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Studies on the Methane-Mitigating Potential of Rice Bran, Organic Acids and their Combination
http://hdl.handle.net/10076/0002001492
http://hdl.handle.net/10076/00020014925d9a6cfb-39cc-4691-94b7-bcd62ceeb574
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
2024DB0306.pdf (783 KB)
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| アイテムタイプ | 学位論文 / Thesis or Dissertation(1) | |||||||
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| 公開日 | 2025-06-05 | |||||||
| タイトル | ||||||||
| タイトル | Studies on the Methane-Mitigating Potential of Rice Bran, Organic Acids and their Combination | |||||||
| 言語 | en | |||||||
| 言語 | ||||||||
| 言語 | eng | |||||||
| 資源タイプ | ||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_db06 | |||||||
| 資源タイプ | doctoral thesis | |||||||
| アクセス権 | ||||||||
| アクセス権 | open access | |||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||
| 著者 |
Manlapig, De Guzman Jamal James
× Manlapig, De Guzman Jamal James
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| 著者（ヨミ） | ||||||||
| 姓名 | マンラピッグ, デ グズマン ジャマル ジェイムズ | |||||||
| 言語 | ja | |||||||
| 抄録 | ||||||||
| 内容記述タイプ | Abstract | |||||||
| 内容記述 | Methane, produced as a byproduct of microbial fermentation in the digestive systems of ruminant animals, contributes notably to global greenhouse gas emissions and represents a loss of dietary energy. Thus, methane production in the rumen is problematic in terms of both production efficiency and environmental effects. This study aimed to evaluate the impact of rice bran and organic acids on fermentation characteristics and methane (CH4) production in a series of in vitro experiments. The first study assessed lactic acid bacteria (LAB) isolated from horse feces as an inoculant for solid-state fermentation (SSF) of rice bran and its effect on nutrient composition and organic acid production. SSF improved the crude protein, ether extract, ash, crude fiber, neutral detergent fiber, and acid detergent fiber compared to unfermented rice bran (P< 0.05). The lactate and total organic acid produced were increased by the addition of LAB (P< 0.01), and the highest concentrations were recorded in fermented rice bran (FRB) containing Ligilactobacillus equi (T2 and T3). The study found that combining LAB from horse feces with SSF improves the quality of RB as an animal feed ingredient by increasing protein, carbohydrate, mineral, and organic acid levels. The second study assessed the effect of FRB on rumen fermentation using an in vitro system. The results revealed that both RB and FRB (with or without L. equi) significantly reduced gas, methane (CH4), CH4 per dry matter digested (CH4/DDM), anaerobic fungi, and Fibrobacter succinogenes populations (P< 0.001). Total short-chained fatty acids (SCFA) were also reduced in RB and FRB without L. equi compared to control (P< 0.001). Propionate proportion was increased while butyrate proportion was reduced in response to treatment addition in cultures (P< 0.001). Overall, RB and FRB supplementation can be used to decrease CH4 production in vitro. The third study was done to elucidate which component of rice bran is involved in the inhibition of CH4. The addition of ethanol-soluble fraction (ESF) significantly decreased CH4, CH4/DDM, and methanogen population (P< 0.05), although gas and dry matter digestibility (DMD) remained comparable to the control group. The addition of ethanol and ESF reduced total short-chain fatty acids (SCFA) and propionate while increasing butyrate (P< 0.05). Supplementing 10% ESF can significantly reduce CH4generation by directly inhibiting the methanogen population without affecting substrate digestibility. The last study was focused on the combination of acrylate (AA) and pyruvate (PA) with rice bran and its effect on methane. The addition of acrylate reduced gas, CH4, and CH4/DDM (P<0.01). Conversely, acrylate and pyruvate addition increased the total organic acid and lactate production while decreasing acetate and propionate produced compared to the control (P<0.01). Populations of anaerobic fungi and M. elsdenii were reduced in AA and PA, while methanogen, Selenomonas ruminantium, and Prevotella ruminicola were only reduced in AA (P<0.01). These results showed that the addition of organic acids can be used to reduce CH4 by increasing lactate production. Based on the results of these studies, rice bran could be used directly in the diet or its extract to reduce CH4 production in vitro. Moreover, supplementation of organic acid with rice bran can also yield a substantial reduction in CH4, however further study should be conducted to maximize their efficacy. |
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| 言語 | en | |||||||
| 内容記述 | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | 本文/Graduate School of Bioresources Mie University | |||||||
| 内容記述 | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | 120p | |||||||
| 書誌情報 |
発行日 2025-03-25 |
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| フォーマット | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | application/pdf | |||||||
| 著者版フラグ | ||||||||
| 出版タイプ | VoR | |||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||
| その他の言語のタイトル | ||||||||
| その他のタイトル | 米ぬか，有機酸およびそれらの組合せによるメタン抑制能に関する研究 | |||||||
| 言語 | ja | |||||||
| 出版者 | ||||||||
| 出版者 | 三重大学 | |||||||
| 出版者（ヨミ） | ||||||||
| 値 | ミエダイガク | |||||||
| 学位名 | ||||||||
| 学位名 | 博士(学術) | |||||||
| 学位授与機関 | ||||||||
| 学位授与機関識別子Scheme | kakenhi | |||||||
| 学位授与機関識別子 | 14101 | |||||||
| 学位授与機関名 | 三重大学 | |||||||
| 学位授与年月日 | ||||||||
| 学位授与年月日 | 2025-03-25 | |||||||
| 学位授与番号 | ||||||||
| 学位授与番号 | 甲学術第2325号 | |||||||
| 資源タイプ（三重大） | ||||||||
| 値 | Doctoral Dissertation / 博士論文 | |||||||
