【摘 要】
：
试验在海南和牛日粮中添加不同水平的维生素A,研究其对海南和牛血液生化指标和抗氧化性的影响.选体重和胎次相近的海南和牛12头,随机分为4个处理组,每个处理组设3个重复,每个
【机 构】
：
海南省农业科学院畜牧兽医研究所,海南省热带动物繁育与疫病研究重点实验室,海南省畜牧技术推广站
论文部分内容阅读
试验在海南和牛日粮中添加不同水平的维生素A,研究其对海南和牛血液生化指标和抗氧化性的影响.选体重和胎次相近的海南和牛12头,随机分为4个处理组,每个处理组设3个重复,每个重复1头牛,对照组饲喂干稻草基础日粮,试验组在对照组日粮基础上分别添加2500、5000、7500 IU/kg维生素A,试验期为40 d.结果表明:①维生素A的添加水平对海南和牛的血清抗氧化性指标的影响差异不显著(P＞0.05),但随着日粮中维生素A添加水平的提高,海南和牛的血清抗氧化能力逐渐增强；②维生素A的添加水平可显著提高血液中葡萄糖的含量(P＜0.05),同时随着维生素A添加水平的提高还可以提高血液中一些关键酶的活性(P＞0.05).因此,日粮中添加维生素A可以提高海南和牛血液中一些关键酶的活性和血清的抗氧化能力,并以添加7500 IU/kg组效果最好.
其他文献
Three kinds of poly amino acids, poly-γ-glutamic acid, poly(ε-L-lysine) and multi-L-arginyl-poly (L-aspartic acid) can be synthesized by enzymatic process ind
DNA G-quadruplexes(G4s)are believed to be involved in many biological processes,including the gene expression regulation and the maintenance of telomere.However
A wing specific F 1 genetic screen was carried out using the powerful Drosophila genetic system, combined with yeast FRT/FLP and GAL4/UAS system. Form the wing
CYC-like genes are widely conserved in controlling floral dorsoventral asymmetry (zygomorphy) through persistent expression in corresponding domains in core eud
Two Orthotrichum species of the subgenus Orthophyllum were compared with other representatives of this genus using internally transcribed spacer regions 1 and 2
The seed morphology of nine taxa of Juncus from Egypt has been investigated using light and scanning electron microscopy, to determine the importance of seed co
Pugionium (Brassicaceae) is a small genus that occurs in central Asian deserts. The interspecific delimitation and taxonomic treatments of this genus are disput
以秦岭南坡红桦林为研究对象，利用标准地调查获得林分、地形、土壤和植被相关数据，分析红桦林土壤有机碳质量分数空间分异特征及其与林分因子和地形因子间的关系。结果表明：秦岭
Leibnitzia comprises six species of perennial herbs that are adapted to high elevation conditions and is one of only two Asteraceae genera known to have an excl
The origin of morphological and ecological novelties is a long-standing problem in evolutionary biology. Understanding these processes requires investigation fr