Gorgan University of Agricultural Sciences and Natural Resources Poultry Science Journal 2345-6604 14 1 2026 01 01 Effect of Different Feedstuffs on the Gastrointestinal Transit Time of 18-wk-old Magang Geese 101 107 7409 10.22069/psj.2025.23750.2341 EN Yueliang Xie Guangdong Agriculture Industry Business Polytechnic, Guangzhou, China Rongxi Li Guangdong Agriculture Industry Business Polytechnic, Guangzhou, China Xiaohua Yao Guangdong Agriculture Industry Business Polytechnic, Guangzhou, China Bin Peng Guangzhou Huashang Vocational College, Guangzhou, 510000, China Wen Liu Guangdong Agriculture Industry Business Polytechnic, Guangzhou, China Journal Article 2025 06 04 Accurate gastrointestinal transit time was essential to the digestibility determination tests. However, the effects of different feedstuffs on intestinal transit time remain unclear. The aim of this study was to investigate the effect of different feedstuffs on the gastrointestinal transit time of 18-wk-old geese. A total of 80 male Magang geese of 18 weeks old were weighed individually and randomly divided into 10 groups with eight geese per group. Ten treatment groups were fed corn, sorghum, wheat, soybean meal, cottonseed meal, rapeseed meal, 25% rice bran and hulls (RBH), 50% RBH, 75% RBH, and 100% RBH, respectively. Fresh excreta samples were collected and weighed from each pen every 6 h during the next 48 h after being tube-fed. Excreta weight increased significantly during the first 24 h after tube-feeding of all feedstuffs (P < 0.05). From 24 to 48 h, no significant changes were observed in excreta weight following tube-feeding of cereal or protein source feedstuffs (P > 0.05). In contrast, birds tube-fed diets containing 25% to 100% RBH showed a progressive increase in excreta weight from 24 to 36 h post–post-tube-feeding, after which excreta output remained stable. No significant changes in TiO₂ recovery were observed in excreta following tube-feeding of cereal or protein source feedstuffs from 24 to 48 h, whereas birds tube-fed diets containing different levels of RBH showed an increase in TiO₂ recovery from 24 to 36 h, which then remained stable. In conclusion, for Magang geese, the optimal gastrointestinal transit time was 24 h for cereal and protein source feedstuffs, in which diets with different fiber contents require a relatively prolonged period of 24-36 h. https://psj.gau.ac.ir/article_7409_8e5859c21d695491474793ef16a4fbda.pdf