摘要
2015年7-10月对浙江省杭州市6口养殖生产池塘内大口黑鲈和乌鳢的生长性能、池塘水质和底质状况进行了分析比较。所研究的池塘中,3口(B1、B2和B3)投喂配合饲料养殖大口黑鲈,2口(S1和S2)投喂配合饲料养殖乌鳢,1口(S3)投喂冰鲜鱼养殖乌鳢。试验结果:8月11日—9月4日,池塘B1内大口黑鲈体质量增加62 g/尾,池塘S1内乌鳢体质量增加113 g/尾,池塘S3内乌鳢体质量增加31 g/尾。研究期间,池塘S1和S2水中氨氮(TAN)、亚硝酸盐氮(NO_2~--N)、硝酸盐氮(NO_3~--N)、总氮(TN)、总有机碳(TOC)和底泥总磷(TP)均高于池塘B1、B2、B3;池塘S3水中TAN、活性磷酸盐(PO_4~(3-)-P)、TN、TP和底泥TN、TP、POC高于池塘S1和S2,但水中NO_2~--N、NO_3~--N、COD_(Mn)和TOC均低于池塘S1和S2。结果表明,采用配合饲料饲喂大口黑鲈和乌鳢可正常生长;投喂配合饲料时,乌鳢池塘水中TN和TOC的积累程度高于大口黑鲈池塘,表明乌鳢养殖池塘中有机质的积累程度高于大口黑鲈池塘。
引文
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