Effects of peripartum β-carotene supplementation on serum vitamin concentrations and passive immunity in Japanese Black cattle
| Jazyk: | angličtina |
|---|---|
| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | 宮崎大学農学部研究報告 = Bulletin of the Faculty of Agriculture, University of Miyazaki. 57:87-92 |
| ISSN: | 0544-6066 |
| Popis: | The effects of peripartum supplementation with β-carotene on serum vitamin concentrations and passive immunity were assessed in Japanese Black cattle. Nineteen pregnant cows were assigned to supplemented (n=10) or control (n=9) group. Supplemented cows received 300 mg of β-carotene once daily from 4 weeks prepartum through 4 weeks postpartum. All cows were immunized twice with enterotoxigenic E. coli vaccine at 8 and 4 weeks before calving. Serum β-carotene concentrations in supplemented cows increased up to calving (P 分娩前後におけるβ-カロテン補給が, 黒毛和種牛の血清ビタミン濃度および受動免疫に及ぼす影響について調べた. 19頭の妊娠雌牛を補給群(n=10)または対照群(n=9)に分けた. 補給群は分娩4週間前より分娩4週間後まで, 1日1回300mgのβ-カロテンが与えられた. 全ての雌牛に分娩8および4週間前の2回, 毒素原性大腸菌ワクチンが接種された. 補給群の血清β-カロテン濃度は分娩時にかけて上昇し(P |
| Databáze: | OpenAIRE |
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