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Acta Prataculturae Sinica ›› 2016, Vol. 25 ›› Issue (1): 197-206.DOI: 10.11686/cyxb2015095

• Orginal Article • Previous Articles     Next Articles

Quality and lactic acid bacteria of mixed corn stalk and cabbage waste silage

REN Hai-Wei1, 2, 3, ZHAO Tuo2, LI Jin-Ping1, 3, *, LI Xue-Yan2, XU Na2, WANG Yong-Gang2, WANG Xiao-Li4, GAO Xiao-Hang2   

  1. 1.Western China Energy & Environment Research Center, Lanzhou University of Technology, Lanzhou 730050, China;
    2. School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
    3.China Northwestern Collaborative Innovation Center of Low-carbon Urbanization Technologies, Lanzhou 730050, China;
    4. Animal and Veterinary Pharmaceutics Science of Chinese Academy of Agricultural Sciences, Lanzhou 730050, China
  • Received:2015-02-20 Online:2016-01-20 Published:2016-01-20

Abstract: Silage made with a mixture of corn stalk (CS) and cabbage waste (CW) were mixed and ensilaged at different ratios, 29∶19 (ME1), 27∶21 (ME2), 25∶23 (ME3), 23∶25 (ME4), 21∶27 (ME5) and 19∶29 (ME6), respectively. The chemical composition and fermentation traits were measured after 30 days (d) to identify the optimal ratio of corn stalk and cabbage waste and the diversity of lactic acid bacteria in each mixture. The pH and the ratio of ammonia nitrogen to total nitrogen (AN/TN) of the ME5 silage was significantly lower than the other mixes (P<0.05). The lactic acid content (LA) of ME5 was significantly higher than the other mixes (P<0.05) whereas the ammonia nitrogen/total nitrogen ratio (AN/TN) of ME5 was significantly lower than other mixes. Analysis of lactic acid bacteria showed that a total of 10 lactic acid bacteria strains were isolated from the ME5 group, belonging to three different genera; Lactobacillus, Enterococcus and Leuconostoc. Two strains of Lactobacillus brevis, one strain of Enterococcus faecium, five strains of Leuconostoc mesenteroides subsp. mesenteroides and two strains of Lactobacillus plantarum were identified. Among these isolates, Lactobacillus and Enterococcus were homofermentative lactic bacteria, which are able to produce more lactic acid than heterofermentative lactic bacteria. Lactobacillus and Enterococcus played a key role in the fermentation of these silages. In conclusion, mixed silages of CS and CW were found to be feasible with an optimum ratio of 21∶27 respectively.