Studies on nutrients in ensiled total mixed ration contributed to microbial protein synthesis in rumen

2020 Fiscal Year Final Research Report

• Project/Area Number: 18K05943
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 42010:Animal production science-related
• Research Institution: Mie University
• Principal Investigator: Kondo Makoto 三重大学, 生物資源学研究科, 准教授 (50432175)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Keywords: サイレージ / 乳牛 / ルーメン内微生物タンパク質合成量

Outline of Final Research Achievements

The effects of ensiling of total mixed ration (TMR) on chemical composition and ruminal microbial protein synthesis in dairy cattle was evaluated. Microbial protein synthesis in rumen was not influenced in lactating dairy cattle fed ensiled TMR as compared to non-ensiled TMR. Among the compounds in ensiled TMR, starch was the main energy source to microbial protein synthesis in rumen. Soluble sugars (sucrose, fructose and glucose) were completely consumed during silage fermentation, thereby they did not contribute to the microbial protein synthesis. Mannitol was found in the ensiled TMR, but the contribution to the protein synthesis was less due to its low contents.

Free Research Field

畜産　飼料

Academic Significance and Societal Importance of the Research Achievements

乳牛用混合飼料のサイレージ発酵による炭素および窒素画分の変化とルーメン微生物のタンパク質合成に関する知見を得た。本研究をさらに発展させることで、発酵混合飼料を調製する酪農現場に対して、飼料原料の選択と配合割合の調節を的確に提案できることが期待される。