草地学报 ›› 2026, Vol. 34 ›› Issue (1): 356-365.DOI: 10.11733/j.issn.1007-0435.2026.01.034

• 技术研发 • 上一篇    

添加蔗糖和乳酸菌剂对高水分苜蓿青贮中优势梭菌和乳酸菌菌群的影响

李钦1,2, 林冰1, 毛培春2, 田小霞2, 马帅2, 孟林2, 郑明利2, 郭玉霞1   

  1. 1. 河南农业大学动物科技学院, 河南 郑州 450046;
    2. 北京市农林科学院草业花卉与景观生态研究所, 北京 100097
  • 收稿日期:2025-03-18 修回日期:2025-05-23 发布日期:2025-12-24
  • 通讯作者: 郑明利,E-mail:bjzhengml@163.com;郭玉霞,E-mail:yuxiaguo@163.com
  • 作者简介:李钦(2000-),男,汉族,河南新乡人,硕士研究生,主要从事动物营养与饲料科学研究,E-mail:19503820416@163.com;
  • 基金资助:
    国家自然科学基金项目(32201461);北京市农林科学院青年科研基金项目(QNJJ202310)资助

Effects of Sucrose and Lactic Acid Bacteria Inoculantion on Dominant Clostridia and Lactic Acid Bacteria Communities in High-moisture Alfalfa Silage

LI Qin1,2, LIN Bing1, MAO Pei-chun2, TIAN Xiao-xia2, MA Shuai2, MENG Lin2, ZHENG Ming-li2, GUO Yu-xia1   

  1. 1. College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan Province 450046, China;
    2. Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
  • Received:2025-03-18 Revised:2025-05-23 Published:2025-12-24

摘要: 试验旨在通过高通量测序技术并结合相关性网络分析探讨高水分苜蓿青贮中优势梭菌菌群多样性并筛选靶向抑菌乳酸菌。设置蔗糖组(添加量为20 g·kg-1 FM)、乳酸菌组(Lactiplantibacillus plantarumLentilactobacillus buchneri组成,接种量为106 cfu·g-1 FM)和对照组,室温厌氧发酵56 d。结果表明:对照组和乳酸菌组均发生严重的丁酸发酵;与对照组和乳酸菌组相比,蔗糖组显著提高了苜蓿青贮的乳酸含量(P<0.05),显著降低了丁酸含量、氨态氮含量和梭菌数量(P<0.05)。Clostridium sp. BTY5、Garciella sp.GK3和Clostridiales bacterium mt11与丁酸、氨态氮以及梭菌数量呈显著正相关(P<0.05)。L. buchneriLactobacillus melliventris与这3种关键梭菌呈显著负相关(P<0.05),并且与pH值、丁酸、氨态氮及梭菌数量呈显著负相关(P<0.05)。综上所述,Clostridium sp. BTY5、Garciella sp. GK3和Clostridiales bacterium mt11是引起高水分苜蓿青贮丁酸发酵的关键梭菌,添加蔗糖可有效改善青贮发酵品质,L. buchneriL. melliventris具有靶向抑制关键梭菌的潜力。

关键词: 苜蓿青贮, 梭菌, 乳酸菌, 发酵品质

Abstract: The aim of this study was to investigate the diversity of dominant Clostridia community and screen targeted bacteriostatic lactic acid bacteria in high-moisture alfalfa silage through high-throughput sequencing combined with correlation network analyses. Sucrose group (sucrose added at 20 g·kg-1 fresh matter, FM), LAB group (LAB inoculant was composed of Lactiplantibacillus plantarum and Lentilactobacillus buchneri and applied at 106 cfu·g-1 FM) , and control group were established. All groups were subjected to 56 days of anaerobic ensiling at ambient temperature. The results showed that severe butyric acid fermentation occurred in both the control and LAB groups. Compared to the control and LAB groups, the sucrose group significantly increased the lactic acid content (P<0.05), while significantly decreased butyric acid, ammonia nitrogen, and Clostridia counts (P<0.05). Clostridium sp. BTY5, Garciella sp. GK3, and Clostridiales bacterium mt11 were significantly positively correlated with butyric acid, ammonia nitrogen, and Clostridia counts (P<0.05). L. buchneri and Lactobacillus melliventris were significantly negatively correlated with these three key Clostridia (P<0.05) and were significantly negatively correlated with pH, butyric acid, ammonia nitrogen, and Clostridia counts (P<0.05). In conclusion, Clostridium sp. BTY5, Garciella sp. GK3, and Clostridiales bacterium mt11 were identified as the key Clostridia responsible for butyric acid fermentation in high-moisture alfalfa silage. The addition of sucrose can effectively improve silage fermentation quality. L. buchneri and L. melliventris have the potential to inhibit targeted key Clostridia.

Key words: Alfalfa silage, Clostridia, Lactic acid bacteria, Fermentation quality

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