| 不同卤虫混养比例对生物絮凝系统凡纳滨对虾标粗效果的影响 |
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| 引用本文： | 柳泽锋,杨名帆,罗国芝,谭洪新.不同卤虫混养比例对生物絮凝系统凡纳滨对虾标粗效果的影响[J].水产科技情报,2021,48(6):307-313. |
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| 作者姓名： | 柳泽锋 杨名帆 罗国芝 谭洪新 |
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| 作者单位： | 上海水产养殖工程技术研究中心,上海海洋大学,上海 201306;上海水产养殖工程技术研究中心,上海海洋大学,上海 201306;农业部淡水水产种质资源重点实验室,上海海洋大学,上海 201306;水产科学国际级实验教学示范中心,上海海洋大学,上海 201306 |
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| 基金项目： | 上海水产养殖工程技术研究中心项目(19DZ2284300)。 |
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| 摘 要： | 在生物絮凝凡纳滨对虾养殖系统中,分别以100%、50%、0%的比例投喂活的卤虫幼体(Artemia spp)和饲料(分别记为A组,AF组和F组),研究其对养殖过程中氮素转化途径及转化效率的影响。卤虫以湿质量计算,饲料以干质量计算。试验结果显示,A组亚硝酸盐浓度显著低于另外2组(P<0.05)；各组氨氮浓度在养殖第7天时达到峰值,此后迅速降低并维持在1 mg/L以下,3组之间差异不显著(P>0.05)；3组硝酸盐浓度均无积累,且略有下降；养殖30 d后,A组对虾存活率(35.67%)显著高于其余两组(均低于30%)(P<0.05)；A组对虾终末平均体质量为(1.92±0.96)g,显著低于AF组的(2.99±1.85)g和F组的(3.25±1.23)g(P<0.05),原因可能是卤虫的营养成分相比配合饲料较为单一。
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| 关 键 词： | 生物絮凝 卤虫 凡纳滨对虾 混养 |
| 收稿时间： | 2020/7/22 0:00:00 |
Effect of different Artemia mixed feeding ratio on nursing Litopenaeus vannamei in seawater bioflocs system |
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| LIU Zefeng,YANG Mingfan,LUO Guozhi,TAN Hongxin.Effect of different Artemia mixed feeding ratio on nursing Litopenaeus vannamei in seawater bioflocs system[J].Fisheries Science & Technology Information,2021,48(6):307-313. |
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| Authors: | LIU Zefeng YANG Mingfan LUO Guozhi TAN Hongxin |
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| Institution: | Shanghai Engineering Research Center of Aquaculture,Shanghai Science and Technology Committee,Shanghai Ocean University,Shanghai 201306,China;Shanghai Engineering Research Center of Aquaculture,Shanghai Science and Technology Committee,Shanghai Ocean University,Shanghai 201306,China;Key Laboratory of Freshwater Aquatic Genetic ResourcesMinistry of Agriculture of PRC,Shanghai Ocean University,Shanghai 201306,China;National Demonstration Center for Experimental Fisheries Science EducationMinistry of Education of PRC,Shanghai Ocean University,Shanghai 201306,China |
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| Abstract: | Biofloc technology involves the manipulation of C/N ratio to convert toxic nitrogenous wastes into useful microbial protein and helps in improving water quality in a closed system.The effect of nursery shrimp Litopenaeus vannamei with different ratios of Artemia in seawater bioflocs system was investigated in the experiment.Three groups were designed:shrimp in the first group were fed with 100% Artemia,referred as A group;shrimp in the second group were fed with 50% Artemia and 50% formulated feed,referred as AF group;shrimp in the last group were fed with 100% formulated food,referred as F group.During the 30 days nursery period,the concentration of nitrite nitrogen in the water of A group was significantly lower than that of the other two groups(P<0.05).No significant difference in the ammonium nitrogen concentration among the three groups(P>0.05).No obvious accumulation of nitrate in the three groups was found during the 30 days period.The survival rate of shrimp in A group (35.67%) was significantly higher than that of the other two groups.However,the average body weight of shrimp in the A group was only (1.92±0.96) g,which was significantly lower than that of AF group (2.99±1.85) g] and F group (3.25±1.23) g]. |
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| Keywords: | bioflocs technology Artemia Litopenaeus vannamei mixed feeding |
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