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The experiment was conducted to investigate the effect of shikimic acid on growth performance, diarrhea index, serum immunity and antioxidant indicators of piglets infected with porcine epidemic diarrhea virus (PEDV). A total of 120 clinically confirmed PEDV infected seven-day-old piglets (Duroc × Landrace × Yorkshire) were randomly divided into six groups, with five replicates in each group and four pigs in each replicate. Treatment group 1, group 2 and group 3 were administered 800, 400 and 200 mg/kg of shikimic acid daily to piglets infected with PEDV, treatment group 4 were treated with daily administration of 400 mg/kg chlorogenic acid to piglets infected with PEDV, treatment group 5 were treated with 20 000 units of gentamicin per day to piglets infected with PEDV, treatment group 6 were treated as positive control groups, and another 20 healthy piglets were selected as the blank control group. The experiment lasted for 5 d, and then observed for 3 d. The results showed that compared with control group with positive PEDV infection, the ADG of piglets with treatment group 1, group 2 and group 3 was significantly increased (P<0.05). The cure rate of PEDV infection in treatment group 1 and group 2 reached 85%, and the cure rate in treatment group 5 was 65%. The IgG content in the serum of piglets in group 1, group 2 and group 3 was significantly increased (P<0.05). The activity of SOD, CAT, NO, MPO, GSH-Px and T-AOC in the serum of piglets in group 1, group 2 and group 3 were significantly increased (P<0.05), and the content of MDA and XOD was significantly reduced (P<0.05). The experiment indicates that shikimic acid can improve the growth performance of piglets, reduce diarrhea index, enhance immunity and serum antioxidant capacity, and have a disease resistance and growth promoting effect on PEDV infected piglets. [ABSTRACT FROM AUTHOR]

The experiment was to investigate the effect of dietary supplementation of functional fiber and precision feeding on reproductive performance of sows during pregnancy. A total of 300 parturients sows were randomly divided into three groups with 100 replicates in each group and one pig in each replicate: control group, experiment group Ⅰ and experiment group Ⅱ. During pregnancy, sows in control group were fed with basal diet in the 'high-low-high' mode. Sows in experimental group Ⅰ were fed with modified formula diet + 1% functional fiber in 'high-low-high' mode. Sows in experimental group Ⅱ were fed with modified diet + 1% functional fiber, and the feeding amount was dynamically adjusted according to the body condition of sows. The experiment lasted for 157 d. The results showed that the constipation rate of each experiment group was significantly lower than that of control group (P<0.01). The backfat thickness of sows in experimental group was significantly lower than that of control group at 90 d of gestation and before delivery (P<0.01), and the backfat loss of sows in experimental group was significantly lower than that of control group at weaning (P<0.01). The number of live piglets, the number of healthy piglets, the birth weight of the piglets, the average number of weaned heads in each litter, the weight of the weaning litter and the seven-day weaning rate of each experimental group were significantly higher than those of control group (P<0.01). The days from weaning to mating in experimental group were significantly lower than those in control group (P<0.01). Compared with the control group, the feed input cost of sows in experimental group Ⅱ was the lowest, and the feed cost of the sows in experimental group Ⅱ was reduced by 1.24 yuan, and the benefit per litter was increased by 1 966.24 yuan. The studies indicates that the addition of functional fiber and precise feeding in gestational diets of sows can alleviate constipation, adjust the pregnancy, improve reproductive performance, reduce production costs, and increase economic benefits. [ABSTRACT FROM AUTHOR]