Jing Xu, Gangfu Chen, Min Wu, Qihui Yang, Hua-Tao Li
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引用次数: 0
摘要
以黄芪的石油醚浸出物、乙酸乙酯浸出物、丙酮浸出物(AE)和水浸出物为原料,对亚油酸和亚麻酸进行培养。测定了黄芪提取物的酚类物质含量和总抗氧化能力。结果表明,EAms降低了上述材料中丙二醛、共轭二烯和过氧化值的水平。在所有eam中,AE对T-AOC和脂质氧化的抑制作用最强。然后,用AE分级孵育鱼饲料。结果表明,AE能抑制鱼饲料中的脂质氧化。降低脂质氧化的适宜投加量为6.74 g AE kg - 1饲料。eam对脂质氧化的影响可能与其酚类含量密切相关。分别饲喂AE水平为0.0、1.0、2.0、3.0、4.0、5.0、6.0和7.0 g kg−1的饲料,饲喂饲料60 d。目前的数据显示,饲料中AE提高了鱼的生长性能。促进生长的最佳投加量为5.15 g AE kg−1日粮。AE的这一结果可能与其对鱼类消化器官中消化吸收酶活性和抗氧化能力的增强有关。我们目前的研究表明,EAm有望成为鱼类及其饲料的天然抗氧化剂。
The Extract of Astragalus membranaceus Inhibits Lipid Oxidation in Fish Feed and Enhances Growth Performance and Antioxidant Capacity in Jian Carp (Cyprinus carpio var. Jian)
In this study, a linoleic and linolenic acid were incubated with petroleum ether extract, ethyl acetate extract, acetone extract (AE) and aqueous extract of Astragalus membranaceus. The phenolic content and total antioxidant capacity (T-AOC) were determined in the extracts of Astragalus membranaceus (EAms) above. Results showed that EAms decreased the levels of malonaldehyde, conjugated diene, and peroxide value levels in material above. Of all of EAms, AE showed the strongest T-AOC and inhibitory effect on the lipid oxidation. Next, fish feeds were incubated with graded levels of AE. The results showed that AE inhibited lipid oxidation in fish feed. The appropriate dosage for reducing lipid oxidation was 6.74 g AE kg−1 feeds. The effect of EAms on the lipid oxidation may be closely associated with their phenolic content. Then, juvenile Jian carp (Cyprinus carpio var. Jian, 10.2 ± 0.3 g) were fed with diets containing graded levels of AE (0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, and 7.0 g kg−1) for 60 days. Current data displayed that dietary AE increased the growth performance of fish. The optimum dosage for growth promotion was 5.15 g AE kg−1 diet. This result of AE may be ascribed to its enhancing effect on the activity of digestive and absorptive enzymes and antioxidant capacity in digestive organs of fish. Our present study indicated that EAm holds promise as a natural antioxidant for fish and their feed.