文章摘要
牡蛎壳作为生物絮凝养殖系统缓释碱度源的效果
Effect of oyster shell as slow-release alkalinity source in biofloc technology culture system
投稿时间:2019-06-30  修订日期:2019-10-04
DOI:
中文关键词: 生物絮凝技术  碱度  牡蛎壳  吉富罗非鱼
英文关键词: biofloc technology  alkalinity  oyster shell  GIFT (Oreochromis niloticus)
基金项目:国家自然科学基金
作者单位E-mail
蒙浩焱 上海水产养殖工程技术研究中心上海市科委 menghy0103@163.com 
胡鑫 上海水产养殖工程技术研究中心上海市科委  
吴霞 上海水产养殖工程技术研究中心上海市科委  
谭洪新 上海水产养殖工程技术研究中心上海市科委  
罗国芝 上海水产养殖工程技术研究中心上海市科委 gzhluo@shou.edu.cn 
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中文摘要:
      本试验研究了在生物絮凝-罗非鱼养殖系统中牡蛎壳补充碱度的可行性。在系统启动阶段评估了不同牡蛎壳添加量0.00 g/L(对照组,A组)、0.36 g/L(B组)、0.72 g/L(C组)补充碱度的可行性。结果显示,C组碱度、pH和钙离子水平显著高于A组(P<0.05),但B、C组组间的水质差异不显著(P>0.05),牡蛎壳补充碱度效果明显。在启动阶段的基础上,对比研究了两种形态的牡蛎壳(壳粉,B组)、(壳,C组)为生物絮凝罗非鱼养殖系统补充碱度的效果。各组的水质指标、鱼体酶活免疫性能以及细菌群落组成均无明显差异,牡蛎壳及壳粉对罗非鱼生长没有明显的负面影响,可以被应用到生物絮凝养殖系统中,但补充碱度效果不明显。牡蛎壳补充碱度与形态无关。研究表明,在目前实验条件下,牡蛎壳在生物絮凝养殖系统中不能完全替代碳酸氢钠,还需进一步优化相关工艺。
英文摘要:
      Oyster shell was used as alkalinity supplementary material to study the feasibility of supplement alkalinity with oyster shell in biofloc technology-tilapia(GIFT Oreochromis niloticus)culture system. At the start-up stage, the feasibility of supplement alkalinity with different oyster shell dosage of 0.00 g/L (control group, group A), 0.36 g/L (group B) and 0.72 g/L (group C) was evaluated. The results showed that the level of alkalinity, pH and calcium in group C were significantly higher than those in group A (P < 0.05), but there was no significant difference between groups B and C (P > 0.05), the effect of supplement alkalinity with oyster shell is obvious. Based on the results of the start-up, The effects of supplement alkalinity to tilapia culture system with two forms of oyster shell -(shell powder, group B) and (shell, group C)-were studied. There were no significant differences in water quality, digestive enzyme activity, immunity and bacterial community composition among the three groups. Oyster shell and shell powder had no significant negative effects on the growth of tilapia and could be applied to the biofloc aquaculture system, but it is no obvious that the effect of supplement alkalinity with oyster shell in culture stage. The supplementation of alkalinity had nothing to do with forms of oyster shell. Under the current experimental conditions, oyster shell can not completely replace sodium bicarbonate in the biofloc aquaculture system, and the related technology need to be further optimized.
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