Abstract: To determine the amino acid digestibility of oil-extracted soybean, cotton and rape seeds, as well as that of rice grain, corn, rough rice bran, and defatted rice bran fed to pigs, a total of eight crossbred boars with an average initial weight of 27.2 kg±2.3 kg were equipped with simple T-shape cannula in their ileum, randomly divided into two groups, and fed with the same basal diet of soybean corn starch. The results showed that the average apparent amino acid digestibility of tested feedstuffs was basically in accordance with that of recently published data and China Feed Database. The apparent ileal amino acid digestibility was lower than the apparent fecal amino acid digestibility by 5%-8%, and the apparent amino acid digestibility of rice grain was 5% lower than that of corn. In rice-producing region, it’s more benefit to replace rice grain with rough rice bran and defatted rice bran to feed pigs.

Key words: NaCl stress, Malus spp., Mineral nutrients