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Cattle fattening, feed efficiency

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https://www.readbyqxmd.com/read/27878919/effect-of-health-status-on-fattening-performance-in-young-crossbred-polish-holstein-friesian-%C3%A3-limousin-bulls-and-steers
#1
Zofia Wielgosz-Groth, Monika Sobczuk-Szul, Zenon Nogalski, Paulina Pogorzelska-Przybyłek, Cezary Purwin
The aim of this study was to determine the effect of disease incidence on selected parameters of cattle fattening performance and carcass quality, and the fatty acid profile of beef. The experimental materials comprised 16 bulls and 16 steers, Polish Holstein-Friesian × Limousin crossbreeds (including 10 healthy and six treated animals of each category). At 5 weeks of age, bloodless castration was carried out using a rubber elastrator. The calves were fed milk replacer provided in automatic feeding stations...
November 23, 2016: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/27608523/impact-of-including-growth-carcass-and-feed-efficiency-traits-in-the-breeding-goal-for-combined-milk-and-beef-production-systems
#2
P Hietala, J Juga
Improving feed efficiency in dairy cattle could result in more profitable and environmentally sustainable dairy production through lowering feed costs and emissions from dairy farming. In addition, beef production based on dairy herds generates fewer greenhouse gas emissions per unit of meat output than beef production from suckler cow systems. Different scenarios were used to assess the profitability of adding traits, excluded from the current selection index for Finnish Ayrshire, to the breeding goal for combined dairy and beef production systems...
September 9, 2016: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/26585480/economic-values-for-health-and-feed-efficiency-traits-of-dual-purpose-cattle-in-marginal-areas
#3
Z Krupová, E Krupa, M Michaličková, M Wolfová, R Kasarda
Economic values of clinical mastitis, claw disease, and feed efficiency traits along with 16 additional production and functional traits were estimated for the dairy population of the Slovak Pinzgau breed using a bioeconomic approach. In the cow-calf population (suckler cow population) of the same breed, the economic values of feed efficiency traits along with 15 further production and functional traits were calculated. The marginal economic values of clinical mastitis and claw disease incidence in the dairy system were -€ 70...
January 2016: Journal of Dairy Science
https://www.readbyqxmd.com/read/26440323/beef-species-symposium-beef-production-without-mature-cows
#4
G E Seidel, J C Whittier
Nutrients in animal feed get partitioned to growth, lactation, pregnancy, fat accretion, and/or maintenance. For mature beef cows, >80% of nutrients consumed annually go to unproductive maintenance. Integrated over the entire U.S. beef cattle production system, nearly one-half of the nutrients consumed go to maintenance of cow herds. This accounts for much of the inefficiency of beef production and can be minimized by the single-calf heifer system, in which heifers are fattened and slaughtered after having their first calf...
September 2015: Journal of Animal Science
https://www.readbyqxmd.com/read/26420449/estimation-of-potassium-and-magnesium-flows-in-animal-production-in-dianchi-lake-basin-china
#5
Yuta Amachika, Hiroki Anzai, Lin Wang, Kazato Oishi, Chagan Irbis, Kunzhi Li, Hajime Kumagai, Tatsuya Inamura, Hiroyuki Hirooka
The objectives of this study were to estimate and evaluate potassium (K) and magnesium (Mg) budgets and flows of animal production in the basin of Dianchi Lake, China. Feed sampling and farmer interviews were conducted in field surveys. The supplies of K and Mg from local and external feeds and the retention, production and excretion of animals were calculated individually for dairy cows, fattening pigs, breeding sows, and broilers and laying hens. The K and Mg flows on a regional level were estimated using the individual budgets...
