Acta Veterinaria et Zootechnica Sinica ›› 2020, Vol. 51 ›› Issue (10): 2599-2608.doi: 10.11843/j.issn.0366-6964.2020.10.029

• RESEARCH NOTES • Previous Articles     Next Articles

Effects of Sodium Nitrate and Disodium Fumarate Mixture on Ruminal Methane Production, Fermentation Parameters, Fatty Acids Profiles and Rumen Microbial Population in Water Buffalo In vitro

GUO Yanxia, LI Mengwei, TANG Zhenhua, PENG Lijuan, PENG Kaiping, LIANG Xin, XIE Fang, YANG Chengjian*   

  1. Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology of Ministry of Agriculture, Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning 530001, China
  • Received:2020-04-23 Online:2020-10-25 Published:2020-10-26

Abstract: The objective of this study was to investigate the effects of different sodium nitrate and disodium fumarate ratios on ruminal methane production, fermentation parameters, fatty acids profiles and microbial population in water buffalo in vitro in presence of α-linolenic acid. Three female water buffaloes (body weight of (650±50) kg) with permanent rumen fistula were selected as the donors of rumen contents. Treatments additives were prepared as sodium nitrate and disodium fumarate mixtures at ratios of 2:1, 1:1, 1:2. Control group without any sodium nitrate or disodium fumarate. All groups were added with 0.25 mg·mL-1 α-linolenic acid. The concentration of sodium nitrate and disodium fumarate mixtures was 1 mg·mL-1. The results showed that mehtane production were reduced with different ratios of sodium nitrate and disodium fumarate mixture, the average decrease was 90.63%. The total volatile fatty acid (TVFA) concentration and most rumen microorganisms population were significantly reduced (P<0.05), but the concentration of acetate, EPA and CLA, ratios of acetate to propionate ratio and UFA/SFA were significantly increased (P<0.05) with sodium nitrate and disodium fumarate mixtures at ratio of 2:1. 3) Sodium nitrate and disodium fumarate mixtures at ratio of 1:2 had no significant effect on TVFA content, fatty acid content and rumen microbial populaiton(P>0.05). 4) The concentrations of EPA, CLA and UFA/SFA ratio were increased (P<0.05) with sodium nitrate and disodium fumarate mixtures at ratio of 1:1, but Butyrivibrio fibrisolvens and atypical butyrivibrio populations were decreased. It can be concluded that different proportion of sodium nitrate and sodium fumarate mixture can cause methane reduction, the adverse effect of sodium nitrate on rumen fermentation can be alleviated by the increased proportion of disodium fumarate.

Key words: sodium nitrate, disodium fumarate, methane, in vitro fermentation, rumen microorganism

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