Abstract: In order to study the standardized ileal amino acid digestibility （SIAAD） of common protein feed ingredients including soybean meal, rapeseed meal and DDGS in Wanxi white goose, a total of 288 56-day-old Wanxi white geese of similar weight were selected and randomly divided into 24 feeding pens with 12 geese for each feeding pen （6 males and 6 females）. The whole test period was 35 d, 0-28 d was the pre-feeding period, all geese were fed with the same basal diet; 29-35 d was the test period, the geese were fed separately with the testing diets and nitrogen-free feed for 6 days, and there were 6 feeding pens for each diet. The ileal chyme of each goose was collected before feeding on the 35^th day, and the amino acid content in the chyme was determined. The results showed that the average SIAAD of soybean meal, rapeseed meal and DDGS were 88.30%, 81.17% and 88.99%, respectively, and the average SIAAD of soybean meal and DDGS were significantly （P<0.05） higher than that of rapeseed meal. The SIAAD of soybean meal were as follows:lysine （Lys） 81.27%, methionine （Met） 95.14%, threonine （Thr） 85.08%, valine （Val） 88.25%, leucine （Leu） 88.20%, ileucine （Ile） 87.33%, phenylalanine （Phe） 91.66%, histidine （His） 87.77% and arginine （Arg） 92.18%; the SIAAD of rapeseed meal were as follows: Lys 75.19%, Met 87.87%, Thr 82.96% , Val 84.25%, Leu 83.19%, Ile 81.94%, Phe 86.08%, His 84.39% and Arg 83.10%; the SIAAD of DDGS were as follows: Lys 83.74%, Met 94.59%, Thr 90.85%, Val 91.97%, Leu 93.67%, Ile 91.38%, Phe 94.73%, His 90.59% and Arg 94.09%. The results of this experiment provide reference for the efficient utilization of soybean meal, rapeseed meal and DDGS in the diet of Wanxi white goose and reasonable preparation of low-nitrogen diet.

Key words: Wanxi white goose, soybean meal, rapeseed meal, DDGS, amino acid, standardized ileal digestibility