饲料中镁添加量对中华绒螯蟹幼蟹生长、体成分及抗氧化能力的影响

田文静; 魏建军; 李二超; 禹娜; 吴强强; 陈立侨

doi:10.3969/j.issn.1006-267x.2015.01.037

动物营养学报 >

2015 , Vol. 27 >Issue 1: 305 - 312

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.01.037

研究简报 Short Communications

饲料中镁添加量对中华绒螯蟹幼蟹生长、体成分及抗氧化能力的影响

田文静 ,
魏建军 ,
李二超 ,
禹娜 ,
吴强强 ,
陈立侨

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1. 华东师范大学生命科学学院, 上海 200241;
2. 通威股份有限公司, 成都 610041

收稿日期: 2014-07-01

网络出版日期: 2015-01-10

基金资助

公益性行业(农业)科研专项(201003020,201203065);国家基础研究973计划(2014CB138603);"十二五"国家科技支撑计划课题(2012BAD25B00);国家自然科学基金项目(31172422);上海市中华绒螯蟹现代农业产业技术体系建设和通威股份有限公司科技创新基金部分资助

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Effects of Magnesium Supplementation on Growth, Body Composition and Antioxidant Ability of Juvenile Chinese Mitten Crab (Eriocheir sinensis)

TIAN Wenjing ,
WEI Jianjun ,
LI Erchao ,
YU Na ,
WU Qiangqiang ,
CHEN Liqiao

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1. School of Life Sciences, East China Normal University, Shanghai 200241, China;
2. Tongwei Co., Ltd., Chengdu 610041, China

Received date: 2014-07-01

Online published: 2015-01-10

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摘要

本试验旨在研究饲料中镁添加量对中华绒螯蟹幼蟹生长、体成分及抗氧化能力的影响。在基础饲料中分别添加0、1.5、3.0、4.5、6.0和7.5 g/kg镁(L-天门冬氨酸镁形式),制成镁含量实测值分别为0.98、1.43、3.40、4.79、6.65和7.98 g/kg的6种试验饲料。选取平均体重为(2.97±0.01) g的中华绒螯蟹幼蟹900只,随机分为6个组,每组5个重复,每个重复30只幼蟹。每组幼蟹随机投喂1种试验饲料,试验期为10周。结果表明:添加3.0 g/kg镁组幼蟹的增重率、存活率和全蟹粗蛋白质含量最高,但各组间差异不显著(P>0.05)。幼蟹日摄食率、饲料系数及全蟹粗脂肪、水分和粗灰分含量各组之间亦无显著差异(P>0.05)。全蟹中镁含量随着饲料中镁添加量的升高而升高,而钙含量则在未添加镁组最高,导致此组的钙镁比最高。幼蟹肝胰腺和血清中还原型谷胱甘肽(GSH)含量随着饲料中镁添加量的升高先升高后降低,在添加3.0 g/kg镁组达到最高值,其肝胰腺中GSH含量显著高于添加7.5 g/kg镁组(P<0.05),血清中GSH含量显著高于未添加镁组(P<0.05);血清和肝胰腺中丙二醛(MDA)含量则随着饲料中镁添加量的升高先降低后升高,在添加3.0 g/kg镁组获得最低值,显著低于其他各组(P<0.05)。由此得出,以L-天门冬氨酸镁为镁源,当饲料中镁添加量为3.0~4.5 g/kg时中华绒螯蟹幼蟹的生长效果较好;以肝胰腺中GSH含量为判据,采用二次回归模型进行拟合发现,当饲料中镁添加量为3.76 g/kg(饲料中镁含量为4.39 g/kg)时,中华绒螯蟹幼蟹的抗氧化能力最佳。

关键词： 中华绒螯蟹; 镁; 生长; 体成分; 抗氧化能力

本文引用格式

田文静 , 魏建军 , 李二超 , 禹娜 , 吴强强 , 陈立侨 . 饲料中镁添加量对中华绒螯蟹幼蟹生长、体成分及抗氧化能力的影响[J]. 动物营养学报, 2015 , 27(1) : 305 -312 . DOI: 10.3969/j.issn.1006-267x.2015.01.037

Abstract

This experiment was conducted to study the effects of magnesium (Mg) supplementation on growth, body composition and antioxidant ability of juvenile Chinese mitten crab (Eriocheir sinensis). Six experimental diets were formulated with basal diet added of Mg (the form of L-aspartic acid magnesium) of 0, 1.5, 3.0, 4.5, 6.0 and 7.5 g/kg, and the measured values of dietary Mg content were 0.98, 1.43, 3.40, 4.79, 6.65 and 7.98 g/kg, respectively. A total of 900 juvenile Chinese mitten crab with the average body weight of (2.97±0.01) g were randomly allocated to 6 groups with 5 replicates per group and 30 crab per replicate, and each group was randomly fed one of six experimental diets for 10 weeks. The results showed as follows: the highest values of weight gain rate, survival ratio and crude protein content in whole-body were all found in the group with the Mg supplementation of 3.0 g/kg, but no significant differences in those indices among all groups (P>0.05). There were also no significant differences in the daily feeding rate, feed conversion ratio, and the contents of moisture, crude lipid and ash in whole-body among all groups (P>0.05). The Mg content in whole-body was increased with the Mg supplementation increasing, while the highest value of calcium (Ca) content in whole-body was appeared in the group without Mg supplementation, which lead to this group had the highest value of Ca/Mg in whole-body. The content of reduced glutathione (GSH) in hepatopancreas and serum was firstly increased and then decreased with the increase of dietary Mg supplementation, and the highest values were all found in the group with the Mg supplementation of 3.0 g/kg. The GSH content in hepatopancreas and serum in the group with the Mg supplementation of 3.0 g/kg was significantly higher than that in the group with the Mg supplementation of 7.5 g/kg and the group without Mg supplementation, respectively (P<0.05). The content of malonaldehyde (MDA) in hepatopancreas and serum was firstly decreased and then increased with the increase of dietary Mg supplementation, and the lowest values were found in the group with the Mg supplementation of 3.0 g/kg, which was significantly lower than that in the other groups (P<0.05). In conclusion, the L-aspartic acid magnesium as Mg source, the juvenile Chinese mitten crab have the better growth effect when Mg supplementation is 3.0 g/kg; the GSH content in hepatopancreas as criterion, base on the quadratic regression model fitting, the juvenile Chinese mitten crab have the best antioxidant ability when Mg supplementation is 3.76 g/kg (dietary Mg content is 4.39 g/kg).

Key words： Chinese mitten crab (Eriocheir sinensis); magnesium; growth; body composition; antioxidant ability

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