作　　者： ; ; ; (李活）;

机构地区： 广东海洋大学水产学院

出　　处： 《广东海洋大学学报》 2009年第6期87-91,共5页

摘　　要： 在凡纳滨对虾养殖环境中人工引入不同浓度的光合细菌,监测氨氮、亚硝酸氮、化学需氧量的变化,15d后测定凡纳滨对虾的AKP、POD、PO、SOD、抗菌、溶菌活力,以及不同光合细菌浓度下凡纳滨对虾的成活率与体重增长率,研究光合细菌对水质和凡纳滨对虾抗病力的影响。结果表明,引入光合细菌可显著降低水体化学需氧量、氨氮含量,并抑制亚硝酸盐氮的产生,提高凡纳滨对虾的抗病力。当光合细菌投放浓度为3×103/mL时,水体中化学需氧量、氨态氮、亚硝酸盐氮含量的均值分别比对照组降低31.59%、43.42%、52.20%,差异显著(P<0.05);对虾的AKP、POD、PO、SOD、抗菌、溶菌活力分别比照组提高31.92%、72.29%、55.56%、31.61%、39.07%、69.51%,差异显著(P<0.05);成活率,体重增长率分别比对照组提高18.67%、34.03%,差异显著(P<0.05)。 Different concentrations of Photosynthetic Bacteria were added into culture water of Litopenaeus vannamei and the concentration of NH3-N, NO2-N and COD were determined. After 15 days culture, the survival rate, the weight-gaining rate, the activity of AKP （alkaline phosphatase）, POD （Phenoloxidase）, PO （Phenoloxidase）, SOD （superoxide dismutase）, the anti-bacteria and bacteriolysis of the shrimp were measured. The results of comparative test between treatment and control groups showed that Photosynthetic Bacteria in appropriate density （3×103/mL） could significantly （P〈0.05） improve the water quality and anti-disease ability of L. vannamei： the average concentration of NH3-N, NO2-N and COD decreased respectively by 43.42%, 52.20% and 31.59%; the survival rate and the weight-gaining rate increased respectively by 18.67% and 34.03%; the activity of anti-bacterial, bacteriolysis, AKP, PO, POD and SOD increased respectively by 39.07%, 69.51%, 31.92%, 55.56%, 72.29% and 31.61%.

关 键 词： 光合细菌 水质调控 凡纳滨对虾 抗病力

领　　域： [农业科学] [农业科学]