The Effect of Dietary Energy and Protein on Carcass Composition with a Note on a Method for Estimating Carcass Composition

Summers, J. D.; Slinger, S. J.; Ashton, G. C.

doi:10.3382/ps.0440501

Cited by 84 publications

(37 citation statements)

References 8 publications

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“…However, the increased carcass fat does not necessarily account for all of the increase in weight gain, as die carcass protein level was the highest on the 60-percent sucrose diet as was the protein retention, while the carcass moisture content was high on die 40-percent sucrose diet (table III). Summers et al (15) found an inverse relationship be tween carcass moisture and fat content in chicks which is confirmed in 7 of the dietary groups in this study ( fig. 1).…”

Section: Discussionsupporting

confidence: 73%

Carcass Composition and Weight Gain Response of Rats Fed Various Carbohydrates at Two Dietary Levels of Carbohydrate and Protein

et al. 1974

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A study was made of weight gains and carcass compositions in response to dietary sucrose, glucose, fructose, and corn starch at two dietary levels (40 and 60 %). Protein in the diets was either minimally adequate (12 %) or in excess of the requirement (18 %). At both carbohydrate and protein levels, sucrose-fed rats showed significantly greater weight gains than those animals receiving the other carbohydrates. At the 40-percent level, corn starch-fed animals gained more weight than animals receiving either glucose or fructose. At the 60-percent level, animals presented with fructose gained less weight than animals receiving the other carbohydrates. The animals receiving sucrose at both dietary levels had more carcass fat than those receiving either glucose or corn starch, and more carcass fat than those receiving fructose at the 60-percent level. An inverse relationship existed between carcass fat and carcass protein when both were expressed as a percentage of carcass dry weight. The fructose diets had protein retention values intermediate to those seen on the other diets. Protein retention on the sucrose diets was at least as high or higher than that on the starch diets. The results are consistent with the concept that different dietary carbohydrates elicit differing metabolic responses as measured by both weight gains and carcass analyses.

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Section: Discussionsupporting

confidence: 73%

Carcass Composition and Weight Gain Response of Rats Fed Various Carbohydrates at Two Dietary Levels of Carbohydrate and Protein

et al. 1974

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“…모든 실험 사료는 육계 사료 제조 공 장에서 펠렛-익스팬더 가공사료로 육계 전기는 크럼블, 육계 Hill and Dansky(1954), Donaldson et al(1956), Summers et al(1965), Leeson et al (1996a, b), Hargis and Creger (1980) Leeson et al(1996b)이 보고한 결과와 마찬가지로 대사에너지 수준 간에 유의한 차이가 없 었다. 하지만 (Lumeiji, 1997).…”

Section: 실험 사료unclassified

Growth Performance and Carcass Characteristics of Two Different Broiler Strains by Different Levels of Metabolizable Energy

Kim¹,

Kwon²,

Kim³

et al. 2012

Korean Journal of Poultry Science

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The objective of this study was to evaluate the effects of different levels of dietary ME on growth performance and carcass characteristics in two different strains of broiler chicken. A total of one thousand, 1-day-old A strain and R strain male chicks were randomly assigned into 8 treatments in a 2×4 factorial arrangement. They were fed iso-nitrogenic (CP 21%) crumbled diets formulated to contain metabolizable energy (ME) 2,950 to 3,250 kcal/kg in increment of 100 kcal/kg in the starter phase (1 to 21d) and iso-nitrogenic (CP 19%) pelleted diets containing same ME levels as in the finishing phase (22 to 38d). The body weight (BW) gain of chicks fed the lower ME diets (2,950 or 3,050 kcal/kg) were higher than those of the higher ME groups. The dietary energy level showed significant effects on feed intake and feed conversion rate (FCR) from 1 to 38 days of age (p<0.05). With the increment of dietary energy, feed intake tended to be reduced, whereas FCR was improved in the two strains of broiler chickens. The lowest FCR was observed at 3,250 kcal/kg diet groups in both of the two strains from 1 to 38 days of age. Feed intake and BW gain during 38 days were significantly affected by the strain factor. Increasing dietary energy up to 3,250 kcal/kg had no effect on the relative weights of breast meat and abdominal fat. The dietary energy and strains showed significant effects on the dressing percentage. There were no significant differences in various blood profiles except for GPT activity.

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“…In isocaloric diets, if crude protein level is decreased, there is an increase in C:P ratio, which result in fatter carcasses (Summers et al, 1965;Griffiths et al, 1977;Rosebrough & Steele, 1985).…”

Section: Introductionmentioning

confidence: 99%

Effect of energy levels of diets formulated on total or digestible amino acid basis on broiler performance

Maiorka

Dahlke

Santín

et al. 2004

Rev. Bras. Cienc. Avic.

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This study was conducted to evaluate the performance and carcass and breast yields of broilers fed two different energy levels (3,200 or 2,900 kcal ME/kg) and two ways of expressing amino acid requirements (total TAA or digestible DAA) between 21 and 42 days of age. The results showed that broilers fed the diet containing 3,200 kcal ME/kg had higher weight gain (P=0.015), better feed conversion (P=0.001), and higher abdominal fat deposition (P=0.001) as compared to those fed the diet containing 2,900 kcal ME/kg. Diets formulated on DAA basis promoted higher weight gain (P=0.043), better feed conversion (P=0.010) and better conversion of ME intake into weight gain (P=0.007) as compared to those formulated on TAA basis. The results of this study suggest that formulation based on DAA is necessary if the diets contain protein sources that are not reliable in terms of amino acid digestibility. The response to formulation based on DAA was minimized when birds received the low energy level diet (2,900 kcal ME/kg).

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The Effect of Dietary Energy and Protein on Carcass Composition with a Note on a Method for Estimating Carcass Composition

Cited by 84 publications

References 8 publications

Carcass Composition and Weight Gain Response of Rats Fed Various Carbohydrates at Two Dietary Levels of Carbohydrate and Protein

Carcass Composition and Weight Gain Response of Rats Fed Various Carbohydrates at Two Dietary Levels of Carbohydrate and Protein

Growth Performance and Carcass Characteristics of Two Different Broiler Strains by Different Levels of Metabolizable Energy

Effect of energy levels of diets formulated on total or digestible amino acid basis on broiler performance

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