title: Effects of Lactobacillus formosensis S215Tand Lactobacillus buchneri on quality and in vitro ruminal biological activity of condensed tannins in sweet potato vines silage.
abstract: OBJECTIVE
  This study investigated the influence of two microbial inoculants; Lactobacillus formosensis and Lactobacillus buchneri on fermentation quality, chemical composition, aerobic stability and in vitro ruminal biological activity of condensed tannins in sweet potato vines silage.
  
  
  RESULTS
  Sweet potato vines were ensiled for 28 and 60 days; without inoculant (CON), with Lact. buchneri (LB) or with Lact. formosensis (LF), both inoculants applied to achieve 1 × 106CFU g-1fresh forage. Lactobacillus formosensis silage had lower pH and higher lactic acid than all treatments. Yeasts and moulds were not detected in LB silage after ensiling. Lactobacillus buchneri silage was more aerobically stable than all treatments, whereas LF was more stable than CON silage. In vitro ruminal biological activity of condensed tannins was lower in microbial-inoculated silages than CON after ensiling.
  
  
  CONCLUSIONS
  Lactobacillus formosensis improved fermentability by reducing silage pH and improved aerobic stability by producing more propionate, which inhibited yeast activity. Lactobacillus buchneri improved aerobic stability of the silage by producing more acetate. Both strains effectively reduced the antinutritional effect of condensed tannins after ensiling.
  
  
  CONCLUSIONS
  Lactobacillus formosensis has the potential to be used as a silage inoculant because of its ability to improve fermentability and aerobic stability in sweet potato vines silage.
authors.affiliation: Department of International Master Program of Agriculture, National Chung Hsing University, Taichung, Taiwan, ROC.
authors.forename: M C
authors.initials: MC
authors.lastname: Mangwe
authors.affiliation: Department of Animal Science, National Chung Hsing University, Taichung, Taiwan, ROC.
authors.forename: K T
authors.initials: KT
authors.lastname: Rangubhet
authors.affiliation: Department of Animal Science, Faculty of Agriculture, Science and Technology, North-West University, Mmabatho, Mafikeng, South Africa.
authors.forename: V
authors.initials: V
authors.lastname: Mlambo
authors.affiliation: Department of Animal Science, National Chung Hsing University, Taichung, Taiwan, ROC.
authors.forename: B
authors.initials: B
authors.lastname: Yu
authors.affiliation: Department of Animal Science, National Chung Hsing University, Taichung, Taiwan, ROC. samchiang@nchu.edu.tw.
authors.forename: H I
authors.initials: HI
authors.lastname: Chiang
mesh_terms: D000332:Aerobiosis; D005285:Fermentation; D027723:Ipomoea batatas; D019344:Lactic Acid / Q000378:metabolism; D007778:Lactobacillus / Q000502:physiology*; D044945:Proanthocyanidins / Q000378:metabolism*; D012820:Silage / Q000032:analysis / Q000382:microbiology*; D015003:Yeasts / Q000302:isolation & purification
chemical_list: D044945:Proanthocyanidins; D019344:Lactic Acid
keywords: aerobic stability; ensiling; fermentability; in vitro ruminal fermentation; microbial inoculant