July 2016: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/25557813/effect-of-by-product-feed-based-silage-feeding-on-the-performance-blood-metabolites-and-carcass-characteristics-of-hanwoo-steers-a-field-study
#6
Y I Kim, J M Park, Y H Lee, M Lee, D Y Choi, W S Kwak
This study was conducted to determine the effects of feeding by-product feed (BF)-based silage on the performance, blood metabolite parameters, and carcass characteristics of Hanwoo steers. The BF-based silage was composed of 50% spent mushroom substrate, 21% recycled poultry bedding, 15% cut ryegrass straw, 10.8% rice bran, 2% molasses, 0.6% bentonite, and 0.6% microbial additive (on a wet basis), and ensiled for over 5 d. Fifteen steers were allocated to three diets during the growing and fattening periods (3...
February 2015: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/25458706/cost-assessment-of-the-movement-restriction-policy-in-france-during-the-2006-bluetongue-virus-episode-btv-8
#7
Damian Tago, James K Hammitt, Alban Thomas, Didier Raboisson
This study aims at evaluating the costs of the movement restriction policy (MRP) during the 2006 BTV-8 epidemic in France for the producers of 6-9 month old Charolais beef weaned calves (BWC), an important sector that was severely affected by the restrictions imposed. This study estimates the change in the number of BWC sold that was due to the movement restrictions, and evaluates the economic effect of the MRP. The change in BWC sold by producers located inside the restriction zone (RZ) was analyzed for 2006 by using a multivariate matching approach to control for any internal validity threat...
December 1, 2014: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/25414107/effects-of-feeding-diets-rich-in-%C3%AE-linolenic-acid-and-copper-on-performance-carcass-characteristics-and-fatty-acid-profiles-of-feedlot-heifers
#8
RANDOMIZED CONTROLLED TRIAL
C A Alvarado-Gilis, C C Aperce, K A Miller, C L Van Bibber-Krueger, S Uwituze, J S Drouillard, J J Higgins
Our objective was to evaluate whether feeding elevated Cu concentrations in conjunction with Linpro, a co-extruded blend of field peas and flaxseed, affected in vitro fermentation, performance, and plasma lipid profiles of fattening beef heifers. In study 1, 2 in vitro trials were conducted as randomized complete experiments with a 2×2 factorial treatment arrangement (10 or 100 mg/kg added Cu and 0 or 10% Linpro, DM basis) to determine VFA/gas production and IVDMD. Linpro contains 12% α-linolenic acid and added vitamins and minerals...
December 2014: Journal of Animal Science
https://www.readbyqxmd.com/read/25048096/growth-carcass-traits-and-palatability-can-the-influence-of-the-feeding-regimes-explain-the-variability-found-on-those-attributes-in-different-uruguayan-genotypes
#9
G Brito, R San Julián, A La Manna, M Del Campo, F Montossi, G Banchero, D Chalkling, J M Soares de Lima
It is well known what genetic and nutritional factors affect growth and meat quality, but there is less information related to interactive importance of them during the productive process. These systems are mainly based on rangelands affecting animal growth in early stages of life thus producing smaller cattle and reduced retail yield comparing with well grown calves. During the last ten years, Uruguayan livestock production systems have been intensified using improved pastures, concentrates and better genetic...
November 2014: Meat Science
https://www.readbyqxmd.com/read/25027797/the-relevance-of-methane-emissions-from-beef-production-and-the-challenges-of-the-argentinean-beef-production-platform
#10
D H Rearte, A J Pordomingo
The livestock sector faces the challenge to respond to the growing demand for animal protein from an expanding population while reducing environmental impact through GHG emissions. Globally about 2.836 million tons of CO2-eq were emitted by the beef production sector equivalent to 46,2 kg CO2-eq per kg carcass weight (CW). From the 1.485 million cattle head spread out over the world, 82% are on extensive grazing systems while only 18% are on high productive intensive systems. Among the top ten beef exporter countries, five are located in Latin America accounting a quarter of the global stock and two of them, Argentina and Uruguay, produce on temperate pastures under grazing systems...
