【摘要】 为了研究二甲酸钾(potassium diformate,KDF)对仔猪生长性能、腹泻率和粪样菌群的影响,本试验选用28日龄断奶、体重在5~7 kg的(长×大)仔猪270头,随机分为3组:基础日粮组、抗生素组(基础日粮+16.6 mg/kg硫酸粘杆菌素,45 mg/kg吉他霉素,83 mg/kg喹乙醇)、KDF组(基础日粮+10 g/kg KDF),进行为期5周的试验。结果表明:KDF组体重分别比基础日粮组和抗生素组提高了9.9%和8.0%(P<0.05),腹泻率显著低于基础日粮组和抗生素组(P<0.05)。断奶后第1周,抗生素组直肠内容物中乳酸杆菌的含量显著低于基础日粮组(P<0.05),KDF组和基础日粮组间无显著差异(P>0.05);断奶后第1、2和5周抗生素组和KDF组直肠内容物中肠杆菌含量显著低于基础日粮组(P<0.05)。以上结果提示:KDF比抗生素更有助于仔猪建立较健康的肠道细菌区系,从而减少仔猪腹泻,减少仔猪因腹泻而导致的生长性能下降。更多还原

【Abstract】 The present study was conducted to assess the effect of dietary potassium diformate( KDF) on growth performance,diarrhea and the population of Enterobacteria and Lactobacilli in rectum chyme of weaning piglets. Piglets( Landrace × Large) of 270 at 28 d of age were weaned and allocated randomly into three groups: basal diet,antibiotic( basal diet supplemented with 16. 6 mg / kg colistin sulfate,45 mg / kg kitasamycin and 83 mg / kg olaquindox) and KDF( basal diet supplemented with 10 g / kg KDF) groups. After 5 weeks feeding,the body weight gain in KDF group was more than that in antibiotic and the basal diet groups by 9. 9% and 8. 0%,respectively( P < 0. 05).The percentage of diarrhea in the KDF group were significantly decreased( P < 0. 05). The population of Enterobacteria and Lactobacilli in rectum chyme showed that the copies of Lactobacilli in the antibiotic group was significantly lower than in the basal diet group( P = 0. 01) at the 1stweek post- weaning,however,no significant difference of Lactobacilli copies between KDF and basal diet groups( P > 0. 05) by real time PCR. Whereas,the copies of Enterobacteria were significantly lower in the antibiotic group and KDF group at the 1st,2ndand 5thweek post weaning( P < 0. 05). These results suggest that dietary KDF may lead to more favorable gut microbiota than antibiotics,therefore decrease the incidence of post- weaning diarrhea and increase the growth performance.更多还原