The Effect of Level of Concentrate in Feedlot Diets on Growth, Health and Carcass Characteristics of Bulls

Makarechian, M.; Arthur, P. F.; Liu, M. F.; Okine, E. K.

doi:10.1080/09712119.1995.9706050

Cited by 4 publications

(2 citation statements)

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“…Growth intensity in the investigated animals of Holstein × Czech Pied breed was practically consistent with the authors who studied the use of high-grain diets in crossbred beef bulls. For instance Makarechian et al (1995) detected the daily weight gain of 1.8 kg in bulls fed concentrates ad libitum up to the weight of 600 kg, whereas bulls fed the same type of diet with a higher proportion of hay had the daily weight gain of 1.3 kg. In the study by Fluharty et al (2000), Angus crossbred steers reared in the pasture which was followed by intensive feeding a concentrated diet produced a high average daily weight gain of about 1.7 kg provided the feed was available ad libitum.…”

Section: Discussionmentioning

confidence: 99%

“…Most authors who used concentrated diets for fattened cattle registered markedly increased daily weight gain during grain feeding in comparison with fodder-based fattening (Keane and Fallon, 2001;Makarechian et al, 1995;Fluharty et al, 2000;Schoonmaker et al, 2003). However, many authors pointed out the risk of acidogenic effect of highly concentrated diets produced by a high content of starch and a low content of structural fibre.…”

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Effect of intensive fattening of bulls based on a high-grain diet on growth intensity and biochemical and acid-base parameters of blood

Pazout¹,

Straková²,

Suchý³

et al. 2005

CZECH J ANIM SCI

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ABSTRACT:The present study deals with the use of high-grain diets with a low proportion of fodder for fattened cattle, and with the evaluation of their effect on the growth intensity and metabolic profile of the animals. Thirty Holstein × Czech Pied bulls were given diets containing from 86.69 to 88.54% concentrates based on crushed cereals in the period from 216 th to 327 th day of age. The growth intensity of bulls was high, with the average daily weight gain of 1.64 kg in the course of the whole experiment. When the average body weight of animals reached 343.67 kg and 450.93 kg, blood samples were taken from the vena jugularis of 10 randomly selected animals for the assessment of acid-base balance and selected biochemical parameters. Slightly decreased pH values and increased pCO 2 were detected by the assessment of acid-base balance. The calculated values of base excess and standard bicarbonate were in the reference range; however in samples of the second collection a highly significant decrease was found (P ≤ 0.01). By a biochemical analysis of blood increased levels of plasma phosphorus were detected in samples of both collections in comparison with the accepted reference range. A statistically highly significant increase (P ≤ 0.01) in plasma urea concentrations was detected in samples of the second collection. Other investigated parameters ranged within the accepted reference values. The results of the experiments show that high-grain diets produced intensive growth with high daily weight gains, without adverse effects on the health status of the investigated bulls. Although some depletion of compensatory mechanisms maintaining the acid-base balance was recorded, no serious disturbance of metabolic profile was registered in the animals.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

Effect of intensive fattening of bulls based on a high-grain diet on growth intensity and biochemical and acid-base parameters of blood

Pazout¹,

Straková²,

Suchý³

et al. 2005

CZECH J ANIM SCI

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Factors Influencing Ultrasound Estimates of Carcass Traits and their Relationships with Body Weight, Gain, Scrotal Circumference and Hip height in Feedlot Bulls

Morsy

Makarechian

El-Feel

et al. 1998

Journal of Applied Animal Research

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Morsy, N.H.A., Makrechian, M., El-Feel, F.M.R. and Hassan, H.A. 1998. Factors influencing ultrasound estimates of carcass traits and their relationships with body weight, gain, scrotal circumference and hip height in feedlot bulls. J. Appl. Anim. Res., 14: 159-170. Body weight (WT), scrotal circumference (SC), hip height (HHT) and ultrasound estimates of backfat thickness (Bn, lean meat yield (LIMY) and rib eye area (REA) were recorded in 64 bulls from two synthetic breed groups. The bulls were fed either a high concentrate (85% grain) or low concentrate (55% grain) diet. WT, SC, HHT, BE LMY and REA were recorded on days 100, 128 and 156 of feedlot test. Thedata were analyzed by general linear model analysis of variance to study the effects of energy level, breed group and their interaction on ultrasound estimates of BF, REA and LMY and their changes in feedlot test. Stepwise regression analysis considering the sepamte effects of each diet and breed group was applied to study the relative influences of final WT, SC and HHT on variation in the ultrasound estimates. The results indicated that HHT did not have any significant association with the carcass traits. Breed group and level of energy did not have %'o whom correspondence should be addressed.