November 2014: Meat Science
https://www.readbyqxmd.com/read/24342692/economic-values-of-production-and-functional-traits-including-residual-feed-intake-in-finnish-milk-production
#11
P Hietala, M Wolfová, J Wolf, J Kantanen, J Juga
Improving the feed efficiency of dairy cattle has a substantial effect on the economic efficiency and on the reduction of harmful environmental effects of dairy production through lower feeding costs and emissions from dairy farming. To assess the economic importance of feed efficiency in the breeding goal for dairy cattle, the economic values for the current breeding goal traits and the additional feed efficiency traits for Finnish Ayrshire cattle under production circumstances in 2011 were determined. The derivation of economic values was based on a bioeconomic model in which the profit of the production system was calculated, using the generated steady state herd structure...
February 2014: Journal of Dairy Science
https://www.readbyqxmd.com/read/24170364/beef-cattle-in-the-year-2050
#12
REVIEW
George E Seidel
In 2050, beef likely will be produced much as occurs currently, as (1) a by-product of dairying-cull cows and calves not needed as replacements; (2) intensively managed cattle in environments rich in feed resources; or (3) extensively managed cattle grazing land unsuitable for tillage, with calves often moving to richer feed environments. Genetic progress will continue to depend on information such as weaning weights, but in addition, genetic, epigenetic, and phenotypic information will be obtained from blood, hair, semen, and/or biopsies of embryos...
2014: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/22959940/low-protein-solid-feed-improves-the-utilization-of-milk-replacer-for-protein-gain-in-veal-calves
#13
H Berends, J J G C van den Borne, S J J Alferink, C G van Reenen, E A M Bokkers, W J J Gerrits
This study was designed to quantify the contribution of low-protein solid feed (SF) intake, in addition to milk replacer, to protein and energy retention in veal calves. Because of potential interactions between milk replacer and SF, occurring at either the level of digestion or postabsorption, this contribution might differ from that in calves fed either SF or milk replacer alone. Forty-eight Holstein Friesian male calves, 55±0.3 kg of body weight (BW), were divided across 16 groups of 3 calves each. Groups were assigned randomly to 1 of 4 incremental levels of SF intake: 0, 9, 18, or 27 g of DM of SF/kg of BW(0...
November 2012: Journal of Dairy Science
https://www.readbyqxmd.com/read/22145580/zen-and-the-art-of-breast-health-maintenance
#14
REVIEW
A Pazaiti, M Kontos, I S Fentiman
Zearalenone (ZEN) is a non-steroidal mycoestrogen that widely contaminates agricultural products. ZEN and its derivatives share similar molecular mechanisms and activity with estrogens and interact with ERα and ERβ leading to changes in the reproductive system in both animals and humans. The reduced form of ZEN, α-ZEA ralenol, has been used as an anabolic agent for animals and also proposed as hormonal replacement therapy in postmenopausal women. Furthermore, both zearelanol ZEN and derivatives have been patented as oral contraceptives...
January 2012: International Journal of Clinical Practice
https://www.readbyqxmd.com/read/21550730/fatty-acid-profile-and-oxidative-stability-of-the-perirenal-fat-of-bulls-fattened-on-grass-silage-and-maize-silage-supplemented-with-tannins-garlic-maca-and-lupines
#15
COMPARATIVE STUDY
S M Staerfl, C R Soliva, F Leiber, M Kreuzer
Carcass fat composition of cattle fed a forage-based diet might be inferior with maize silage compared to grass-silage based systems. This was quantified using complete diets with concentrate. To test whether supplements may influence carcass fat properties as well, the maize-silage diet was additionally supplemented either with Acacia mearnsii tannins, garlic, maca or lupines, feeds rich in secondary metabolites. The perirenal fat of 6×6 bulls fed these six diets was analysed for fatty acid profile and shelf life...
