Effect of applying different additives on the fermentation characteristics and aerobic stability of total mixed ration silage prepared with local feed resources in Tibet
文献类型： 外文期刊
作者： Dong, Zhihao 1 ; Tao, Xuxiong 1 ; Bao, Yuhong 2 ; Zhao, Jie 1 ; Wang, Siran 1 ; Li, Junfeng 1 ; Liu, Qinhua 1 ; Shao, Tao 1 ;
作者机构： 1.Nanjing Agr Univ, Coll Agrograssland Sci, Inst Ensiling & Proc Grass, Nanjing 210095, Peoples R China
2.Tibet Acad Agr & Anim Husb Sci, Inst Grassland Sci, Lhasa, Peoples R China
关键词： additive; aerobic stability; fermentation quality; fermented total mixed ration
期刊名称：GRASSLAND SCIENCE （ 影响因子：1.65； 五年影响因子：1.569 ）
ISSN： 1744-6961
年卷期：
页码：
收录情况： SCI
摘要： This study was conducted to assess the effect of different additives on the fermentation characteristics, in vitro digestibility and aerobic stability of fermented total mixed ration (FTMR) prepared with local feed resources in Tibet, China. Additives added to FTMR were Lactobacillus buchneri (1 x 10(6) cfu/g fresh weight (FW)), acetic acid (0.3% FW), propionic acid (0.4% FW), 1,2-propanediol and 1-propanol (0.5% FW). FTMR were opened after 90 days and subjected to a 14-d aerobic stability test. The results showed that L. buchneri, 1,2-propanediol and 1-propanol increased (P < 0.05) pH values and acetic acid concentrations and decreased (P < 0.05) lactic acid concentrations in FTMR. Adding acetic acid decreased (P < 0.05) lactic/acetic acid ratio. FTMR treated with propionic acid had higher (P < 0.05) lactic acid, propionic acid and DM recovery compared with the other treatments. Treating FTMR with acetic acid, 1,2-propanediol and 1-propanol decreased (P < 0.05) yeast counts. The in vitro potential gas production tended to be lower in L. buchneri-treated silage than other silages. During aerobic exposure, FTMR treated with propionic acid spoiled first, with marked pH increase and lactic acid decrease from days 9 to 14. Treatment with L. buchneri, acetic acid, 1,2-propanediol and 1-propanol markedly improved the aerobic stability, as indicated by nearly unchanged pH and lactic acid concentrations. The results suggest that L. buchneri, acetic acid, 1,2-propanediol and 1-propanol did not adversely affect the in vitro digestibility and could be effective additives for enhancing the aerobic stability of FTMR prepared on Tibetan plateau.
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