Yang Pei, Su Xiaoyan, Li Bin, Jin Junqi, Yu Bing, He Jun, Yu Jie, Wang Quyuan, Wang Huifen, Chen Daiwen, Yan Hui
Key Laboratory for Animal Disease-Resistance Nutrition of Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu 611130, China.
Sichuan Tequ Agriculture and Animal Husbandry Technology Group Co., Ltd., Chengdu 610207, China.
Animals (Basel). 2025 Jun 24;15(13):1872. doi: 10.3390/ani15131872.
The apparent ileal digestibility (AID) and standardized ileal digestibility (SID) of amino acids, digestible energy (DE), metabolizable energy (ME), and the apparent total tract digestibility (ATTD) of nutrients in 10 fishmeal (FM) samples were evaluated in weaned barrows (Duroc × Landrace × Yorkshire) using two experiments. In Experiment 1, 11 piglets (18.87 ± 0.10 kg) fitted with T-cannulas were randomly allocated to an 11 × 6 Latin-square design with 11 diets (1 nitrogen-free diet and 10 assay diets) and six periods. The AID and SID of all amino acids (AAs) except proline showed significant differences among all FM ( < 0.05). Importantly, the SID of amino acids was positively correlated with key antioxidant markers and immune parameters, and it was negatively correlated with oxidative stress markers (MDA) and pro-inflammatory cytokines (IL-2 and IL-6). In Experiment 2, 11 piglets (18.05 ± 1.15 kg) were assigned to an 11 × 5 Latin-square design with 11 diets (a 96.35% corn diet and 10 assay diets) and five consecutive periods. Significant variations were observed in the DE, ME, and ATTD of dry matter among different FM samples ( < 0.05). Moreover, predictive equations for estimating the SID of lysine, methionine, threonine, and tryptophan, as well as DE and ME, were established using stepwise regression analysis based on the chemical composition of the FM. These findings demonstrate that the nutritional value of FM in nursery pig diets has been underestimated, and this study provides precise data and predictive methods for evaluating the nutritional quality of FM in precision nutrition.
通过两项试验，评估了10种鱼粉（FM）样品中氨基酸的表观回肠消化率（AID）和标准回肠消化率（SID）、消化能（DE）、代谢能（ME）以及断奶仔猪（杜洛克×长白×约克夏）营养物质的表观全肠道消化率（ATTD）。在试验1中，将11头安装了T型套管的仔猪（18.87±0.10千克）随机分配到一个11×6拉丁方设计中，有11种日粮（1种无氮日粮和10种测定日粮）和6个时期。除脯氨酸外，所有氨基酸（AA）的AID和SID在所有鱼粉之间均显示出显著差异（P<0.05）。重要的是，氨基酸的SID与关键抗氧化指标和免疫参数呈正相关，与氧化应激指标（丙二醛）和促炎细胞因子（白细胞介素-2和白细胞介素-6）呈负相关。在试验2中，将11头仔猪（18.05±1.15千克）分配到一个11×5拉丁方设计中，有11种日粮（一种96.35%玉米日粮和10种测定日粮）和5个连续时期。不同鱼粉样品之间干物质的DE、ME和ATTD存在显著差异（P<0.05）。此外，基于鱼粉的化学成分，通过逐步回归分析建立了估算赖氨酸、蛋氨酸、苏氨酸和色氨酸的SID以及DE和ME的预测方程。这些结果表明，仔猪日粮中鱼粉的营养价值被低估了，本研究为精准营养中评估鱼粉营养质量提供了精确数据和预测方法。
