Lactic acid bacterial inoculant effects on the vitamin content of alfalfa and Chinese leymus silage

作者：Tingting Jia, Zhiqiang Sun, Run Gao, Zhu Yu · 发表于：Asian-Australasian Journal of Animal Sciences · 年份：2019 · DOI：10.5713/ajas.19.0135 · 被引用次数：23 · 研究领域：Ruminant Nutrition and Digestive Physiology、Animal Nutrition and Physiology、Agriculture, Soil, Plant Science

OBJECTIVE: Information regarding the vitamin content of silage is limited. This study investigated the changes in the vitamin content of alfalfa and Chinese leymus silages with or without a lactic acid bacterial inoculant. METHODS: Alfalfa at the early flowering stage and Chinese leymus at the full-bloom stage were harvested. The treatments for each forage type were control (deionized water only) and 1×106 colony-forming units (cfu) Lactobacillus plantarum (LP) g-1 FM. After 45 d ensiling, all silages were sampled for evaluating the vitamin content, fermentation quality and chemical composition. RESULTS: The LP inoculant decreased the pH and ammonia nitrogen content of the alfalfa and Chinese leymus silages and significantly (p < 0.05) increased the lactic acid, acetic acid, propionic acid content and Flieg`s points. Prior to ensiling, the levels of five B-group vitamins (thiamin, riboflavin, niacin, pantothenic acid, pyridoxine) and α-tocopherol in alfalfa were significantly higher than those in Chinese leymus (p < 0.01). Ensiling decreased the levels of the five B-group vitamins in both alfalfa and Chinese leymus while increasing the α-tocopherol content of Chinese leymus. The thiamin, riboflavin, niacin and pantothenic acid levels in the LP-treated silage were significantly (p < 0.05) lower than those in the untreated silage for both forages. The α-tocopherol content in the LP-treated alfalfa silage was significantly (p < 0.05) higher than that ...