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Additivity of apparent and true ileal amino acid digestibilities in soybean meal, sunflower meal, and meat and bone meal for broilers. 1996

K Angkanaporn, and V Ravindran, and W L Bryden
Department of Animal Science, University of Sydney, Camden, Australia.

An experiment was conducted to determine the additivity of apparent and true ileal amino acid digestibility values in soybean meal (SBM), sunflower meal (SFM), and meat and bone meal (MBM). A total of 63 individually caged 5-wk-old broilers were assigned to seven groups and given semi-purified diets containing SBM, SFM, MBM, and their combinations. True digestibilities were estimated by using the homoarginine in guanidinated proteins as the marker. Additivity was tested by comparing the differences between the observed digestibilities of ingredient combinations and the predicted values from measurements with individual ingredients. In general, for both apparent and true digestibilities, there were no significant differences (P > 0.05) between the observed and predicted values in ingredient combinations. The only exception was SBM + MBM combination, in which the observed values for apparent digestibilities of aspartic acid, serine, glutamic acid, isoleucine, and tyrosine were significantly higher (P < 0.05) than the predicted values. Overall, the present results indicate that amino acid digestibility values are additive and that digestible amino acid supply in a complete diet can be predicted from amino acid digestibilities of individual ingredients.

UI MeSH Term Description Entries
D007082 Ileum The distal and narrowest portion of the SMALL INTESTINE, between the JEJUNUM and the ILEOCECAL VALVE of the LARGE INTESTINE.
D007532 Isoleucine An essential branched-chain aliphatic amino acid found in many proteins. It is an isomer of LEUCINE. It is important in hemoglobin synthesis and regulation of blood sugar and energy levels. Alloisoleucine,Isoleucine, L-Isomer,L-Isoleucine,Isoleucine, L Isomer,L-Isomer Isoleucine
D008460 Meat The edible portions of any animal used for food including cattle, swine, goats/sheep, poultry, fish, shellfish, and game. Meats
D008903 Minerals Native, inorganic or fossilized organic substances having a definite chemical composition and formed by inorganic reactions. They may occur as individual crystals or may be disseminated in some other mineral or rock. (Grant & Hackh's Chemical Dictionary, 5th ed; McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed) Mineral
D011237 Predictive Value of Tests In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test. Negative Predictive Value,Positive Predictive Value,Predictive Value Of Test,Predictive Values Of Tests,Negative Predictive Values,Positive Predictive Values,Predictive Value, Negative,Predictive Value, Positive
D002645 Chickens Common name for the species Gallus gallus, the domestic fowl, in the family Phasianidae, order GALLIFORMES. It is descended from the red jungle fowl of SOUTHEAST ASIA. Gallus gallus,Gallus domesticus,Gallus gallus domesticus,Chicken
D004063 Digestion The process of breakdown of food for metabolism and use by the body.
D005260 Female Females
D006368 Helianthus A genus herbs of the Asteraceae family. The SEEDS yield oil and are used as food and animal feed; the roots of Helianthus tuberosum (Jerusalem artichoke) are edible. Jerusalem Artichoke,Sunflower,Helianthus annuus,Helianthus tuberosus,Artichoke, Jerusalem,Sunflowers
D006709 Homoarginine

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