Rice Science ›› 2019, Vol. 26 ›› Issue (6): 416-424.DOI: 10.1016/j.rsci.2019.06.001

• Research Paper • Previous Articles    

Impact of Rice-Catfish/Shrimp Co-culture on Nutrients Fluxes Across Sediment-Water Interface in Intensive Aquaculture Ponds

Yaobin Liu1,#, Lin Qin3,#, Fengbo Li1,2, Xiyue Zhou1, Chunchun Xu1, Long Ji1, Zhongdu Chen1, Jinfei Feng1(), Fuping Fang1()   

  1. 1China National Rice Research Institute, Hangzhou 310006, China
    2Integrated and Urban Plant Pathology Laboratory, Université de Liège, Gembloux B-5030, Belgium;
    3Analysis and Determination Center, Sichuan Academy of Agricultural Sciences, Chengdu 610000, China.
  • Received:2019-04-03 Accepted:2019-06-24 Online:2019-11-28 Published:2019-08-19
  • Contact: Yaobin Liu, Lin Qin
  • About author:

    These authors contributed equally to this work

Abstract:

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 (O2), 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 O2, 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.

Key words: sediment-water interface, rice-fish co-culture, eutrophication, nitrogen and phosphorus recycling, aquaculture