2022 Fiscal Year Final Research Report
Development of nutritional function of native plant resources by analysis of intra-ruminal environment and rumen digestion
| Project/Area Number |
20K06358
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 42010:Animal production science-related
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 放牧牛 / 植物種多様性 / 採食植物 / ルーメン / 微生物群集構造 / 消化機能 |
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| Outline of Final Research Achievements |
The effects of plant species diversity of the diet of grazing animals on the bacterial community in the rumen and ruminal digestive function were examined. Plant species foraged by grazing cows in a mountainous grazing area with diverse plant species were more diverse in both early summer and fall than in a grass pasture. Bacterial community structure in the rumen differed between the pastures in both seasons, with higher diversity in the solid part in early summer and fall, and in the liquid part in fall, in the mountain pastures. In vitro digestion experiments showed that digestibility of tree leaves was higher in mountain pastures in early summer, and more cellulolytic bacteria were detected. In addition, the bacterial flora after incubation differed among pastures. These findings suggest that differences in rumen bacterial community structure associated with differences in diversity of the diet of grazing cows may influence rumen digestive function.
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| Free Research Field |
草地学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究により、植物群落における植物種の多様性→放牧反すう家畜の採食植物種の多様性→ルーメン内微生物叢の多様性との関係性が明らかとなり、さらにルーメン内消化機能の向上（樹葉の消化性向上）が示唆される結果を得た。日本は植物資源が豊富であるが、一方で中山間地域を中心に耕作放棄地や管理放棄地が増加しており、その再活用と産業の活性化が急務である。本成果は、これらの放棄地をウシ等の草食家畜の放牧によって省力的かつ低コストで利用することを推進するものであり、将来これらの放棄地の管理と農畜林業の活性化に貢献すると考えられる。
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