Effects of rumen-protected methionine on milk production in early lactation dairy cattle fed with a diet containing 14.5% crude protein
Autor: | Hikari Shinohara, Mitsunori Kurihara, Makoto Seki, Say Sato, Terumi Kuraisi, Hideto Nishiki, Tetsuo Tamura, Yoshihiro Ookubo, Hiroshi Kajikawa, Kazuhiro Akutsu, Masafumi Sakata, Kazunori Inoue, Kouichi Saitou, Teruaki Koga |
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Rok vydání: | 2018 |
Předmět: |
Nitrogen balance
Rumen rumen‐protected methionine Ice calving Biology 03 medical and health sciences chemistry.chemical_compound Methionine Animal science crude protein Lactation medicine Animals Dry matter Dairy cattle 030304 developmental biology 0303 health sciences metabolizable methionine dairy cow Nutritional Requirements 0402 animal and dairy science food and beverages 04 agricultural and veterinary sciences General Medicine Animal Feed 040201 dairy & animal science Diet Milk medicine.anatomical_structure chemistry Dietary Supplements Original Article Animal Nutritional Physiological Phenomena Cattle Female Composition (visual arts) Dietary Proteins ORIGINAL ARTICLES Corrigendum General Agricultural and Biological Sciences Nutrition/Feeds/Feeding (Ruminants) |
Zdroj: | Animal Science Journal = Nihon Chikusan Gakkaiho |
ISSN: | 1344-3941 |
DOI: | 10.1111/asj.13123 |
Popis: | We evaluated the influence on milk production of feeding early lactation cows a diet that included 14.5% crude protein (CP) and that did not meet methionine (Met) requirements or that met them by supplying rumen‐protected Met (RPMet). Thirty‐nine multiparous Holstein cows were allocated into two groups. For 15 weeks after calving, each group was fed one of the two total mixed rations, Control (n = 20) or Treatment (n = 19). The Treatment group received added RPMet at 0.034% (8 g/day) of the Control diet on dry matter basis. The adequacies of Met for the Control and Treatment groups were 96% and 106%, respectively, and for other amino acids, >110%. The CP level (14.5%) was 1 percentage point lower than that recommended by the Japanese Feeding Standard (2006). No between‐group differences were found in milk yield (40 kg/day), milk composition, plasma profile, rumen fermentation, nitrogen balance, or cow health. Met intake and the amount of rumen‐undegradable feed Met were higher in the Treatment group (p |
Databáze: | OpenAIRE |
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