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The experiment was to study the effect of Piper sarmentosum extract (PSE) on growth performance, immune organ index, immune globulin, serum biochemical indices and antioxidant function of chicks. A total of 500 one-day-old Danzhou chicks with similar body weight and good health were divided into five groups, with five replicates in each group and 20 chicks in each replicate. The chicks in BC group (control group) were fed with basal diet, the chicks in PC group (antibiotic group) were fed with basal diet supplemented with 200 mg/kg enrofloxacin, and the chicks in PSE1 group, PSE2 group and PSE3 group were fed with basal diet supplemented with 100, 200 and 300 mg/kg PSE, respectively. The feeding period was 28 d. The results showed that the catalase activity in PSE1 group was significantly increased (P<0.05). The total antioxidant capacity in PSE1 group and PSE2 group was significantly increased (P<0.05). The serum uric acid content and malondialdehyde content were significantly decreased in PSE2 group and PSE3 group (P<0.05). The experiment indcates that PSE supplementation can improve the growth performance and antioxidant performance of chicks, and reduce the content of uric acid in serum, the appropriate dosage of PSE is 200 mg/kg. [ABSTRACT FROM AUTHOR]

The experiment was conducted to study the effect of composite plant extracts Piper sarmentosum Roxb. and guava leaf on growth performance and serum indexes of weaned piglets. A total of 200 21-day-old weaned piglets were selected and randomly divided into two groups, with five replicates in each group and 20 piglets in each replicate. Piglets in control group were fed with a basal diet, the piglets in experimental group were fed with the basal diet supplemented with composite plant extracts at 200 mg/kg. The experimental period was 21 d. The results showed that there was no significant difference on growth performance of piglets among the groups（P>0.05）. Compared with control group, the experimental group supplemented with the compound plant extract in the diet significantly decreased the serum cholesterol（CHOL） and low-density lipoprotein cholesterol（LDL-C） content of piglets（P<0.05）, glutathione peroxidase（GSH-Px）activity was significantly increased（P<0.05）, serum content of interleukin-4（IL-4）, interleukin-10（IL-10） and transforming growth factor-β（TGF-β） were significantly increased（P<0.05）, the content of interleukin-1β（IL-1β）,interleukin-6（IL-6） and tumor necrosis factor-α（TNF-α） were significantly decreased（P<0.05）, and serum endotoxin（ET-1） content and diamine oxidase（DAO） activity were significantly decreased（P<0.05）. The study indicates that adding compound plant extracts to diet can improve the antioxidant performance and immune function of weaned piglets, and improve the intestinal mucosal barrier function of piglets. [ABSTRACT FROM AUTHOR]