Gestating sows exhibit greater ileal amino acid digestibility of corn distillers grains, rapeseed meal, and cottonseed meal than growing pigs, but not soybean meal

作者：Bo Lei, Gang Lv, Xinxin Mo, L. Hua, Xiaoyu Jiang, Bin Feng, Lianqiang Che, Shengyu Xu, Y. Lin, Fuzhong Wu, De Wu, Yong Zhuo · 发表于：animal · 年份：2025 · DOI：10.1016/j.animal.2025.101556 · 被引用次数：3 · 研究领域：Animal Nutrition and Physiology、Animal Behavior and Welfare Studies、Effects of Environmental Stressors on Livestock

Precise measurement of ileal amino acid digestibility in feed ingredients is vital for optimising sows' nutrient requirements and feed utilisation. We hypothesised that the ileal amino acid digestibility of feed ingredients for swine, which usually are determined in growing pigs, may not accurately reflect their actual digestibility in gestating sows. This experiment aimed to compare the apparent and standardised ileal CP and amino acid (AA) digestibility of four protein-feed ingredients, including soybean meal, corn distiller' dried grains with solubles (DDGS), rapeseed meal (RSM), and cottonseed meal (CSM), between gestating sows and growing pigs. These feed ingredients were used as the sole sources of CP and AA to formulate four experimental diets for both gestating sows and growing pigs. Two nitrogen-free diets were formulated to estimate the endogenous AA losses for gestating sows and growing pigs, respectively. Ten barrows, with an average weight of 35.0 ± 1.6 kg, were randomly assigned to five treatments in a replicated 5 × 4 incomplete Latin square design (five diets and four periods) with eight replicates. For the sow trial, ten gestating sows, with an average weight of 238.9 ± 9.3 kg, were randomly assigned to five diets in a replicated 5 × 3 incomplete Latin square design (five diets and three periods) with six replicates. Each diet was fed for 7 days: 5 days for adaptation, with ileal digesta collected after the first meal on days six and seven. There were no diff...