|
所属 |
農学部 農学部門動植物資源生命科学領域 |
|
職名 |
准教授 |
|
関連SDGs |
|
論文 【 表示 ／ 非表示 】
-
Nishimura K., Hirabayashi H., Kawashima K., Okimura T., Suzuki A., Asakuma S., Isobe N., Obitsu T., Kushibiki S., Sugino T.
Journal of Dairy Science 108 ( 4 ) 4381 - 4389 2025年4月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Journal of Dairy Science
Medium-chain fatty acids (MCFA) are rapidly utilized by the liver as an energy source. However, the effects of feeding MCFA to dairy cows during the transition period and the subsequent effect on postpartum performance is not clear. Therefore, the objective of this study was to evaluate the effects of MCFA supplementation on feed intake, rumen fermentation, blood profile, and milk production in dairy cows during their transition period. Twenty-one multiparity Holstein cows were randomly assigned to 2 dietary groups: one group received a diet supplemented with MCFA calcium salts (MCFA-Ca) from 3 wk relative to expected parturition to 5 wk postpartum (MCFA; n = 10), and the other group received the same diet without supplements (control; n = 11). Medium-chain fatty acid calcium salts containing 80% caprylic acid and 20% capric acid were added to the mixed diet at 1.5% DM. During the close-up period (from 3 wk relative to expected parturition until parturition), cows were fed a TMR with restricted intake to provide 100% of the metabolic energy requirement. Subsequently, the cows were fed a TMR ad libitum from parturition to 5 wk postpartum. Dry matter intake and BW did not differ throughout the experimental period between groups. Rumen fermentation and protozoa counts remained unaffected during the experimental period. Supplementation of MCFA had no effect on the plasma concentrations of nonesterified fatty acids and total ketone bodies in cows throughout the experimental period. Conversely, postpartum plasma glucagon concentration was higher in the MCFA group than in the control group, and milk yield tended to increase in the MCFA group. In conclusion, our results suggested that MCFA-Ca supplementation enhances the catabolic state by affecting pancreatic hormone secretion, resulting in an increase in milk yield during the fresh period without an excessive negative energy balance in dairy cows.
-
初産牛における乾乳期短縮時の栄養強化が産乳と繁殖性に及ぼす影響 査読あり
大澤玲, 眞鍋典義, 宮本剛志, 高松英里奈, 佐沢公子, 森川繁樹, 西村慶子, 高橋優希, 真貝拓三, 伊藤文彰, 野中最子, 田鎖直澄
家畜衛生学雑誌 50 ( 4 ) 253 - 263 2025年3月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
-
Nishimura K., Terada F.
Animal Science Journal 96 ( 1 ) e70116 2025年1月
担当区分：筆頭著者, 責任著者 掲載種別：研究論文（学術雑誌） 出版者・発行元：Animal Science Journal
This study aimed to evaluate the effects of a fermented total mixed ration (TMR) on feed intake, digestibility, rumen fermentation, and milk production in dairy cows in a hot environment. The experiment was conducted twice, with four multiparous Holstein cows used in each trial. Fresh and fermented TMR were used as dietary treatments in a crossover experimental design. Fresh and fermented TMR had the same diet composition. Fresh TMR was prepared every morning. Fermented TMR was prepared by baling fresh TMR and sealing it with a bale wrapper, followed by storage outdoors. Dry matter intake and digestibility did not differ between groups. Cows fed fermented TMR showed increased intake and digestibility of crude protein and non-fiber carbohydrate. Rumen total volatile fatty acids and propionate concentration were higher in cows fed fermented TMR than in those fed fresh TMR. Milk yield tended to increase in the cows fed fermented TMR. These results indicated that feeding fermented TMR to dairy cows in a hot environment altered feed digestibility and rumen fermentation and increased milk production. Therefore, fermented TMR is a suitable feed for lactating cows in a hot environment and is an effective technology for heat management.
DOI： 10.1111/asj.70116
-
初産牛の乾乳期短縮が産乳と繁殖性に及ぼす影響 査読あり
大澤玲, 福井陽士, 榊原裕二, 慎鍋典義, 岩本智恵子, 高松英里奈, 佐沢公子, 森川繁, 秋好佑紀, 西村慶子, 三宅 歩, 佐藤 精, 高橋優希, 宮腰雄ー, 永墓訓明, 真貝拓三, 伊藤文彰, 野中最子, 田鎖直澄
家畜衛生学雑誌 49 ( 4 ) 189 - 198 2024年
記述言語：日本語 掲載種別：研究論文（学術雑誌）
-
Inabu Y., Kurosu K., Osawa R., Hasunuma T., Tsuji N., Funo H., Nishimura K., Kushibiki S., Kawashima K., Sugino T.
Journal of Dairy Science 106 ( 6 ) 4443 - 4453 2023年6月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Journal of Dairy Science
Kraft pulp (KP), an intermediate product obtained when wood chips are converted to paper, contains highly digestible fiber. This study evaluated the effect of KP inclusion in calf starters on growth performance, health, and plasma glucagon-like peptide 2 (GLP-2) concentration in calves. Twenty-five Holstein heifer calves were raised on a high plane of nutrition program using milk replacer containing 29% crude protein and 18% fat until 49 d after birth, and were fed calf starters containing KP at 0 (CON; n = 14) or 12% (KPS; n = 11) on a dry matter basis. All calves were fed the treatment calf starters and timothy hay ad libitum. Blood was collected at 4, 14, 21, 35, 49, 70, and 91 d after birth. Dry matter intake (DMI) of milk replacer and hay was not affected by treatment, whereas calf starter DMI was lower for KPS (0.93 kg/d) than for CON (1.03 kg/d). Higher neutral detergent fiber (NDF) content in KPS (31.7%) than in the CON starter (22.1%) resulted in higher NDF intake for KPS (0.55 kg/d) than for CON (0.47 kg/d). However, the consumption of starch was lower for KPS (0.29 kg/d) than for CON (0.33 kg/d). Despite the lower starter intake for KPS, body weight and average daily gain did not differ between treatments. No significant difference was observed in the plasma concentrations of metabolites, except for β-hydroxybutyrate (BHB); BHB concentration was lower for KPS (216 μmol/L) than for CON (257 μmol/L). The area under the curve for plasma GLP-2 concentration was higher for KPS (54.1 ng/mL × d) than for CON (36.0 ng/mL × d). Additionally, the fecal score postweaning (1.19 and 1.48 for KPS and CON, respectively) and the number of days that calves developed diarrhea throughout the experimental period (2.50 d and 8.10 d for KPS and CON, respectively) were lower for KPS than for CON. These results indicate that feeding KP reduces the severity and frequency of diarrhea without adversely affecting growth performance. This could be attributed to the increased plasma GLP-2 concentration induced by higher NDF intake.