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2 edition of Rate and efficiency of gains in beef cattle. found in the catalog.

Rate and efficiency of gains in beef cattle.

M. A. MacDonald

Rate and efficiency of gains in beef cattle.

by M. A. MacDonald

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  • 14 Currently reading

Published by Agricultural Experiment Station, Oregon State College in Corvallis .
Written in

  • Beef cattle -- Metabolism.,
  • Urine -- Analysis.,
  • Beef cattle -- Feed utilization efficiency.

  • Edition Notes

    Other titlesUrinary specific gravity, pH, and buffer capacity in beef cattle.
    StatementM.A. MacDonald, Hugo Krueger, Ralph Bogart.
    SeriesTechnical bulletin / Oregon State College, Agricultural Experiment Station -- 54., Technical bulletin (Oregon State College. Agricultural Experiment Station) -- 54.
    ContributionsKrueger, Hugo 1902-, Bogart, Ralph, 1908-
    The Physical Object
    Pagination40 p. :
    Number of Pages40
    ID Numbers
    Open LibraryOL16091170M

    Driftless Region Beef Conference 3 Beef Cattle Feed Efficiency Dan W. Shike, Ph.D., University of Illinois at Urbana-Champaign Introduction Feed efficiency is currently a very popular topic among cattle producers and researchers. However, this is not a new concept. Researchers have been studying feed efficiency for 40 by: 3. For Exp. 2, animals fed a hay-only control diet had similar (P > ) rates and efficiencies of BW gain as those fed diets supplemented with barley. Barley processing had no effect (P > ) on rate or efficiency of gain for cows or calves. There was no economic advantage to rolling light test-weight barley when fed at % of by: 8.

    Greenhouse gas emissions from three different beef production strategies in the Midwestern USA were evaluated with a life-cycle assessment approach using cows and three bulls with 90% calving rate and 15 replacement heifers [24].   Animal performance of cattle in the feedlot is relatively consistent and must be at an acceptable level for cattle feeders to be profitable. Dairy calves being raised to 6 months old can have highly variable levels of animal performance. Much of the variability of growth rates and feed efficiency can be attributed to the health status of : Frank Wardynski.

    DES was approved by the FDA in as an additive for beef cattle finishing rations, but was banned in by the FDA due to research linking DES and cancer development. 8. Using mid-February value of gain, based on nearby futures feeder and fed-cattle prices, Sawyer says that at a conversion rate, the breakeven cost of the supplement ingredient is 24¢/lb., about $/ton. “So, yes, there are some very cost-effective feed ingredients to use, even at today's prices.” Feed rather than forageAuthor: Wes Ishmael.

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Rate and efficiency of gains in beef cattle by M. A. MacDonald Download PDF EPUB FB2

Performance information on each animal included average rate. of gain on feed test (rate of gain), average feed consumed per pounds gain, and age in days at and pounds body weight. These data are presented in Tables 1 and 2 for reference purposes. lin fractions with rate of gain and economy of gain in beef cattle or other domestic animals.

However, past investigations do provide normal values from which comparisons can he made with the present study. In an electrophoresic study of the blood plasma from 20 species of animals, including domestic animals and birds, Deutsch and Good.

in rate of gain. Between pounds and pounds the average daily gain was pounds for bulls and pounds for heifers. Effect of age of dam on weight of calves Both body weight and producing ability of a cow increase with age, up to a certain age. According to Sawyer et al. (), 2-year. economy of gain during the test period, and (c) on gain per day from birth to the end of the test.

3 Rate and Efficiency of Gains in Beef Cattle CECIL D. PIERCE, H. AVERY, MARTIN BURRIS, RALPH BOGART* Introduction Effective selection in beef cattle improvement depends upon the relative value of factors used in that selection.

If selections are. GAINS IN BEEF CATTLE between testosterone-treated and control heifers in amount of hind. quarter was per cent and that for the steers was per cent. A significant interaction was found between the effect of testos.

terone and sex of calf on the per cent of round. Hereford cattle were individually fed on a concentrate and hay ration to appetite, 6 bullocks and 6 heifers being treated as controls and 12 similar animals receiving intramuscular injections of 1 mg. testosterone per kg. bodyweight weekly during growth from to lb.

liveweight. Heifers showed an immediate response to the injections, gaining lb. daily more than the control Cited by: 1. For part 5 see Abst.Vol. The animals and samples were those described above. Correlations were studied between individual blood constituents and performance after weaning and between the same constituent at and lb.

bodyweight. Blood Hb at lb., average g. per ml., was significantly lower for males than females in both by: 1. Hereford calves born in the spring and early summer were subjected to a to day test feeding period during the following winter. Birthweight, gains during the suckling period, and age and weight at the start of the test period (independent factors) were related to rate and economy of gains during the test period, and to gains per day from birth to the end of test, by multiple Cited by: 5.

