摘要
【目的】评价不同投饲率的黄颡鱼养殖塘水质动态变化,探索不同外源饲料输入量对黄颡鱼养殖塘水质的影响,为黄颡鱼规模化养殖塘生境生态修复提供参考。【方法】采用5种投饲率(1.0%、1.5%、2.0%、2.5%和3.0%)对黄颡鱼进行池塘养殖,定期监测各组塘主要环境因子,以主成分分析(PCA)结合灰色关联分析法评价各塘水质健康状况。通过水质评价结果的比较分析,提出基于良水质的黄颡鱼养殖塘饲料输入模式。【结果】CODMn、DO、TN、TP及NH3-N是黄颡鱼养殖塘主要环境因子;pH值与其他环境因子均存在极高相关性,TN与TP、NH3-N均呈显著相关性;5个试验处理中,A组塘(投饲率1.0%)、B组塘(投饲率1.5%)、C组塘(投饲率2.0%)、E组塘(投饲率3.0%)各阶段水质均达Ⅲ类,符合水产品养殖水质标准,而D组塘(投饲率2.5%)在养殖中期水质级别达到Ⅳ类水,且水体中的TN、TP等因子含量超标,水质污染较严重,同时A、B、C组塘主成分综合得分较低,分别为1.2704536、1.2704664、1.2704642,水质状况良好。【结论】投饲率为1.0%~2.0%的处理组养殖水体的水质状况最好,过高的投饲率会降低养殖水体的水质健康状况。
【Objective】The study was to evaluate the dynamic changes of water quality of Pelteobagrus fulvidraco ponds with different feeding rates and explore the effects of different exogenous feed inputs on the water quality of P.fulvidraco ponds in order to provide reference for the ecological restoration of large-scale culture ponds of P.fulvidraco.【Method】In P.fulvidraco ponds,the feeding rates of 1.0%,1.5%,2.0%,2.5%and 3.0%were set,and the main environmental factors in each group were monitored regularly.Combined with Grey Relational Analysis,Principal Component Analysis(PCA)was used to evaluate the water quality and health status of each pond.Based on the comparative analysis of water quality evaluation results,a feed input model for P.fulvidraco ponds based on good water quality was put forward.【Results】The results showed that CODMn,DO,TN,TP and NH3-N were the main environmental factors affecting the water quality of P.fulvidraco culture ponds.The pH value had extremely high correlation with other environmental factors,and the TN had significant correlation with TP and NH3-N.Among five experimental groups,the water quality of group A pond(feeding rate:1.0%),group B pond(feeding rate:1.5%),group C pond(feeding rate:2.0%),group E pond(feeding rate:3.0%)reached water quality grade of classⅢin all stages,which is consistent with the water quality of aquaculture.The water quality of group D pond(feeding rate:2.5%)reached water quality grade of classⅣin the middle stage of aquaculture,and the contents of TN and TP in the water exceeded those of the standard levels,therefore,the water quality pollution was serious.At the same time,the comprehensive scores of principal components in group A,B and C were 1.2704536,1.2704664 and 1.270464,respectively,and the water quality was in good condition.【Conclusion】The experimental groups with feeding rates of 1.0%-2.0%have the best water quality,and excessive feeding rate will reduce the quality and health of aquaculture water.
作者
赵晚晨
秦秀东
程光平
张伟刚
孙玉章
李文红
赵学倩
张亚军
ZHAO Wanchen;QIN Xiudong;CHENG Guangping;ZHANG Weigang;SUN Yuzhang;LI Wenhong;ZHAO Xueqian;ZHANG Yajun(College of Animal Science and Technology,Guangxi University/Key Laboratory of Aquatic Bio-health Culture and Nutrition Regulation,Nanning 530005,China;Guilin Second Aquatic Farm,Guilin 541000,China;Guangxi Guilin Small-pond Animal Husbandry Co.,Ltd.,Guilin 541000,China)
出处
《广东农业科学》
CAS
2019年第7期144-155,共12页
Guangdong Agricultural Sciences
基金
广西科学研究与技术开发计划项目（桂科AB16380057，桂科AA17204095-2)
关键词
黄颡鱼养殖
投饲率
主成分分析(PCA)
灰色关联分析
理化因子
富营养化
Pelteobagrus fulvidraco culture
feeding modes
Principal Component Analysis(PCA)
Grey Relational Analysis
physicochemical factors
eutrophication
