A comparison of buffered propionic acid and
&lt;i&gt;Propionibacterium acidipropionici&lt;/i&gt; as additives for
high oil maize stover silage

Dong, Xianwen; Meng, Qingxiang; Xiong, Y. Q.

doi:10.22358/jafs/66939/2006

J. Anim. Feed Sci.

2006

DOI: 10.22358/jafs/66939/2006

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A comparison of buffered propionic acid and <i>Propionibacterium acidipropionici</i> as additives for high oil maize stover silage

Xianwen Dong¹,

Qingxiang Meng²,

Y. Q. Xiong³

Abstract: High oil maize stover upon removal of ears was ensiled in 3 L volume glass jars for 1, 3, 6, 9 weeks to investigate the effects of buffered propionic acid and propionic acid bacteria on fermentation and aerobic stability of the silage. Treatments were: 1. control (no additives added), 2. buffered propionic acid added at 5 L/t fresh high oil maize stovers, and 3. propionic acid bacteria from Propionibacterium acidipropionici added at 10 5 cfu/g of fresh high oil maize stovers. The addition of buffered propionic… Show more

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Investigation of fermentation profiles, bacterial community structure and bacterial β-carotene synthesis of alfalfa silage treated with propionic acid or its combination with squalene

Zong,

Jiang,

Shao

et al. 2024

J. Agric. Sci.

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This study examined the fermentation dynamics, bacterial community composition and bacterial β-carotene synthesis in alfalfa that was ensiled for 3, 15, 45 and 90 days without additives (CON), or with a chemical agent (propionic acid, PA); or a combination of PA and squalene, SQPA). The results showed that silage treated with PA had a lower (P < 0.01) pH value than the CON silage in the early ensiling phase (3–15 days). Meanwhile, silage treated with PA had the highest contents of lactic acid, acetic acid and PA after 90 days of ensiling (P < 0.01). The β-carotene in alfalfa was lost seriously in the initial ensiling phase (3 days) and epiphytic Pantoea agglomerans with the ability to produce β-carotene became extinct. With the extension of ensiling time, the loss of β-carotene was alleviated in all silages. PA and SQPA not only lowered bacterial diversity and simplified bacterial networks but also facilitated the emergence of new β-carotene-producing bacteria. The metabolic function prediction indicated that β-carotene synthesis tended to decrease initially and subsequently increase during ensiling. Furthermore, the variance of enzymes involved in the bacterial synthesis of β-carotene in silages was influenced by PA, SQPA and ensiling time. In summary, the impact of solely adding PA demonstrated superior effects on the fermentation quality of alfalfa silage compared to the effects observed with SQPA. Throughout the ensiling of alfalfa, the succession of different β-carotene-producing bacteria resulted in fluctuations in the levels of β-carotene.

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Investigation of fermentation profiles, bacterial community structure and bacterial β-carotene synthesis of alfalfa silage treated with propionic acid or its combination with squalene

Zong,

Jiang,

Shao

et al. 2024

J. Agric. Sci.

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Dynamics associated with fermentation and aerobic deterioration of high-moisture Italian ryegrass silage made using Lactobacillus plantarum and caproic acid

Dong,

Lin,

Dai

et al. 2023

Journal of Applied Microbiology

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Aims To determine fermentation quality, aerobic stability and chemical composition of Italian ryegrass (IR) silage prepared with Lactobacillus plantarum (LP), caproic acid (CA) and their combination during ensiling and feed-out phase. Methods and results 6 treatments: control (CON), Lactobacillus plantarum (LP), 0.15% caproic acid (LCA), 0.2% caproic acid (HCA), LCA + LP, and HCA + LP were employed for 30 days ensiling and an 8-days aerobic stability test. LP had similar pH value and lactic acid content with LCA + LP, while the contents of NH3-N and total VFAs in LCA + LP were significantly lower than those in LP and CON, and the fermentation quality of LCA + LP performed best among all silages. As air-exposure extended, contents of WSC, lactic and acetic acids decreased, while pH and NH3-N content increased significantly. The population of lactic acid bacteria gradually decreased in contrast to increased counts of aerobic bacteria and yeasts. Compared with LCA, 0.2% caproic acid delayed the aerobic deterioration as judged by a slower increase in pH and high residual of WSC and lactic acid, and negligible ethanol content and anaerobe spores counts remained in HCA at the end of air exposure. Compared with CON (73 h), LP showed less aerobic stability (38 h), whereas HCA and HCA + LP prolonged aerobic stability for 210 and 152 h, better than LCA (109 h) and LCA + LP (146 h). Conclusions Lactobacillus plantarum apparently improved the fermentation quality, and combined with caproic acid exhibited greater efficiency in inhibiting undesirable microorganism during ensiling. Caproic acid at 0.2% optimally extended the aerobic stability.

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A comparison of buffered propionic acid and <i>Propionibacterium acidipropionici</i> as additives for high oil maize stover silage

Cited by 2 publications

References 17 publications

Investigation of fermentation profiles, bacterial community structure and bacterial β-carotene synthesis of alfalfa silage treated with propionic acid or its combination with squalene

Investigation of fermentation profiles, bacterial community structure and bacterial β-carotene synthesis of alfalfa silage treated with propionic acid or its combination with squalene

Dynamics associated with fermentation and aerobic deterioration of high-moisture Italian ryegrass silage made using Lactobacillus plantarum and caproic acid

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