评估热应激下饲喂足量或高浓度日粮维生素 D3、维生素 E、钙和硒的荷斯坦奶牛血浆生物素、叶酸和维生素 B12 的浓度

IF 1.2 4区农林科学 Q3 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Canadian Journal of Animal Science Pub Date : 2024-04-12 DOI:10.1139/cjas-2023-0115

Mélissa Duplessis, A. Ruiz-González, D. E. Rico

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引用次数: 0

摘要

本研究旨在测定在热应激（HS）条件下饲喂足量或高浓度维生素 D3（VITD）和 E（VITE）、Ca 和 Se 的多胎奶牛的血浆生物素（B8）、叶酸（B9）和维生素 B12（B12）浓度。12 头多胎荷斯坦奶牛采用分小区设计。主小区为：1）充足的 VITE 和 Se；2）高 VITE 和 Se。在每个主小区中，奶牛被分配到不同的处理中：1）含有充足浓度 VITD 和 Ca 的 HS；2）含有高浓度 VITD 和 Ca 的 HS；3）在重复的 3 x 3 拉丁正方形中，与含有充足浓度 VITD 和 Ca 的 HS 配对饲喂 (PF)。处理对血浆 B8 和 B12 没有影响。具有充足 VITD 和 Ca 的 HS 比 PF 奶牛的血浆 B9 低 21%。结果表明，无论采用哪种治疗方法，HS 都可能改变奶牛的叶酸状况。

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Evaluation of plasma biotin, folate, and vitamin B12 concentrations of Holstein dairy cows fed adequate or high concentrations of dietary vitamin D3, vitamin E, calcium, and selenium under heat stress

The aim of this study was to determine plasma biotin (B8), folate (B9), and vitamin B12 (B12) concentrations of multiparous dairy cows under heat stress (HS) fed with adequate or high concentrations of vitamin D3 (VITD) and E (VITE), Ca, and Se. Twelve multiparous Holstein cows were used in a split-plot design. The main plot was: 1) Adequate VITE and Se; 2) High VITE and Se. Within each main plot, cows were assigned to treatments: 1) HS with adequate concentrations of VITD and Ca; 2) HS with high concentrations of VITD and Ca; 3) pair-feeding (PF) with HS in thermoneutrality with adequate concentrations of VITD and Ca in a duplicated 3 x 3 Latin square. There were no treatment effects on plasma B8 and B12. Plasma B9 was lower by 21% for HS with adequate VITD and Ca than PF cows. Results suggested that HS might modify folate status in dairy cows, regardless of treatments.

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来源期刊

Canadian Journal of Animal Science 农林科学-奶制品与动物科学

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： Published since 1957, this quarterly journal contains new research on all aspects of animal agriculture and animal products, including breeding and genetics; cellular and molecular biology; growth and development; meat science; modelling animal systems; physiology and endocrinology; ruminant nutrition; non-ruminant nutrition; and welfare, behaviour, and management. It also publishes reviews, letters to the editor, abstracts of technical papers presented at the annual meeting of the Canadian Society of Animal Science, and occasionally conference proceedings.