Sunflower cake versus soybean meal and alfalfa for nitrogen utilization when crude protein and non-fiber carbohydrate levels are equivalent

Chunyan Liu, Sanae Asano, Nae Ishii, Takuma Kashimura, Keita Niimi, Takuya Nomizo, Youichi Numata, Kei Takahashi, Hiroshi Kajikawa

研究成果: ジャーナルへの寄稿記事査読

1 被引用数 (Scopus)

抄録

The reported efficiency of N usage by sunflower cake (SFC) was inferior to that of soybean meal (SBM) in a study in which the non-fiber carbohydrate (NFC) content was lower in the SFC diet. Here, we adjusted crude protein (CP) and NFC levels to near-equivalence among three diets containing SFC or SBM for four non-lactating Holstein cows. Alfalfa hay was also added to the comparison. The results demonstrated that the total digestible nutrient contents were not significantly different among the diets. Intake N, fecal N, absorbed N, urinary N, and retained N did not differ significantly among the diets. The efficiency of N usage in the body (retained N/absorbed N) did not differ significantly among the diets. No between-diet difference was observed in the protein- and energy-related ruminal and blood properties, including the estimated microbial protein synthesis in the rumen. These results suggest that regardless of the quality and balance of amino acids in a feed, the efficiency of N usage can be improved by a supply of digestible carbohydrates, which leads to an increase in ruminal microbial protein.

本文言語英語
論文番号e13881
ジャーナルAnimal Science Journal
94
1
DOI
出版ステータス出版済み - 1 1月 2023

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