Process / pipelineDigestibility Assessment
Apparent Total Tract Digestibility
Apparent Total Tract Digestibility (ATTD) is a measure of the proportion of a nutrient consumed in feed that is absorbed by the animal, calculated from the difference between dietary intake and fecal excretion. Standardized since the 1970s, ATTD is essential for quantifying the bioavailability of nutrients in feedstuffs, formulating balanced diets, and comparing the nutritive value of different feed ingredients across diverse animal species.
Open in MethodMindSoonVideoSoon
Read the full method
Members only
Sign inSign in with a free account to read this section.
Sources
- Adeola, O. (2001). Digestion and balance techniques in pigs. In A. J. Lewis & L. L. Southern (Eds.), Swine Nutrition (2nd ed., pp. 903-916). CRC Press. link ↗
- Zijlstra, R. T., & Beltranena, E. (2013). Swine convert co-products from food and biofuel industries efficiently to protein for human food. Journal of Animal Science, 91(5), 2286-2296. DOI: 10.2527/jas.2012-5954 ↗
- National Research Council (2012). Nutrient Requirements of Swine (11th ed.). National Academies Press. link ↗