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      2. 咸淡水集約化草魚池塘飼料投喂量與水質及浮游生物的關系
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        1.華中農業大學水產學院水生動物醫學系;2.廣州市誠一水產養殖有限公司

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        現代農業產業技術體系專項資金資助CARS-46


        Relation between feeding quantity in salt-fresh water intensive of Grass carp aquaculture pond and water quality,plankton
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        基金項目:現代農業產業技術體系專項資金資助CARS-46(Supported by China Agriculture Research System CARS-46);湖北省農業科技創新中心(2019-620-000-001-33);校企技術開發:廣東沿海淡水池塘養殖魚類寄生蟲病的防控方案(3177225)

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          摘要:

          為探究咸淡水集約化草魚池塘飼料投喂量與水質及浮游生物的關系,本研究于2017.9~2018.9,周期性調查了廣州市誠一水產養殖有限公司3個咸淡水草魚池塘的浮游生物量、水質和池塘飼料投喂量數據,并利用SPSS和Canoco 5.0對數據進行相關性、排序和多元回歸分析。結果顯示:飼料投喂量與水體總氮濃度呈顯著正相關關系,其相關系數為0.614(P<0.05),與水溫、pH、透明度、溶氧、亞硝酸鹽、氨氮、總磷和鹽度等水質指標無顯著相關性。飼料投喂量與浮游植物生物量呈顯著正相關,相關系數為0.354(P<0.05),與浮游動物生物量呈極顯著正相關關系,相關系數為0.447(P<0.01)。將飼料投喂量和水質指標與浮游生物量進行RDA和多元逐步回歸分析,結果顯示飼料投喂量和總磷分別是影響浮游動物和浮游植物生物量的關鍵因子;且多元回歸數據模型擬合較好,預測模型對浮游植物和浮游動物生物量解釋率分別為65.4%和44.8%,模型分別為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。咸淡水集約化池塘飼料投喂量對池塘總氮濃度和浮游生物量均有顯著影響,浮游植物對池塘氨氮的吸收能力間接影響池塘飼料投喂量,且浮游動物生物量可在一定程度上反映飼料投喂是否過量。因此在養殖生產中,飼料投喂量需結合池塘水質及浮游生物量的情況進行調節,預測模型Y1和Y2可供參考。

          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
        • 錄用日期:2020-12-11
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