富含DHA微藻对柴达木福牛生长性能和血清抗氧化指标的影响

doi:10.16431/j.cnki.1671-7236.2021.06.020

摘要/Abstract

摘要： 本试验旨在研究富含二十二碳六烯酸（C22∶6n-3，DHA）的微藻对柴达木福牛生长性能、体尺指标、屠宰性能和血清抗氧化指标的影响。选用24头健康的24月龄柴达木福牛公牛，随机分为3组，每组8头。试验Ⅰ组（对照组）饲喂基础饲粮，试验Ⅱ和Ⅲ组在基础饲粮中分别添加100和200 g/d的微藻粉。预试期10 d，正试期42 d。测定生长性能、体尺指标、屠宰性能相关指标以及血清中总抗氧化能力（T-AOC）、超氧化物歧化酶（SOD）、谷胱甘肽过氧化物酶（GSH-Px）活性和丙二醛（MDA）含量。试验结果表明：①试验Ⅱ组平均日增重（ADG）显著高于对照组（P<0.05）；与对照组相比，试验Ⅱ和Ⅲ组的料重比（A/G）显著降低（P<0.05），饲粮添加富含DHA微藻对福牛的体尺指标和屠宰性能无显著影响（P>0.05）。②与对照组相比，饲粮中添加微藻可显著提高血清SOD活性和T-AOC （P<0.05），显著降低MDA含量（P<0.05）；试验Ⅲ组的GSH-Px活性显著提高（P<0.05）。综上，在本试验条件下，添加100 g/d富含DHA微藻可显著提高柴达木福牛的饲料转化率和血清抗氧化能力。

关键词: 柴达木福牛; 富含DHA微藻; 生长性能; 血清抗氧化指标

Abstract: The purpose of this study was to investigate the effects of adding different levels of DHA-rich microalgae to the diet on the growth performance,body measurement index,slaughter performance,and serum antioxidant indices of Qaidamford cattle.A total of 24 healthy 24-month-old Qaidamford bulls were randomly assigned to three groups with 8 cattle per group.GroupⅠ was taken as a control group and fed with basal diets.Groups Ⅱ and Ⅲ were supplemented with 100 and 200 g/d DHA-rich microalgae powder in the basic diet,respectively.The pre-experimental period lasted for 10 days,and the experimental period lasted for 42 days.Growth performance,body size indicators,slaughter performance related indicators,and total antioxidant capacity (T-AOC), superoxide dismutase (SOD),glutathione peroxidase (GSH-Px) activities and malondialdehyde (MDA) content in serum were determined.The results showed that,①Compared with the control group,the average daily gain of groupⅡ was significantly higher (P<0.05),the feed-to-weight ratio were significantly lower of groups Ⅱ and Ⅲ (P<0.05).The body size and slaughter performance had no significantly change among three groups (P>0.05) ②Serum T-AOC and SOD activitie were significantly increased (P<0.05),and the content of MDA (P<0.05) was significantly reduced by adding DHA-rich microalgae to the diet.The GSH-Px activity of group Ⅲ was significantly higher than that of the control group (P<0.05).In conclusion,adding 100 g/d of DHA-rich microalgae to the diet significantly improved the feed conversion rate and serum antioxidant capacity of Qaidamford cattle under the experimental conditions.

Key words: Qaidamford cattle; DHA-rich microalgae; growth performance; serum antioxidant index

中图分类号:

S816.7

徐晨晨, 李慧, 张寿, 张松山, 呼日, 马玉林, 孙宝忠, 谢鹏, 卢福山. 富含DHA微藻对柴达木福牛生长性能和血清抗氧化指标的影响[J]. 中国畜牧兽医, 2021, 48(6): 2074-2081.

XU Chenchen, LI Hui, ZHANG Shou, ZHANG Songshan, HU Ri, MA Yulin, SUN Baozhong, XIE Peng, LU Fushan. Effect of Dietary DHA-rich Microalgae on Growth Performance and Serum Antioxidant Indices of Qaidamford Cattle[J]. China Animal Husbandry and Veterinary Medicine, 2021, 48(6): 2074-2081.

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