Evaluating poultry feedstuffs in terms of their metabolizable energy content and chemical composition

Abstract

The metabolizable energy values (ME) of 16 feed ingredients available in Australia were determined with broiler chicks of both sexes. The chickens were fed test diets in which the feed ingredients replaced dextrose in a basal diet.The mean coefficient of variation was low in each determination of ME (range 0.78 to 1.20, mean 0.94 per cent). Sex had no significant effect on the ME value of most feedstuffs with the exception of oats, where ME values were significantly higher for female than for male chicks (P < 0.05).

Measurement of Bioavailable Energy in Poultry Feedingstuffs: A Review

“…Farrell (19'15) reported between breed differences in heat production and AME utilization for tissue synthesis; differences in daily maintenance energy requirements (AMETokg body wt) among broiler lines were reported by Pym and Farrell (1917). Differences in optimal calorie:protein ratios between strains of White Leghorn hens were identified by Liljedahl et al (1913) (Guirguis 1975). Interactions between sex, fat and fish meal were reported to affect AME values but the reason is obscure (Guirguis l976a,b).…”

“…Titus (1958) extended and refined the work of Fraps et al (1940) by deriving a series of 'percentage multipliers' which permit calculation of the AME values of individual f'eedingstuffs. Opstvedt (1973) (Opstvedt 1976 (Janssen and Terpstra 1972;Jannsen et al 1975Jannsen et al , 1976Janssen 1916Janssen , 1919 (Connor et al 1976) and oats (Davidson et al 1978 Carpenter and Clegg (1956), Bolton (1962b) and Sibbald et al (1963) whereas the equations ofTitus (1958) produced reasonably accurate data (Guirguis 1975 Coates et al 1911a). No equation was able to give satisfactory TME values for wheats but the TME values of oats (Sibbald and Prtce l9lla) and barley (Sibbald and Price 1916b) were well predicted by some equations.…”

Energy evaluation of protein sources for young swine

“…Young et al (1977), experimenting with pigs, reported a ME value of 2.17 kcal/g dry matter for meat and bone meal. Potter and Matterson (1960) in chicks trials reported ME value of 1.98 kcal/g dry matter, while Guirguis (1975) observed that ME of meat and bone meal averaged 2.55 kcal/g matter.…”

“…meal from different sources in experiments with chicks and observed ME values ranging from 2.0 to 3.05 kcal/g dry matter. However, Guirguis (1975) reported a value of 3.52 kcal/g dry matter as the ME of peanut meal fed to chicks. Young et (1977), discussing the discrepancy in the range of values reported for DE of soybean meal, attributed the range in reported values to Also, the peanut meal used in this study was mechanically extracted, and as Lodhi et (1976) observed, ME content of peanut cake derived from single-phase extraction was higher than that of four phase extraction.…”

“…Diggs et (1965) and Saben et (1971a, b) Level of protein has profound effect upon the utilization of DE and the ME:DE ratios. Lower values were observed for ME of high protein feeds when the level of the ingredient in the diet was high in the ration or when the protein level of the basal ration was high (May and Bell, 1971 Some investigators (Hill and Renner, 1960;Saben et al, 1971b;Guirguis, 1975Guirguis, , 1976Lodhi et , 1976) have fed diets in which the pro tein source being evaluated was combined with several other protein sources in the basal diet. Associative effects on energy utilization were assumed to be negligible.…”