ABSTRACT This experiment was conducted to determine effects of dietary supplementation with coated omega-3 fatty acids (n-3FA) on growth performance, nutrients digestibility, blood profile and faecal microflora in weaning pigs. A total of 200 weaning pigs with initial body weight (IBW, 6.97 ± 1.22 kg) were randomly assigned to four treatments: CON, basal diet; during phase 1, 2 and 3, 0.3FA, basal diet + 0.3%, 0.2%, 0.1% coated n-3FA; 0.6FA, basal diet + 0.6%, 0.4% 0.2% coated n-3FA; 0.9FA, basal diet + 0.9%, 0.6% and 0.3% coated n-3FA. When the graded level of n-3FA supplementation was added in the diet, a linearly increased average daily gain and gain/feed of the pig was observed in every phase (p < .05), the digestibility of dry matter (DM) was linearly increased, whereas nitrogen (N) digestibility showed a trend (p = .0594), the concentration of serum IgG (p = .0886) as well as the faecal lactobacillus count showed a linearly increase at the end of the experiment. However, there were no differences in the concentrations of serum haptoglobin and faecal microflora on among treatment. In conclusion, the coated n-3FA diet showed positive effects in improving growth performance, digestibility of DM and N in weaning pigs. Furthermore, it has a trend improvement on the count of lactobacillus in weaning pigs.

中文翻译：

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日粮中添加分级 omega-3 脂肪酸对断奶仔猪生长性能、营养物质消化率、血液特征、粪便微生物的影响

摘要 本实验旨在确定日粮中添加包裹 omega-3 脂肪酸 (n-3FA) 对断奶仔猪生长性能、营养物质消化率、血液特征和粪便微生物群的影响。总共 200 头初始体重（IBW，6.97 ± 1.22 kg）的断奶猪被随机分配到四个处理组：CON、基础日粮；在第 1、2 和 3 阶段，0.3FA，基础日粮 + 0.3%、0.2%、0.1% 包衣 n-3FA；0.6FA，基础日粮 + 0.6%、0.4% 0.2% 包衣 n-3FA；0.9FA，基础饮食 + 0.9%、0.6% 和 0.3% 包衣 n-3FA。当日粮中添加分级水平的 n-3FA 时，在每个阶段都观察到猪的平均日增重和增重/饲料线性增加（p < .05），干物质 (DM) 的消化率呈线性增长增加，而氮 (N) 消化率呈趋势 (p = .0594)，血清 IgG 浓度 (p = .0886) 以及粪便乳酸菌计数在实验结束时呈线性增加。然而，血清结合珠蛋白和粪便微生物群落的浓度在治疗之间没有差异。总之，涂层n-3FA日粮在改善断奶仔猪生长性能、干物质和氮的消化率方面显示出积极的作用。此外，它对断奶仔猪的乳酸菌数量有改善的趋势。断奶仔猪 DM 和 N 的消化率。此外，它对断奶仔猪的乳酸菌数量有改善的趋势。断奶仔猪 DM 和 N 的消化率。此外，它对断奶仔猪的乳酸菌数量有改善的趋势。