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Pang H, Zhang X, Chen C, Ma H, Tan Z, Zhang M, Duan Y, Qin G, Wang Y, Jiao Z, Cai Y. Combined Effects of Lactic Acid Bacteria and Protease on the Fermentation Quality and Microbial Community during 50 Kg Soybean Meal Fermentation Simulating Actual Production Scale. Microorganisms 2024; 12:1339. [PMID: 39065107 PMCID: PMC11278788 DOI: 10.3390/microorganisms12071339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 06/15/2024] [Accepted: 06/20/2024] [Indexed: 07/28/2024] Open
Abstract
The improvement in the utilization rate and nutritional value of soybean meal (SBM) represents a significant challenge in the feed industry. This study conducted a 50 kg SBM fermentation based on the 300 g small-scale fermentation of SBM in early laboratory research, to explore the combined effects of lactic acid bacteria (LAB) and acid protease on fermentation quality, chemical composition, microbial population, and macromolecular protein degradation during fermentation and aerobic exposure of SBM in simulated actual production. The results demonstrated that the increase in crude protein content and reduction in crude fiber content were considerably more pronounced after fermentation for 30 days (d) and subsequent aerobic exposure, compared to 3 d. It is also noteworthy that the treated group exhibited a greater degree of macromolecular protein degradation relative to the control and 30 d of fermentation relative to 3 d. Furthermore, after 30 d of fermentation, adding LAB and protease significantly inhibited the growth of undesired microbes including coliform bacteria and aerobic bacteria. In the mixed group, the microbial diversity decreased significantly, and Firmicutes replaced Cyanobacteria for bacteria in both groups' fermentation.
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Affiliation(s)
- Huili Pang
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450052, China; (H.P.); (X.Z.); (H.M.); (Z.T.); (M.Z.); (Y.D.); (G.Q.); (Y.W.)
| | - Xinyu Zhang
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450052, China; (H.P.); (X.Z.); (H.M.); (Z.T.); (M.Z.); (Y.D.); (G.Q.); (Y.W.)
| | - Chen Chen
- School of Life Sciences, Zhengzhou University, Zhengzhou 450052, China;
| | - Hao Ma
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450052, China; (H.P.); (X.Z.); (H.M.); (Z.T.); (M.Z.); (Y.D.); (G.Q.); (Y.W.)
| | - Zhongfang Tan
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450052, China; (H.P.); (X.Z.); (H.M.); (Z.T.); (M.Z.); (Y.D.); (G.Q.); (Y.W.)
| | - Miao Zhang
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450052, China; (H.P.); (X.Z.); (H.M.); (Z.T.); (M.Z.); (Y.D.); (G.Q.); (Y.W.)
| | - Yaoke Duan
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450052, China; (H.P.); (X.Z.); (H.M.); (Z.T.); (M.Z.); (Y.D.); (G.Q.); (Y.W.)
| | - Guangyong Qin
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450052, China; (H.P.); (X.Z.); (H.M.); (Z.T.); (M.Z.); (Y.D.); (G.Q.); (Y.W.)
| | - Yanping Wang
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450052, China; (H.P.); (X.Z.); (H.M.); (Z.T.); (M.Z.); (Y.D.); (G.Q.); (Y.W.)
| | - Zhen Jiao
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450052, China; (H.P.); (X.Z.); (H.M.); (Z.T.); (M.Z.); (Y.D.); (G.Q.); (Y.W.)
| | - Yimin Cai
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450052, China; (H.P.); (X.Z.); (H.M.); (Z.T.); (M.Z.); (Y.D.); (G.Q.); (Y.W.)
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Wei X, Sun X, Zhang H, Zhong Q, Lu G. The influence of low-temperature resistant lactic acid bacteria on the enhancement of quality and the microbial community in winter Jerusalem Artichoke ( Helianthus tuberosus L.) silage on the Qinghai-Tibet Plateau. Front Microbiol 2024; 15:1297220. [PMID: 38348187 PMCID: PMC10860748 DOI: 10.3389/fmicb.2024.1297220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Accepted: 01/11/2024] [Indexed: 02/15/2024] Open
Abstract
Jerusalem Artichoke (Helianthus tuberosus L.), an emerging "food and fodder" economic crop on the Qinghai-Tibet Plateau. To tackle problems such as incomplete fermentation and nutrient loss occurring during the low-temperature ensilage of Jerusalem Artichokes in the plateau's winter, this study inoculated two strains of low-temperature resistant lactic acid bacteria, Lactobacillus plantarum (GN02) and Lactobacillus brevis (XN25), along with their mixed components, into Jerusalem Artichoke silage material. We investigated how low-temperature resistant lactic acid bacteria enhance the quality of low-temperature silage fermentation for Jerusalem Artichokes and clarify its mutual feedback effect with microorganisms. Results indicated that inoculating low-temperature resistant lactic acid bacteria significantly reduces the potential of hydrogen and water-soluble carbohydrates content of silage, while increasing lactic acid and acetic acid levels, reducing propionic acid, and preserving additional dry matter. Inoculating the L. plantarum group during fermentation lowers pH and propionic acid levels, increases lactic acid content, and maintains a dry matter content similar to the original material. Bacterial community diversity exhibited more pronounced changes than fungal diversity, with inoculation having a minor effect on fungal community diversity. Within the bacteria, Lactobacillus remains consistently abundant (>85%) in the inoculated L. plantarum group. At the fungal phylum and genus levels, no significant changes were observed following fermentation, and dominant fungal genera in all groups did not differ significantly from those in the raw material. L. plantarum exhibited a positive correlation with lactic acid and negative correlations with pH and propionic acid. In summary, the inoculation of L. plantarum GN02 facilitated the fermentation process, preserved an acidic silage environment, and ensured high fermentation quality; it is a suitable inoculant for low-temperature silage in the Qinghai-Tibet Plateau.
