不同氮、磷浓度对4种饵料微藻生长的影响  

The Effects of Nitrogen and Phosphorus Concentrations on the Growth of Four Bait Microalgae

作　　者：李万年 余祥勇 张振波 LI Wannian;YU Xiangyong;ZHANG Zhenbo(College of marine sciences,South China Agricultural University,Guangzhou,Guangdong 510642,China)

机构地区：[1]华南农业大学海洋学院,广东广州510642

出　　处：《水产养殖》2025年第1期29-34,共6页Journal of Aquaculture

基　　金：阳江市科技计划项目(2022010)。

摘　　要：以f/2培养基为基础,分别对其中氮、磷营养盐浓度进行加富和减半处理,分析不同氮、磷浓度对牟氏角毛藻(Chaetoceros mueller)、球等鞭金藻(Isochrysis galbana)、小球藻(Chlorella)和亚心形扁藻(Platymonas subcordiformis)生长的影响。结果表明,4种饵料微藻在不同氮、磷浓度下均能生长,其生长状况差异显著(P<0.05)。指出,高氮、磷浓度条件下,4种藻类生长速度均较低,培养基中营养盐浓度并不是越高越好,微藻培养过程中未被消耗的氮、磷,会随着饵料的投喂进入贝类育苗系统,不利于苗种的生长和存活。提出,牟氏角毛藻的最适氮、磷的浓度为1.760和0.074 mol/L;球等鞭金藻的最适浓度为0.441和0.074 mol/L;小球藻的最适浓度为0.880和0.019 mol/L;亚心形扁藻的最适浓度为0.882和0.074 mol/L。Based on the f/2 medium,this study varied the nitrogen and phosphorus nutrient concentrations by enrichment and halving to examine their effects on the growth of Chaetoceros muelleri,Isochrysis galbana,Chlorella and Platymonas subcordiformis.Results indicate that all four species of bait microalgae can grow under different nitrogen and phosphorus conditions,showing significant growth differences(P<0.05).The findings reveal that higher concentrations of nitrogen and phosphorus do not necessarily equate to better growth rates.Excess nutrients not consumed during the microalgae culturing process may enter the bivalve hatchery system through the feeding of bait,adversely affecting the growth and survival of the larvae.Optimal nutrient concentrations are identified as 1.760 and 0.074 mol/L for Chaetoceros muelleri,0.441 and 0.074 mol/L for Isochrysis galbana,0.880 and 0.019 mol/L for Chlorella,and 0.882 and 0.074 mol/L for Platymonas subcordiformis.

关 键 词：饵料微藻 磷 氮 比生长率 

分 类 号：S963[农业科学—水产养殖]