咸淡水集约化草鱼池塘饲料投喂量与水质及浮游生物的关系
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1.华中农业大学水产学院水生动物医学系;2.广州市诚一水产养殖有限公司

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现代农业产业技术体系专项资金资助CARS-46


Relation between feeding quantity in salt-fresh water intensive of Grass carp aquaculture pond and water quality,plankton
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基金项目:现代农业产业技术体系专项资金资助CARS-46(Supported by China Agriculture Research System CARS-46);湖北省农业科技创新中心(2019-620-000-001-33);校企技术开发:广东沿海淡水池塘养殖鱼类寄生虫病的防控方案(3177225)

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    摘要:

    为探究咸淡水集约化草鱼池塘饲料投喂量与水质及浮游生物的关系,本研究于2017.9~2018.9,周期性调查了广州市诚一水产养殖有限公司3个咸淡水草鱼池塘的浮游生物量、水质和池塘饲料投喂量数据,并利用SPSS和Canoco 5.0对数据进行相关性、排序和多元回归分析。结果显示:饲料投喂量与水体总氮浓度呈显著正相关关系,其相关系数为0.614(P<0.05),与水温、pH、透明度、溶氧、亚硝酸盐、氨氮、总磷和盐度等水质指标无显著相关性。饲料投喂量与浮游植物生物量呈显著正相关,相关系数为0.354(P<0.05),与浮游动物生物量呈极显著正相关关系,相关系数为0.447(P<0.01)。将饲料投喂量和水质指标与浮游生物量进行RDA和多元逐步回归分析,结果显示饲料投喂量和总磷分别是影响浮游动物和浮游植物生物量的关键因子;且多元回归数据模型拟合较好,预测模型对浮游植物和浮游动物生物量解释率分别为65.4%和44.8%,模型分别为Y1=16.07X4+13.60X3+11.10X2+2.22X6-2.20X5-2.06X1-51.57、Y2=2243.92x4+5.54x3+0.90x2+0.006x1-57.48。咸淡水集约化池塘饲料投喂量对池塘总氮浓度和浮游生物量均有显著影响,浮游植物对池塘氨氮的吸收能力间接影响池塘饲料投喂量,且浮游动物生物量可在一定程度上反映饲料投喂是否过量。因此在养殖生产中,饲料投喂量需结合池塘水质及浮游生物量的情况进行调节,预测模型Y1和Y2可供参考。

    Abstract:

    In order to explore the relationship between the feeding quantity, water quality, and plankton in salt-freshwater intensive grass carp farming ponds,this study regularly sampled and investigated the water qualities, amount of feed, and plankton of three brackish water carp farming ponds in Guangzhou Chengyi Aquaculture Co., Ltd. from September 2017 to September 2018. Spearman and Canoco 5.0 were then used to correlate and rank the data. The results showed that the feeding quantity was significantly positively correlated with the total nitrogen concentration of the water, and its correlation coefficient was 0.614 (P<0.05), which was related to water temperature, pH, transparency, dissolved oxygen, nitrite, ammonia nitrogen, total phosphorus and salinity. There is no significant correlation with other water quality indicators. The feed amount and phytoplankton biomass were significantly positively correlated, the correlation coefficient was 0.354 (P<0.05), and the zooplankton biomass was extremely significantly positively correlated, the correlation coefficient was 0.447 (P<0.01). The RDA ranking analysis was performed on the feed quantity and water quality index and plankton biomass. The sorting results showed that the feed quantity and total phosphorus were the key factors affecting zooplankton and phytoplankton biomass, respectively. The multiple regression data model fitted well. The interpretation rate of the prediction model for phytoplankton and zooplankton biomass were 65.4% and 44.8%, respectively. The models were Y1 = 16.07x4 + 13.60x3 + 11.10x2 + 2.22x6-2.20x5-2.06x1-51.57; Y2 = 2243.92x4 + 5.54x3 + 0.90x2 + 0.006x1-57.48. Conclusion: in brackish water intensive grass carp breeding ponds, the feeding quantity has a significant effect on the total nitrogen concentration and phytoplankton in the pond. At the same time, the purification ability of phytoplankton to the pond nitrogen also limits the amount of pond feed. Therefore, the regulation of the feeding quantity in the pond should take the water quality and plankton into consideration.

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  • 收稿日期:2020-09-28
  • 最后修改日期:2020-11-23
  • 录用日期:2020-12-11
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