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A study on the variation of feed efficiency in station tested beef bulls

Liu¹,

Goonewardene²,

Bailey³

et al. 2000

Can. J. Anim. Sci.

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2000. A study on the variation of feed efficiency in station tested bulls. Can. J. Anim. Sci. 80: [435][436][437][438][439][440][441]. The records of 282 young beef bulls from eight breeds tested from November 1981 to April 1987 at the Ellerslie Bull Test Station, Alberta, Canada, were used to study the variation in feed efficiency among young performance-tested bulls. Considerable variation existed among the animals in both residual metabolizable energy consumption and residual dry matter consumption. The heritability estimates for residual metabolizable energy consumption and residual dry matter consumption were 0.33 and 0.29, respectively. In addition, residual metabolizable energy consumption and residual dry matter consumption were moderately correlated (r = 0.43) with conventional feed-to-gain ratio, indicating that conventional feed-to-gain ratio only accounted for 18% of the variation in residual metabolizable energy consumption or residual dry matter consumption. It was, therefore, worthwhile to use residual metabolizable energy consumption or residual dry matter consumption as separate measures of feed efficiency. For rapid improvement in feed efficiency in beef cattle, selection pressure should be applied to both growth traits and residual energy consumption or residual dry matter consumption. Multi-trait optimum restricted selection indices and similar selection procedures may serve as useful means in balanced selection programs to improve the productivity of beef cattle.Key words: Feed efficiency, residual ME consumption, beef bulls Liu, M. F., Goonewardene, L. A., Bailey, D. R. C., Basarab, J. A., Kemp, R. A., Arthur, P. F., Okine, E. K. et Makarechian, M. 2000. Étude de la variabilité de l'efficacité alimentaire chez les taureaux à viande testés en station. Can. J. Anim. Sci. 80: 435-441. Les fiches de 282 taurillons de 8 races de type à viande testés de novembre 1981 à avril 1987 à la station d'Ellerslie (Alberta) ont servi à un examen de la variation de l'efficacité alimentaire manifestée parmi les taurillons. Nous avons ainsi pu observer un degré élevé de variation de la consommation résiduelle, à la fois d'énergie métabolisable et de matière sèche parmi les animaux. Les valeurs d'héritabilité pour les deux caractères étaient respectivement, de 0,33 et 0,29. En outre, les deux caractères affichaient une corrélation modérée (r = 0,43) avec l'indice de consommation classique, démontrant que ces derniers indices ne prenaient en compte que 18 % seulement de la variation affectant les deux facteurs de consommation résiduelle. Il vaut donc la peine d'utiliser l'un ou l'autre de ces facteurs séparément comme mesure de l'efficacité alimentaire. Si l'on veut améliorer rapidement l'efficacité alimentaire chez les bovins à viande, la sélection devrait porter à la fois sur les caractères de croissance et sur la consommation résiduelle d'énergie ou celle de matière sèche. Les indices composites de sélection restreinte optimale ou de techniques de sélection du même genre seraient des outils utiles dans les p...

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The Effect of Level of Concentrate in Feedlot Diets on Growth, Health and Carcass Characteristics of Bulls

Abstract: AbstractsMakarechian, M., Arthur, P.F., Liu, M.F. and Okine, E.K. 1995

Cited by 4 publications

References 6 publications

Effect of intensive fattening of bulls based on a high-grain diet on growth intensity and biochemical and acid-base parameters of blood

Effect of intensive fattening of bulls based on a high-grain diet on growth intensity and biochemical and acid-base parameters of blood

Factors Influencing Ultrasound Estimates of Carcass Traits and their Relationships with Body Weight, Gain, Scrotal Circumference and Hip height in Feedlot Bulls

A study on the variation of feed efficiency in station tested beef bulls

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