Metabolisable energy value of fats in chicks and adult cockerels

Lessire, Michel; Leclercq, B.; Conan, L.

doi:10.1016/0377-8401(82)90006-2

Cited by 45 publications

(20 citation statements)

References 9 publications

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“…From 4 weeks onward, however, no consistent differences between the ME of tallow and A-V Fat were observed. As with the fat retention data, the changes in ME of fats associated with increasing age agree with ME data obtained previously with chicks (Renner and Hill, 1960;Lessire et al, 1982) and with absorbability data for turkeys presented by Whitehead and Fisher (1975) and Salmon (1977).…”

Section: Resultssupporting

confidence: 88%

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Influence of Age on Utilization of Supplemental Fats by Young Turkeys

1986

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Male poults were fed diets containing 0, 4, 8, or 12% tallow or 4, 8, or 12% animal-vegetable fat blend (A-V Fat) from 1 day to 8 weeks of age. Supplemental fat improved 8-week body weight and feed efficiency, irrespective of fat source. Fat retention (fat consumed-fat excreted) was not affected by fat level or by fat source after 2 weeks of age. At 2 weeks, fat retention by poults fed tallow was less than that of poults fed A-V Fat. Fat retention increased with age, irrespective of fat source or level. Fat retentions ranged from 66.4 to 83.7 at 2 weeks and from 90.8 to 96.5 at 8 weeks of age. Changes in metabolizable energy (ME) values of the fats with age paralleled those of fat retention, whether ME were estimated by multiplying fat retention percentages times gross energy of the fats or by regression analysis of changes in diet ME associated with increments of fats. On the basis of changes in diet ME, the ME of tallow was 6808 kcal/kg at 2 weeks and 8551 kcal/kg at 8 weeks. Analagous values for A-V Fat were 7114 and 8924 kcal/kg, respectively. Fatty acid analysis of dietary and excreta fat indicated that, as turkeys aged, improvements in retention were greatest for palmitic and stearic acids, especially in the instance of tallow. Fatty acid binding protein (FABP) assay of intestines from poults fed no added fat, 12% tallow, or 12% A-V Fat showed that fat level did not significantly affect FABP activity. There was, however, a marked increase in intestinal FABP in 6- and 8-week-old poults as compared with 2- or 4-week-old poults.

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Section: Resultssupporting

confidence: 88%

“…Concurrent with this improvement, an increase was detected in fatty acid binding protein (FABP) activity in the small intestine of broiler chicks. Also working with chicks, Polin and Hussein (1982) and Lessire et al (1982) demonstrated an increase in fat utilization with increasing age.…”

Section: Introductionmentioning

confidence: 95%

Influence of Age on Utilization of Supplemental Fats by Young Turkeys

1986

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“…The mean gross energy (GE) content was 4,573 kcal/ kg of DM, and ranged from 4,458 to 4,664 kcal/kg of DM, which was similar to that in a previous study by Lessire et al (2003). The mean CP content was 103 g/kg of DM with a range from 85 to 130 g/kg of DM.…”

Section: Resultssupporting

confidence: 64%

“…To produce an accurate evaluation of the ME content of corn for poultry diet formulation, a considerable number of studies have been conducted to predict the ME content of corn based on its physical characteristics or chemical composition. Using the adult rooster as a test animal, many researchers have shown that the ME content of corn was correlated with its bulk density or chemical composition (Conner et al, 1976;Leeson et al, 1977;Mollah and Annison, 1981;Dale, 1994;NRC, 1994;Lessire et al, 2003). These results also indicated that the ME value of corn could be predicted, but few studies have been reported with ducks.…”

Section: Introductionmentioning

confidence: 67%

“…One such factor is the sample size for regression analysis; another is the representativeness of samples for the feedstuff as a whole. In some experiments aimed at predicting the ME content of raw materials, more than 25 samples were included in the regression analysis (Dale, 1994;Lessire et al, 2003). However, in other studies, the number of samples was less than 15 (Mollah and Annison, 1981).…”

Section: Introductionmentioning

confidence: 99%

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Predicting Metabolizable Energy of Normal Corn from its Chemical Composition in Adult Pekin Ducks

Zhang

Hou

et al. 2008

Poultry Science

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Two experiments were conducted to establish an ME content prediction model for normal corn for ducks based on the grain's chemical composition. In Experiment 1, observed linear relationships between the determined ME content of 30 corn calibration samples and proximate nutrients, acid detergent fiber (ADF), and neutral detergent fiber (NDF) were used to develop an ME prediction model. In Experiment 2, 6 samples of corn selected at random from the primary corn-growing regions of China were used for testing the accuracy of ME prediction models. The results indicated that the AME, AME(n), TME, and TME(n) were negatively correlated with crude fiber (r = -0.905), ADF (r = -0.915), and NDF (r = -0.95) contents, and moderately correlated with gross energy (GE; r = -0.55) content in corn calibration samples. In contrast, no significant correlations were found for CP, ether extract, and ash contents. According to the stepwise regression analysis, both NDF and GE were found to be useful for the ME prediction models. Because the maximum absolute difference between the in vivo ME determinations and the predicted ME values was 61 kcal/kg, it was concluded that, for White Pekin ducks, the latter could be used to predict the ME content of corn with acceptable accuracy.

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The nutritional value for broilers of fats characterized by short-chain fatty acids as affected by level of inclusion and age

Ketels

Groote

1988

Animal Feed Science and Technology

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Metabolisable energy value of fats in chicks and adult cockerels

Cited by 45 publications

References 9 publications

Influence of Age on Utilization of Supplemental Fats by Young Turkeys

Influence of Age on Utilization of Supplemental Fats by Young Turkeys

Predicting Metabolizable Energy of Normal Corn from its Chemical Composition in Adult Pekin Ducks

The nutritional value for broilers of fats characterized by short-chain fatty acids as affected by level of inclusion and age

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