| The purpose of this study is to study the effects and mechanisms of extracts of Scutellaria baicalensis and Lonicera japonica(SL)on reproductive performance of sows and growth performance of piglets.This study consists of two experiments,the main contents and results were as follows:Exp.? Effects of SL on the performance and health of sows.This experiment adopted 2 × 2 test design,one factor was the periods of supplementing sow with SL(80 to 107 days of pregnancy & 108 days of pregnancy to 21 days of lactation),the other factor was SL(0% & 0.05%).Selecting 80 sows with good health and similar body condition at 80 days gestation.They were randomly divided into 4 groups,20 replicates in each group,one sow per replicate.The results show that dietary supplemented with 1000mg/kg SL in late gestation(80d~ 107 d of gestation)significantly decreased IL-6 and TNF-?(P < 0.05)levels of sows in delivery.But there were no effect on reproductive performance,milk quality,antioxidant index,liver function index,immune index of sows(P > 0.05),piglets growth performance,piglets serum immunoglobulin and cytokines(P > 0.05).Administration of SL improved litter weight,average weigh and litter weight gain(p<0.05)during the perinatal to weaning(108 days of pregnancy to 21 days of lactation)and the overall period.Compared with control group,supplementing sows with SL during the perinatal to weaning and the overall period significantly increased the contents of protein,solids and defatted solids in colostrum(P < 0.05),and significantly increased the protein content,globulin content and CAT activity(P < 0.05)of sows in delivery,the serum T-AOC(P < 0.05)and CAT activity(P < 0.01)of sows on 14 days of lactation.During 80 days of pregnancy to weaning,supplementing sows with 1000 mg/kg SL can significantly increased the number of weaned piglets,weaning piglet breeding rate,the IgG and IgM contents of 14-day-old piglets and decreased the serum IL-6 and TNF-? content of sows in delivery(P < 0.05).During the whole experiment,there was no significant interaction between two periods.Exp.? Effects of SL on growth performance and nutrient digestibility of weaned piglets.After Exp.?,120 offspring of sows were randomly assigned to 4 treatments in a 2 ×2 factorial arrangement,one factor is the level of SL in sows diet(0mg/kg and 1000mg/kg),another factor is the level of SL in offspring piglets diet(500mg/kg and 1000mg/kg).It means that piglets were assigned to 4 treatments,with 5 replicates per treatment and 6 piglets per replicate.The test periods from 28 days to 70 days of piglets.The results show that sows and piglets diet supplement SL don't affect the average weight,average daily gain,average daily feed intake and feed conversion ratio of piglets(P > 0.05).Adding the SL to sow diet(adding 1000 mg/kg)and piglets diet(adding 500 mg/kg)can significantly increase the digestibility of protein,dry matter and energy in piglets(P < 0.05).Adding the SL in sows and piglets diet don't affect piglets' performance and apparent digestibility of nutrients(P > 0.05).In summary,the addition of 1000 mg/kg SL to sows' diets from late gestation to weaning and perinatal to weaning can improve the reproductive performance,colostrum quality,antioxidant function,immune ability and liver function of sows,and improve the growth performance and immune ability of piglets.Moreover,adding 1000 mg/kg SL to sows diet from late gestation to weaning is more effective than that from perinatal to weaning.Adding 500mg/kg to the weaned piglets diet had no significant effect on the growth performance of the piglets,but it could improve the digestibility of nutrients in piglets. |
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