水产营养 Aquaculture Nutrition

湘云鲫饲料中磷酸二氢钙的适宜添加量

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  • 1. 西南大学动物科技学院, 淡水鱼类资源与生殖发育教育部重点实验室, 重庆 400716;
    2. 新希望畜牧科技有限公司, 成都 610041
王双(1994-),女,辽宁朝阳人,硕士研究生,研究方向为水产动物营养与饲料科学。E-mail:ws_0407@126.com

收稿日期: 2018-03-26

  网络出版日期: 2018-10-20

基金资助

重庆市社会民生科技创新专项(cstc2016shmszx80084);重庆市生态渔产业技术体系项目(2016—2021)

Optimal Supplemental Level of Monocalcium Phosphate in Diets for Triploid Crucian Carp

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  • 1. College of Animal Science and Technology of Southwest University, Key Laboratory of Freshwater Reproduction and Development, Ministry of Education, Chongqing 400716, China;
    2. New Hope Animal Husbandry Technology Co., Ltd., Chengdu 610041, China

Received date: 2018-03-26

  Online published: 2018-10-20

摘要

本试验以初始体重为(40.00±0.34)g的湘云鲫幼鱼为研究对象,将其随机分为6组(每组3个重复,每个重复20尾鱼),分别饲喂磷酸二氢钙(MCP)添加量为1.0%、1.5%、2.0%、2.5%、3.0%和3.5%的6种等氮等能的实用饲料,进行8周的养殖试验,旨在研究湘云鲫饲料中MCP的适宜添加量。结果显示:随饲料中MCP添加量的增加,湘云鲫的终末均重、增重率(WGR)均呈先上升后下降的趋势,饲料系数(FCR)呈现下降后上升的趋势,终末均重、WGR均在MCP添加量为2.5%时达到最高值,FCR在MCP添加量为3.0%时达到最低值。随着饲料中MCP添加量的增加,湘云鲫全鱼、肌肉和肝脏粗脂肪含量呈先下降后上升的趋势,在添加量为2.5%时达到最低值,而全鱼粗蛋白质含量以及全鱼和脊椎骨磷含量在该添加量下达到最高值。全鱼水分含量在各组间差异不显著(P>0.05)。在MCP添加量为2.5%时,肠道淀粉酶、脂肪酶、胰蛋白酶活性以及血清超氧化物歧化酶、碱性磷酸酶活性达到最高值,血清甘油三酯含量和肝脏丙二醛含量达到最低值。血清胆固醇含量各组间差异不显著(P>0.05)。血清磷含量随饲料中MCP添加量的增加呈先上升后稳定的趋势,血清钙含量各组间无差异显著(P>0.05)。以WGR、FCR、全鱼和脊椎骨磷含量为观测指标,通过二次曲线模型和折线模型分析得出,湘云鲫饲料中MCP的适宜添加量为2.55%~2.71%。

本文引用格式

王双, 罗莉, 石亚庆, 唐毅, 李战福, 李伟龙, 罗浩 . 湘云鲫饲料中磷酸二氢钙的适宜添加量[J]. 动物营养学报, 2018 , 30(10) : 3985 -3992 . DOI: 10.3969/j.issn.1006-267x.2018.10.023

Abstract

This experiment was conducted to study the optimal supplemental level of monocalcium phosphate (MCP) in diets for triploid crucian carp. Triploid crucian carps with an initial body weight of (40.00±0.34) g were randomly divided into 6 groups with 3 replicates per group and 20 fish per replicate. Six isonitrogenous and isoenergetic practical diets with different supplemental levels (1.0%, 1.5%, 2.0%, 2.5%, 3.0% and 3.5%) of MCP were fed to the 6 groups for 8 weeks, respectively. The results showed as follows:with the increase of dietary MCP supplemental level, the final average body weight and weight gain rate (WGR) were firstly increased and then decreased, while the feed conversion rate (FCR) was firstly decreased and then increased. The highest final average body weight and WGR appeared when MCP supplemental level was 2.5%, and the lowest FCR appeared when MCP supplemental level was 3.0%. With the increase of dietary MCP supplemental level, the ether extract content of whole body, muscle and liver was firstly decreased and then increased, and got minimum when MCP supplemental level was 2.5%, together with a maximum of crude protein content of whole body, and phosphorus content of whole body and vertebra in this MCP supplemental level. There was no significant difference in moisture content of whole body among different groups (P>0.05). When MCP supplemental level was 2.5%, the activities of intestinal trypsin, amylase and lipase, and serum superoxide dismutase (SOD) and alkaline phosphatase (AKP) gained the highest values, while the contents of serum triglyceride (TG) and liver malonaldehyde (MDA) reached the lowest values under this MCP supplemental level. Serum cholesterol (CHO) content had no significant difference among different groups (P>0.05). Serum phosphorus content was firstly increased with the increase of MCP supplementation level, and then tended to be stable. No significant difference was found in serum calcium content among different groups (P>0.05). Quadratic curve model and broken-line model analysis indicate that the optimal supplemental level of MCP in diets for triploid crucian carp is 2.55% to 2.71% with the WGR, FCR, whole body and vertebrae phosphorus content as evaluation indexes.

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