数字农科院2.0

Impact Of Rice-Catfish/Shrimp Co-Culture On N.utrients Fluxes Across Sediment-Water I nterface In Intensive Aquaculture Ponds

文献类型： 外文期刊

作者： Qin Lin;Ji Long;Zhou Xiyue;Xu Chunchun;Li Fengbo;Fang Fuping;Liu Yaobin;Feng Jinfei;Li Fengbo;Chen Zhongdu

作者机构：

关键词： sediment-water interface; rice-fish co-culture; eutrophication; nitrogen and phosphorus recycling; aquaculture

期刊名称： RICE SCIENCE

ISSN： 1672-6308

年卷期： 2019 年 26 卷 6 期

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摘要： Exchange of nitrogen and phosphorus across sediment-water interface plays an important role in the management of nutrient recycling in the aquaculture pond. In this study, a plot experiment was conducted to study the effect of rice-catfish/shrimp co-culture on the micro-profile of oxygen (O-2), pH and nutrient exchange across sediment-water interface in the intensive culture ponds. The results showed that rice-catfish co-culture increased the concentration and penetrating depth of O-2, but decreased the pH value across the sediment-water interface, compared with catfish monoculture. Additional rice cultivation significantly reduced the flux rates of ammonium (NH4+) and nitrate (NO3-) across sediment-water interface in the catfish and shrimp ponds. The flux rates of NO2- and soluble phosphorus (PO43-) showed no significant difference between rice-catfish/shrimp co-culture ponds and catfish/shrimp monoculture ponds. Rice only affected the dissolved inorganic nitrogen and phosphorus fractions in the sediment. The concentrations of NH4+ were significantly lower in the sediment of co-culture ponds than in the monoculture ponds. Additional rice cultivation also significantly reduced the content and percentage of dissolved inorganic phosphorus in the sediment of catfish ponds.

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