The present study was conducted to assess the effect of a microencapsulated mixture of organic acids (MOAs) supplementation on the growth performance, nutrient digestibility, blood profile, fecal gas emission, fecal microbial, and meat-carcass grade quality in growing-finishing pigs. A total of 90 crossbred pigs (Duroc × Landrace × Yorkshire) with mean initial body weight (BW) of 22.68 ± 0.01 kg were used in a 16-week experiment. Pigs were randomly distributed to one of 3 treatment and 6 replicate pens per treatment 5 pigs per pen. The dietary treatments were as follows: control, basal diet; MOAs1, basal diet + 0.05% MOAs; and MOAs2, basal diet + 0.10% MOAs, respectively).The supplementation of MOAs in the basal diet has significant (P< 0.05) linearly improvement in body weight gain (BWG) at week 8, 12, and 16 and average daily gain (ADG) at weeks 4, 8, 12 and the overall experiment. In addition, MOAs supplementation had linearly (P< 0.05) decreased fecal Escherichia coli (E. coli) counts in pigs at week 16. The inclusion of MOAs in pigs’ diet had linearly (P< 0.05) increased in backfat thickness (BFT) and lean meat percentage (LMT) at week 4. The drip loss decreased linearly (P < 0.05) on day 7 supplemented with a graded level of MOAs. Dietary supplementation of MOAs failed to show significant effects on nutrient digestibility, blood profile and fecal gas emission. Thus, MOAs supplementation had positively enhanced the growth performance, fecal microbial, and meat quality of growing-finishing pigs.

本研究旨在评估添加有机酸 (MOA) 的微胶囊混合物对生长育肥猪的生长性能、营养消化率、血液成分、粪便气体排放、粪便微生物和肉胴体等级质量的影响。在为期 16 周的实验中，总共使用了 90 头杂交猪（杜洛克 × 长白 × 约克夏），平均初始体重 (BW) 为 22.68 ± 0.01 kg。将猪随机分配到 3 个处理中的一个，每个处理 6 个重复栏，每栏 5 头猪。饮食处理如下：对照、基础饮食；MOA1，基础饮食 + 0.05% MOA；和 MOA2，分别为基础日粮 + 0.10% MOA。基础日粮中 MOA 的添加具有显着性（P< 0.05) 第 8、12 和 16 周的体重增加 (BWG) 和第 4、8、12 周和整个实验的平均每日增加 (ADG) 呈线性改善。此外，在第 16 周时，MOA 的添加呈线性（P < 0.05）降低猪的粪便大肠杆菌（E.coli）计数。在猪的饮食中添加 MOA 呈线性（P< 0.05) 在第 4 周时背膘厚度 (BFT) 和瘦肉百分比 (LMT) 增加。滴水损失在第 7 天呈线性下降 (P < 0.05)，并辅以分级水平的 MOA。MOA 的膳食补充剂未能对营养物质的消化率、血液成分和粪便气体排放量产生显着影响。因此，添加 MOA 对生长育肥猪的生长性能、粪便微生物和肉质有积极的提高。