1
|
Okoye CO, Wu Y, Wang Y, Gao L, Li X, Jiang J. Fermentation profile, aerobic stability, and microbial community dynamics of corn straw ensiled with Lactobacillus buchneri PC-C1 and Lactobacillus plantarum PC1-1. Microbiol Res 2023; 270:127329. [PMID: 36812838 DOI: 10.1016/j.micres.2023.127329] [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: 10/31/2022] [Revised: 01/23/2023] [Accepted: 02/09/2023] [Indexed: 02/16/2023]
Abstract
Corn straw is suitable for preservation as silage despite being neglected due to its varying chemical composition, yield, and pathogenic influence during ensiling. This study examined the effects of beneficial organic acid-producing lactic acid bacteria (LAB), including Lactobacillus buchneri (Lb), L. plantarum (Lp), or their combination (LpLb), on fermentation profile, aerobic stability, and microbial community dynamics of corn straw harvested at late maturity stage after 7d, 14d, 30d, and 60d of ensiling. Higher levels of beneficial organic acids, LAB counts, and crude protein (CP), and lower levels of pH and ammonia nitrogen were detected in LpLb-treated silages after 60d. Lactobacillus, Candida, and Issatchenkia abundances were higher (P < 0.05) in Lb and LpLb-treated corn straw silages after 30d and 60d ensiling. Additionally, the positive correlation between Lactobacillus, Lactococcus and Pediococcus, and the negative correlation with Acinetobacter in LpLb-treated silages after 60d emphasizes a potent interaction mechanism initiated by organic acid and composite metabolite production to reduce pathogenic microorganisms' growth. Also, a significant correlation between Lb and LpLb-treated silages with CP and neutral detergent fiber after 60d further highlights the synergistic effect of incorporating L. buchneri and L. plantarum for improved nutritional components of mature silages. The combination of L. buchneri and L. plantarum improved aerobic stability, fermentation quality, and bacterial community and reduced fungal population after 60d of ensiling, which are properties of well-preserved corn straw.
Collapse
Affiliation(s)
- Charles Obinwanne Okoye
- Biofuels Institute, Jiangsu University, Zhenjiang 212013, China; School of Environment & Safety Engineering, Jiangsu University, Zhenjiang 212013, China; Department of Zoology & Environmental Biology, University of Nigeria, Nsukka 410001, Nigeria
| | - Yanfang Wu
- Biofuels Institute, Jiangsu University, Zhenjiang 212013, China; School of Environment & Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Yongli Wang
- Biofuels Institute, Jiangsu University, Zhenjiang 212013, China; School of Environment & Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Lu Gao
- Biofuels Institute, Jiangsu University, Zhenjiang 212013, China; School of Environment & Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Xia Li
- Biofuels Institute, Jiangsu University, Zhenjiang 212013, China; School of Environment & Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Jianxiong Jiang
- Biofuels Institute, Jiangsu University, Zhenjiang 212013, China; School of Environment & Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
| |
Collapse
|
2
|
Kholif AE, Gouda GA, Patra AK. The sustainable mitigation of in vitro ruminal biogas emissions by ensiling date palm leaves and rice straw with lactic acid bacteria and Pleurotus ostreatus for cleaner livestock production. J Appl Microbiol 2021; 132:2925-2939. [PMID: 34967069 DOI: 10.1111/jam.15432] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Accepted: 12/27/2021] [Indexed: 11/30/2022]
Abstract
AIMS The sustainable utilization of date palm leaves (DPL) and rice straw (RS) as feed materials for ruminant was evaluated using an in vitro wireless gas production technique. METHODS AND RESULTS Date palm leaves and RS were individually ensiled with lactic acid bacteria (LAB) for 45 d or used as substrates for the cultivation of Pleurotus ostreatus (PO) mushroom for 35 d. A total mixed ration was formulated as a control ration. In the other rations, berseem hay replaced DPL (ensiled without additives or ensiled with lactic acid bacteria or PO) at 25, 50, 75 and 100%. Ensiling with LAB did not affect the chemical composition of DPL or RS, while PO treatment reduced their fiber fractions contents. Ensiling without additives lowered (P<0.05) the asymptotic production of total gas, methane (CH4 ) and carbon dioxide (CO2 ), and the rate of CH4 and CO2 while increasing (P<0.05) the lag time of CH4 and CO2 production. Ensiling of materials with LAB and treatment with PO decreased (P<0.05) the asymptotic production of total gas, CH4 and CO2 production and decreased the rate of CH4 and CO2 production. Ensiling without additives decreased (P<0.05) total bacterial count, and increased (P<0.05) fermentation pH and total volatile fatty acids (VFA), while LAB ensiled DPL increased (P<0.05) total VFA and propionate concentrations and decreased total protozoal count. The PO treated DPL decreased (P<0.05) bacterial count, protozoal count and fermentation pH and increased total VFA production. CONCLUSIONS Replacing berseem hay with LAB or PO treated DPL at 25% increased gas production; however, increased CH4 and CO2 production, while the other replacement levels decreased total gas, CH4 and CO2 production. The treatment with LAB is more recommended than the PO treatment.
Collapse
Affiliation(s)
- Ahmed E Kholif
- Dairy Science Department, National Research Centre, 33 Bohouth St. Dokki, Giza, Egypt
| | - Gouda A Gouda
- Dairy Science Department, National Research Centre, 33 Bohouth St. Dokki, Giza, Egypt
| | - Amlan K Patra
- Department of Animal Nutrition, West Bengal University of Animal and Fishery Sciences, 37 K.B. Sarani, Kolkata, India
| |
Collapse
|