Four assays werecarried out to determine the apparent metabolizable energy (AME) and nitrogencorrected apparent metabolizable energy (AMEn) of ten feedstuffs of vegetableorigin for poultry at different ages. The chemical composition of the ten feedstuffswas also determined: 45% soybean meal, 48% soybean meal, extruded full-fat soybean,deactivated full-fat soybean, micronized full-fat soybean, deactivated soybeanmeal, soybean protein concentrate, corn gluten meal 21%, corn germ and brokenrice. The method of total excreta collection was used and a randomized completeexperimental design was used with 11 treatments and six replications, in thefour assays. In the 1st, 2nd and 3rd assaysbroiler chicks were used aged 10 to 17, 26 to 33 and 40 to 47 days, respectively,and in the 4th assay roosters were used with 25 weeks of age. TheAMEn values (as-fed basis) determined in the 1st, 2nd,3rd and 4th assay were, respectively: 2069, 2148, 2272and 2231 for 45% soybean meal; 2214, 2225, 2319 and 2247 for 48% soybean meal;3322, 3331, 3405 and 3493 for extruded full-fat soybean; 3016, 3067, 3139 and3388 for deactivated full-fat soybean; 3557, 3638, 3828 and 3869 for micronizedfull-fat soybean; 2292, 2348, 2518 and 2502 for deactivated soybean meal; 2356,2399, 2509 and 2486 for soybean protein concentrate; 1826, 1882, 2110 and 1942for corn gluten meal 21%; 2605, 2764, 2925 and 2832 for corn germ; and 2967,3029, 3096 and 3026 for broken rice.