Bulletin: Rate and efficiency of gains in beef cattle. Breed, line, and sex differences for some blood constituents of young beef cattle. pp : D. Price, G.

Alexander, Hugo Krueger, Ralph Bogart. For part 4 see Abst.Vol. Rate of gain of weight and feed economy were measured in 44 weaned Hereford and Aberdeen Angus calves of several strains for the period during which they grew from to lb.

At lb. serum inorganic phosphate, alkaline phosphatase and acid phosphatase were estimated. The relations between the different strains and breeds, Cited by: 3. ASPECTS OF RATE AND EFFICIENCY OF GAIN IN BEEF CATTLE AMD HERITABILITY ESTIMATES by Huibert Doornenbal A Thesis Submitted i n P a r t i a l F u l f i l m e n t of ements f o r the Degree,of MASTER OF SCIENCE IN AGRICULTURE in the Department of Animal Science We accept t h i s t h e s i s as conforming to the standard.

production in beef enterprises • As corn prices approached and exceeded $7 per bushel, feed costs were nearly 80% of the cost in many feedlot operations • A feed efficiency improvement of approximately 10% across the entire feedlot sector would reduce feed costs $ Billion in (Weaber, ) • Fewer resources used = improved global food security.

Food intake, eating rate, weight gains, metabolic rate and efficiency of feed utilization in Bos taurus and Bos indicus crossbred cattle - Volume 25 Issue 3 - Cited by: PRODUCTIVITY AND EFFICIENCY OF CATTLE BREEDS (From: "Characterization of beef cattle breeds by virtue of their performances in the National Beef Cattle Performance and Progeny Testing Scheme".

,26(1) by S J Schoeman) Breed averages for 16 breeds over 14 years. Nearly 3/4 mil. weaning records and growth testFile Size: KB. The efficiency of beef production goes from 55kg beef per AE per year at a 50pc weaning rate up to kg at a 90pc weaning rate.

This indicates that the maximum productivity of the breeding females described, once fully grown, is around kg beef/AE/year. The protein gain due to dietary shift from beef to poultry will increase by % (panel (b)), meeting the protein needs of million additional people consuming 70 g protein d −1 (as in the MAD).

Protein values are in Mt (10 9 kg). The caloric loss following substitution is calculated based on the conversion efficiency for poultry and the by: The relationship between rate and efficiency of gain, and the environmental factors affecting them, are of major importance in a selection program.

Selection within recent years has tended to be mainly for improvement of breed type. As a result of this selection, improvement in type has taken place in the beef breeds, but a comparable improvement in performance does not seem Author: Leo E.

Lucas. The break-even purchase price tables show the importance of the daily rate of gain in another way. For a producer who receives a fall price of $ per pound on beef stockers, increasing the daily rate of gain from to pounds per day means that he or she can spend $ more per pound on calves in the spring and still break even.

In animal husbandry, feed conversion ratio (FCR) or feed conversion rate is a ratio or rate measuring of the efficiency with which the bodies of livestock convert animal feed into the desired output.

For dairy cows, for example, the output is milk, whereas in animals raised for meat (such as beef cows, pigs, chickens, and fish) the output is the flesh, that is, the body mass.

Combining the knowledge of feed cost with feed conversion, the high roughage example has a $ feed cost per pound of gain and the low roughage example has a $ feed cost per pound of gain.

If cattle were bought weighing pounds at $/cwt and expected to sell for $/cwt when weighing pounds, the value of gain is $/lb. More profits — by enhancing cattle health and maximizing feed efficiency and weight gains ACTOGAIN™ 45 (ractopamine hydrochloride) Feeding ACTOGAIN™ 45 in the last 28 to 42 days allows energy to be redirected to make more lean muscle and less fat, resulting in: • Increased rate of weight gain • Improved feed efficiency • Increased.

Average daily gain (ADG) is a performance measure that many beef cattle producers monitor. Average daily gain is simply the rate of weight gain per day over a specified period of time. For example, if a calf weighs pounds on June 1 and later weighs pounds on July 31 of that same year, then it gained pounds in 60 days.For the DREC, the numbers and are important baseline figures that should help evaluate the shifting trends in beef production.

As soon as the dollars catch up to the gain, the added value that is represented by pounds per day gain on grass versus pounds per day gain in the feedlot can be assessed.