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时间:2020-03-25
《饵料中添加不同水平沼泽红假单胞菌对罗非鱼养殖的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、南方农业学报JournalofSouthernAgriculture2014,45(9):1694—1697ISSN2095—1191;CODENNNXAABDOI:10.3969/j:issn.2095—1191.2014.9.1694饵料中添加不同水平沼泽红假单胞菌对罗非鱼养殖的影响黎建斌,何为,李大列,吕敏(广西水产科学研究院,广西南宁530021)摘要:【目的】探讨饵料中添加不同水平沼泽红假单胞菌对罗非鱼养殖的影响,为罗非鱼的规模化、高密度健康养殖提供科学依据。【方法】以沼泽红假单胞菌(有效活菌数≥5×10钆个/mL)为饵料添加剂,分别按3%、5%和7%的
2、比例添加于饵料中投喂罗非鱼;试验期为160d,分6次检测养殖池水质,试验结束起捕计算罗非鱼的单位产量、均末重、成活率及饵料系数等指标并进行研究与评估。【结果】与对照组比,添加沼泽红假单胞菌试验组能有效稳定水体pH,抑制水体氨氦、亚硝酸盐和化学需氧量(COD)等有毒物质的产生(P3、单胞菌综合效果最佳,所产生的单位产量最高。【结论】罗非鱼饵料中添加适量沼泽红假单胞菌,可减少养殖中后期有害物质的积累从而改善水质,促进罗非鱼生长、提高成活率、降低饵料系数和提高经济效益,而过量添加则会影响食欲,抑制生长。最适添加量约为5%,可在罗非鱼养殖区域大面积示范推广应用。关键词:罗非鱼;沼泽红假单胞菌;养殖效果;水质;最适添加量中图分类号:$965.125文献标志码:A文章编号:2095—1191(2014)09—1694—04EffectofdifferentamountofRhodopseudomonaspalustrisfeedadditiveonTi4、lapiamossambicabreedingLIJian—bin,HEWei,LIDa—lie,LYUMin(GuangxiInstituteofFisheries,Nanning530021,China)Abstract:【Objective】TheexperimentwasconductedtostudytheeffectofdifferentamountofRhodopset/do埘omspalustrisfeedadditiveontilapiabreeding,inordertoprovidereterencesformass—scale,high—d5、ensityandheahhveuhivationoftilapia.【Method】TilapiawasfedwithRhodopseudomonaspalustris(≥5X109livingbacteria/mL)additiveattherateof3%÷5%and7%÷respectivelyfor160days.Waterqualityoftheculturepondwastestedforsixtimes.Intheend,yieldperunit,meanaverageweight.smwivalrateandfeedeoefl]eientofti6、lapiawerestudiedandevaluated.【Result】Comparedwiththeeontr01.meanconcentrationofanlnlonianitrogen,nitriteandCODwerelowerinothertreatmentsP7、ientwashigherinthecontr01.Yieldperunit,nleanaverageweight,smwivalrateoftilapiainereasedby15.52%一34.67%,9.10%一18.18%and5.87%一13.97%,respectively.However,feedcoeffieientdescendedby9.42%一21.52%.Comparedeomprehensivelv.thetreatmentof5%Rhodopseudomonaspalt/strisadditiveshowedthebesteffectw8、ithth
3、单胞菌综合效果最佳,所产生的单位产量最高。【结论】罗非鱼饵料中添加适量沼泽红假单胞菌,可减少养殖中后期有害物质的积累从而改善水质,促进罗非鱼生长、提高成活率、降低饵料系数和提高经济效益,而过量添加则会影响食欲,抑制生长。最适添加量约为5%,可在罗非鱼养殖区域大面积示范推广应用。关键词:罗非鱼;沼泽红假单胞菌;养殖效果;水质;最适添加量中图分类号:$965.125文献标志码:A文章编号:2095—1191(2014)09—1694—04EffectofdifferentamountofRhodopseudomonaspalustrisfeedadditiveonTi
4、lapiamossambicabreedingLIJian—bin,HEWei,LIDa—lie,LYUMin(GuangxiInstituteofFisheries,Nanning530021,China)Abstract:【Objective】TheexperimentwasconductedtostudytheeffectofdifferentamountofRhodopset/do埘omspalustrisfeedadditiveontilapiabreeding,inordertoprovidereterencesformass—scale,high—d
5、ensityandheahhveuhivationoftilapia.【Method】TilapiawasfedwithRhodopseudomonaspalustris(≥5X109livingbacteria/mL)additiveattherateof3%÷5%and7%÷respectivelyfor160days.Waterqualityoftheculturepondwastestedforsixtimes.Intheend,yieldperunit,meanaverageweight.smwivalrateandfeedeoefl]eientofti
6、lapiawerestudiedandevaluated.【Result】Comparedwiththeeontr01.meanconcentrationofanlnlonianitrogen,nitriteandCODwerelowerinothertreatmentsP7、ientwashigherinthecontr01.Yieldperunit,nleanaverageweight,smwivalrateoftilapiainereasedby15.52%一34.67%,9.10%一18.18%and5.87%一13.97%,respectively.However,feedcoeffieientdescendedby9.42%一21.52%.Comparedeomprehensivelv.thetreatmentof5%Rhodopseudomonaspalt/strisadditiveshowedthebesteffectw8、ithth
7、ientwashigherinthecontr01.Yieldperunit,nleanaverageweight,smwivalrateoftilapiainereasedby15.52%一34.67%,9.10%一18.18%and5.87%一13.97%,respectively.However,feedcoeffieientdescendedby9.42%一21.52%.Comparedeomprehensivelv.thetreatmentof5%Rhodopseudomonaspalt/strisadditiveshowedthebesteffectw
8、ithth
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