Call Jan 1994

Effect Of Yearly Milk Per Cow On Various Reproduction Traits, Edward P. Call

Kansas Agricultural Experiment Station Research Reports

An analysis of 4,334 Holstein dairies confirms the negative genetic correlation that exists between milk production and reproduction. The most obvious traits affected are services per conception and conception rate. When subjected to analysis by the KSU Dairy Herd Analyzer (DHA) program, higher-producing herds have less economic loss because their managers do a better job of controlling factors not under genetic control, such as average days dry and age at calving of first-calf heifers (L-1). Higher-producing herds also have fewer cows that are open and should be bred.; Dairy Day, 1994, Kansas State University, Manhattan, KS, 1994;

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Influence Of Source Of Calories On Composition And Production Of Milk, A.J. Gallegos, John E. Shirley Jan 1994

Influence Of Source Of Calories On Composition And Production Of Milk, A.J. Gallegos, John E. Shirley

Kansas Agricultural Experiment Station Research Reports

Wheat and tallow increased milk production in a complementary fashion when added to a milo-based grain mix.; Dairy Day, 1994, Kansas State University, Manhattan, KS, 1994;

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Managing High Milk-Producing Herds Ix. Raising Dairy Heifers And Steers: A Business. Surving Gatt, Nafta, And The 1995 Farm Bill, John E. Shirley Jan 1994

Managing High Milk-Producing Herds Ix. Raising Dairy Heifers And Steers: A Business. Surving Gatt, Nafta, And The 1995 Farm Bill, John E. Shirley

Kansas Agricultural Experiment Station Research Reports

The primary focus of the dairy industry in Kansas has been the milking herd. However, dairy heifer replacements and dairy steers offer income opportunities that have been largely ignored by some Kansas dairy producers. The 1994 Dairy Day program highlights these programs as potential profit centers. An "opportunity cost" analysis comparing the economic returns from your present enterprises with the potential returns from a dairy heifer or steer enterprise might propel you into a new career or enhance the profitability of your total operation.; Dairy Day, 1994, Kansas State University, Manhattan, KS, 1994;

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Evaluation Of Enzyme-Modified Wheat Gluten As A Component Of Milk Replacers For Calves, H. Terui, J.L Morrill, James J. Higgins Jan 1994

Evaluation Of Enzyme-Modified Wheat Gluten As A Component Of Milk Replacers For Calves, H. Terui, J.L Morrill, James J. Higgins

Kansas Agricultural Experiment Station Research Reports

Holstein bull calves (n=120) were assigned randomly to be fed either of five milk replacers (MR) that contained different amounts of crude protein (CP) and protein from wheat gluten (WG) for 6 weeks. Weight gains of calves fed MR containing 20% CP, with either 0, 30, or 50% of the protein coming from WG, were similar, as were gains of calves fed MR containing 18% CP with either none or 33% of the protein from WG. When WG supplied 33% of the protein, calves fed 18% CP gained as much as calves fed MR containing 20% CP. Calves fed MR …

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Use Of Gnrh And Pgf For Synchronized Ovulation And Fixed-Time Inseminations, Y. Kobayashi, Jeffrey S. Stevenson Jan 1994

Use Of Gnrh And Pgf For Synchronized Ovulation And Fixed-Time Inseminations, Y. Kobayashi, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Holstein cows and virgin heifers were treated with GnRH and PGF in a novel 2a ovulation synchronization protocol, which involves one fixed-time insemination. One injection of GnRH is given on a Monday morning, followed in 7 days with an injection of PGF . Approximately 32 hr later, ovula- 2a tion is induced with a second injection of GnRH, and one insemination is made 18 hr later. Control cattle were given one injection of PGF and inseminated at estrus. Preg- 2a nancy rates measured between 28 and 35 days after insemination by ultrasonography were slightly, but not significantly, higher in controls …

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Ruminal Degradation Of Dietary Protein In Steers Fed Lasalocid, R.H. Wessels, Evan C. Titgemeyer, Jean G. St. Jan 1994

Ruminal Degradation Of Dietary Protein In Steers Fed Lasalocid, R.H. Wessels, Evan C. Titgemeyer, Jean G. St.

Kansas Agricultural Experiment Station Research Reports

A trial was conducted to investigate the effect of lasalocid (Bovatec®) on ruminal degradation of dietary protein in Holstein steers. Five ruminally and duodenally cannulated steers (305 kg) were fed a corn-alfalfasoybean meal diet (17% CP), with or without lasalocid, in a three period, switch-back experiment. Ruminal pH, ammonia, volatile fatty acids, and amino acid and peptide concentrations were unaffected by lasalocid. Lasalocid reduced (P<.05) ruminal protease activity by 15%, but did not change deaminase activity. Digestibilities of dry matter, organic matter, fiber, and crude protein were similar between treatments. Intestinal flows of microbial and feed crude protein fractions, as well as amino acids, remained unchanged when lasalocid was fed. Thus, in this experiment, lasalocid failed to decrease feed protein degradation in the rumen and, therefore, was unable to increase the supply of crude protein or amino acids to the small intestine.; Dairy Day, 1994, Kansas State University, Manhattan, KS, 1994;

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Evaluation Of Milk Replacers Containing New Protein Soruces And A Probiotic, J.L Morrill, J.F. Laster, J.M. Morrill, A.M. Feyerherm Jan 1994

Evaluation Of Milk Replacers Containing New Protein Soruces And A Probiotic, J.L Morrill, J.F. Laster, J.M. Morrill, A.M. Feyerherm

Kansas Agricultural Experiment Station Research Reports

The objectives of this experiment were to evaluate bovine and porcine plasma proteins as sources of protein for calf milk replacers and to evaluate a commercial probiotic. Four replacers were compared; an all milk protein control, two replacers with 25% of protein from bovine plasma protein or porcine plasma protein, and a replacer identical to the control except that it contained a probiotic (Biomate FG, Chr. Hansen's Laboratory) instead of antibiotic. The 120 bull calves (7 ± 3 days of age) were divided into four equal groups, and calves from each group were fed 4 quarts per day of one …

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