September 2011: Meat Science
https://www.readbyqxmd.com/read/19966157/effect-of-breed-body-size-and-the-muscular-hypertrophy-gene-in-the-production-and-carcass-traits-of-concentrate-finished-yearling-bulls
#16
A Martínez, N Aldai, R Celaya, K Osoro
To examine the extent of the effect of muscular hypertrophy character in beef of northern-Spanish breeds, animal performance and carcass characteristics of 152 finishing steers from 5 genotypes were studied: 32 yearling bulls from a rustic Asturiana de la Montaña (AM) breed, 96 yearling bulls from Asturiana de los Valles (AV) breed, divided in 3 groups depending on the presence of the gene responsible for double-muscling (i.e., 32 AV mh/mh, 32 AV mh/+, 32 AV +/+), and 24 yearling bulls from AM x AV cross were used...
April 2010: Journal of Animal Science
https://www.readbyqxmd.com/read/18073288/effect-of-rumen-degradable-protein-balance-deficit-on-voluntary-intake-microbial-protein-synthesis-and-nitrogen-metabolism-in-growing-double-muscled-belgian-blue-bulls-fed-corn-silage-based-diet
#17
D Valkeners, A Théwis, M Van Laere, Y Beckers
Two trials were conducted to evaluate the effect of rumen-degradable protein balance (OEB) deficit on voluntary intake (trial 1), microbial protein synthesis, and N metabolism (trial 2) in growing double-muscled Belgian Blue bulls. In trial 1, six bulls (339 +/- 26 kg of initial BW) were used in a replicated 3 x 3 Latin square and received a diet of 60% corn silage and 40% concentrate with ad libitum intake (DM basis). Three concentrates were formulated by adding urea at the expense of barley to give similar dietary contents of intestinal digestible proteins, NE for fattening, and fermentable OM, but with different levels of OEB...
March 2008: Journal of Animal Science
https://www.readbyqxmd.com/read/11811457/influence-of-free-choice-vs-mixed-ration-diets-on-food-intake-and-performance-of-fattening-calves
#18
S B Atwood, F D Provenza, R D Wiedmeier, R E Banner
Research findings and management recommendations typically emphasize responses of the "average" individual, yet more than half of the animals in a group may differ significantly from the mean regarding food preference and intake. The productivity of a herd may be adversely affected if animals differing from the mean are fed a uniform diet formulated to meet the needs of the "average" individual. We compared the intake and performance of beef calves offered a choice or no choice among foods. Diets consisted of ad libitum access to either a chopped, mixed ration of rolled barley (31...
December 2001: Journal of Animal Science
https://www.readbyqxmd.com/read/10786902/characterization-of-exogenous-testosterone-in-livestock-by-gas-chromatography-combustion-isotope-ratio-mass-spectrometry-influence-of-feeding-and-age
#19
V Ferchaud, B Le Bizec, F Monteau, F Andre
The detection of exogenous testosterone in bovine urine was investigated by using gas chromatography/combustion/isotope ratio mass spectrometry (GC/C/IRMS). The carbon isotopic ratio measurement of epitestosterone, etiocholanolone (testosterone metabolite) and DHEA (testosterone precursor) in female bovine urines after testosterone enanthate administration was carried out. An important modification in the 13C/12C ratio of testosterone metabolites was observed, such that significant differences between precursor and metabolites of testosterone occurred until three weeks after intramuscular administration of testosterone enanthate...
2000: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/9464906/different-periods-of-feed-restriction-before-compensatory-growth-in-belgian-blue-bulls-i-animal-performance-nitrogen-balance-meat-characteristics-and-fat-composition
#20
J L Hornick, C Van Eenaeme, A Clinquart, M Diez, L Istasse
Thirty double-muscled Belgian Blue bulls were maintained at a rate of gain of .5 kg/d during four periods of time, 115 (G2), 239 (G3), or 411 (G4) d (low growth period, LGP), before fattening (rapid growth period, RGP). Ten control animals (CG) were fed a diet rich in energy and protein. The G2, G3, and G4 were fed a diet low in energy and protein and the same diet as CG during RGP. Live weight was recorded biweekly, feed intake (FI) daily, and nitrogen balance at three times for each group. At the slaughterhouse, the 7, 8, and 9th ribs were removed to determine carcass composition, meat quality, and meat and fat composition...
January 1998: Journal of Animal Science
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