Abstract: To determine the effect of acidifiers on intestinal mucosal morphology, microflora and volatile fatty acids of early weaned piglets, 90 early weaned piglets (7.5 kg±0.15 kg) were divided into three groups with 6 replications 5 each. Diet were mixed with 0, 0.2%, 0.4% acidifiers respectively. The results showed that acidifier reduce the pH value of the stomach and duodenum significantly (P<0.05) while the effect decreased as the chyme moved backward; it increased the amount of Lactobacilli and total anaerobic organism (P<0.05) while decreased E.coli and total aerobic organism; it significantly increased butyric acid and pentanoic acid concentration of colon chyme (P<0.05) while decreased acetic acid content (P<0.05);it promoted the growth of the jejunum intestinal villi (P<0.05) to increased the intestinal absorption area.

Key words: early-weaned piglets; acidifiers; intestinal mucosal morphology; microflora; volatile fatty acids 