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饲料糖脂比对拟穴青蟹仔蟹生长性能、体组成和消化酶活性的影响

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  • 广西壮族自治区海洋研究所, 广西海洋生物技术重点实验室, 北海 536000
董兰芳(1987-),女,浙江金华人,助理研究员,硕士,研究方向为水产动物营养与饲料研究。E-mail:0xiao0dong0@163.com

收稿日期: 2016-09-06

  网络出版日期: 2017-03-09

基金资助

广西科学研究与技术开发计划(桂科合14125008-2-20,2015DD25040,2015ED27014);广西自然科学基金项目(2013GXNSFAA019105);广西科学院基本科研业务费(15YJ22HYS15)

Effects of Dietary Carbohydrate to Lipid Ratio on Growth Performance, Body Composition and Digestive Enzyme Activities of Juvenile Crab Scylla paramamosain

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  • Key Laboratory of Marine Biotechnology of Guangxi, Guangxi Institute of Oceanology, Beihai 536000, China

Received date: 2016-09-06

  Online published: 2017-03-09

摘要

本试验旨在研究饲料糖脂比对拟穴青蟹仔蟹生长性能、体组成和消化酶活性的影响。以初始体重为(41.4±0.3)mg的拟穴青蟹仔蟹为试验对象,分别投喂糖脂比为0.54、0.88、1.39、2.08和3.50的等氮(约44%)等能(约19.5 MJ/kg)饲料3周。结果表明:1)饲料糖脂比对拟穴青蟹仔蟹的终末平均体重(FABW)、成活率(SR)、增重率(WGR)以及特定生长率(SGR)均有显著影响(P<0.05)。随着饲料糖脂比的增大,拟穴青蟹仔蟹的FABW、SR、WGR以及SGR均呈先升高后降低的趋势,且均是糖脂比1.39试验组最高,显著高于糖脂比0.54和3.50试验组(P<0.05)。2)饲料糖脂比对拟穴青蟹仔蟹的水分、粗蛋白质和粗灰分含量没有显著影响(P>0.05),而对粗脂肪含量的影响显著(P<0.05),糖脂比0.54试验组的脂肪含量最高,显著高于糖脂比2.08和3.50试验组(P<0.05)。3)饲料糖脂比对拟穴青蟹仔蟹的淀粉酶活性没有显著影响(P>0.05),但显著影响蛋白酶和脂肪酶活性(P<0.05)。随着饲料糖脂比的增大,蛋白酶活性呈先增大后减小的趋势,脂肪酶活性呈降低的趋势,糖脂比1.39试验组的蛋白酶活性显著高于其他试验组(P<0.05),糖脂比0.54和0.88试验组的脂肪酶活性显著高于糖脂比2.08和3.50试验组(P<0.05)。以增长率为评价指标,经回归分析得出拟穴青蟹仔蟹饲料的适宜糖脂比为2.07。

本文引用格式

董兰芳, 张琴, 许明珠, 苏琼, 聂振平, 谢达, 杨家林, 童潼 . 饲料糖脂比对拟穴青蟹仔蟹生长性能、体组成和消化酶活性的影响[J]. 动物营养学报, 2017 , 29(3) : 979 -986 . DOI: 10.3969/j.issn.1006-267x.2017.03.031

Abstract

A 3-week feeding trial was conducted to investigate the effects of dietary carbohydrate to lipid (CHO:L) ratio on growth performance, body composition and digestive enzyme activities of juvenile crab Scylla paramamosain. Five iso-nitrogenous (about 44%) and iso-energetic (about 19.5 MJ/kg) diets with varying CHO:L ratios of 0.54, 0.88, 1.39, 2.08 and 3.50 were fed to juvenile crab Scylla paramamosain with an average body weight of (41.4±0.3) mg of triplicate groups. The results showed as follows:1) dietary CHO:L ratio significant affected the final average body weight, survival rate, weight growth rate and specific growth rate of juvenile crabs Scylla paramamosain (P<0.05), and the final average body weight, survival rate, weight growth rate and specific growth rate of juvenile crabs were increased firstly and then decreased with dietary CHO:L ratio increased, those of CHO:L ratio at 1.39 group was the highest, which significantly higher than those of CHO:L ratios at 0.54 and 3.50 groups (P<0.05). 2) Dietary CHO:L ratio had no significantly influence on moisture, crude protein and crude ash contents of juvenile crabs Scylla paramamosain (P>0.05), but significantly affected the crude lipid content (P<0.05). The crude lipid content of CHO:L ratio at 0.54 group was the highest, which significantly higher than that of CHO:L ratios at 2.08 and 3.50 groups (P<0.05). 3) Dietary CHO:L ratio had no significantly influence on the amylase activity of juvenile crabs Scylla paramamosain (P>0.05), but significantly affected the protease and lipase activities (P<0.05). The protease activity was increased firstly and then decreased with dietary CHO:L ratio increased, while the lipases activity was decreased with dietary CHO:L ratio increased. The protease activity of CHO:L ratio at 1.39 group was significantly higher than that of other groups (P<0.05), the lipases activity of CHO:L ratios at 0.54 and 0.88 groups was significantly higher than that of CHO:L ratios at 2.08 and 3.50 groups (P<0.05). In conclusion, the regression model analysis show that the suitable dietary CHO:L ratio to reach the highest weight growth rate is 2.07.

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