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Affiliation(s)
- Xiaoqiang Wei
- Qinghai University, Xining, China
- Qinghai Provincial Key Laboratory of Vegetable Genetics and Physiology, Xining, China
- Academy of Agriculture and Forestry Sciences, Qinghai University, Xining, China
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
| | - Xuemei Sun
- Qinghai University, Xining, China
- Qinghai Provincial Key Laboratory of Vegetable Genetics and Physiology, Xining, China
- Academy of Agriculture and Forestry Sciences, Qinghai University, Xining, China
| | - Haiwang Zhang
- Qinghai University, Xining, China
- Qinghai Provincial Key Laboratory of Vegetable Genetics and Physiology, Xining, China
- Academy of Agriculture and Forestry Sciences, Qinghai University, Xining, China
| | - Qiwen Zhong
- Qinghai University, Xining, China
- Qinghai Provincial Key Laboratory of Vegetable Genetics and Physiology, Xining, China
- Academy of Agriculture and Forestry Sciences, Qinghai University, Xining, China
| | - Guangxin Lu
- Qinghai University, Xining, China
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
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Wagali P, Pelech I, Sabastian C, Ben Ari J, Tagari H, Mabjeesh SJ. The Effect of Microbial Inoculum and Urea Supplements on Nutritive Value, Amino Acids Profile, Aerobic Stability and Digestibility of Wheat and Corn Silages. Animals (Basel) 2023; 13:2197. [PMID: 37443995 DOI: 10.3390/ani13132197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 06/23/2023] [Accepted: 07/03/2023] [Indexed: 07/15/2023] Open
Abstract
Wheat and corn silages are widely used as ruminant feed in Israel due to their availability and cost-effectiveness. To ensure long-term preservation without compromising nutritional quality, effective methods must be employed. The inclusion of additives during harvest and ensiling can enhance efficiency and address preservation challenges. In the current study, the effects of microbial inoculum (MI) and urea on the chemical composition, amino acid profiles, aerobic stability, and in vitro digestibility of wheat and corn silages were investigated. Samples of wheat and corn were subjected to four treatments: control, MI, urea and a combination of MI + urea. The treatments were ensiled in anaerobic conditions and opened after 1, 7, 14 or 28 days. The results showed that additives improved the quality parameters of wheat and corn silages. The inclusion of MI produced the most aerobically stable silages. The inclusion of urea in silages decreased aerobic stability. Additives improved in vitro cell wall carbohydrates' digestibility in both silages and was the best when MI was combined with urea. These results imply that additives could be incorporated in silages to enhance their nutritional value, aerobic stability and digestibility. Nonetheless, increased CP content with additives was not accompanied with a parallel increase in amino acids' content in corn silage.
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Affiliation(s)
- Philip Wagali
- Department of Animal Sciences, The Robert H. Smith Faculty of Agriculture and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel
| | - Ira Pelech
- Department of Animal Sciences, The Robert H. Smith Faculty of Agriculture and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel
| | - Chris Sabastian
- Department of Animal Sciences, The Robert H. Smith Faculty of Agriculture and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel
| | - Julius Ben Ari
- The Laboratory for the Mass Spectrometry and Chromatography, Interdepartmental Analytical Unit (ZABAM), The Robert H. Smith Faculty of Agriculture and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel
| | - Haim Tagari
- Department of Animal Sciences, The Robert H. Smith Faculty of Agriculture and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel
| | - Sameer J Mabjeesh
- Department of Animal Sciences, The Robert H. Smith Faculty of Agriculture and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel
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Effects of Lactic Acid Bacteria Reducing the Content of Harmful Fungi and Mycotoxins on the Quality of Mixed Fermented Feed. Toxins (Basel) 2023; 15:toxins15030226. [PMID: 36977117 PMCID: PMC10056090 DOI: 10.3390/toxins15030226] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/13/2023] [Accepted: 03/14/2023] [Indexed: 03/19/2023] Open
Abstract
The contamination of fermented feeds and foods with fungi and mycotoxins is a major food safety issue worldwide. Certain lactic acid bacteria (LAB), generally recognized as safe (GRAS) fermentation probiotics, are able to reduce microbial and mycotoxins contamination. In this study, Lactiplantibacillus (L.) plantarum Q1-2 and L. salivarius Q27-2 with antifungal properties were screened as inoculants for mixed fermenting feed, and the fermentation and nutritional qualities, microbial community, and mycotoxins of mixed fermented feed were analyzed at different fermentation periods (1, 3, 7, 15, and 30 days, respectively). The findings indicated that the utilization of Q1-2 and Q27-2 strains in fermenting feed led to a decrease in pH and an increase in lactic acid concentration and the proportion of Lactiplantibacillus, while effectively restraining the proliferation of undesirable microorganisms. In particular, Q1-2 reduced the relative abundance of fungi including Fusarium and Aspergillus. Compared to the control group, the Q1-2 and Q27-2 groups reduced aflatoxin B1 by 34.17% and 16.57%, and deoxynivalenol by up to 90.61% and 51.03%. In short, these two LAB inoculants could reduce the contents of aflatoxin B1 and deoxynivalenol to the limited content levels stipulated by the Chinese National Standard GB 13078-2017. These findings suggest that the LAB strains of Q1-2 and Q27-2 have potential applications in the feed industry for the mitigation of mycotoxin pollution, thereby enhancing the quality of animal feed.
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