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

作     者：LIU Yaobin QIN Lin LI Fengbo ZHOU Xiyue XU Chunchun JI Long CHEN Zhongdu FENG Jinfei FANG Fuping 

作者机构：1China National Rice Research Institute Hangzhou 310006 China Integrated and Urban Plant Pathology Laboratory Université de Liège Gembloux B-5030 Belgium Analysis and Determination Center Sichuan Academy of Agricultural Sciences Chengdu 610000 China 

出 版 物：《Rice science》 (水稻科学（英文版）)

年 卷 期：2019年第26卷第6期

页      面：416-424页

核心收录：

学科分类：09[农学] 

基　　金：supported by the Natural Science Foundation of China(Grant Nos.41877548 and 31400379) Natural Science Foundation of Zhejiang Province of China(Grant No.LY15C030002) Innovation Program of Chinese Academy of Agricultural Sciences 

主　　题：sediment-water interface rice-fish co-culture eutrophication nitrogen and phosphorus recycling aquaculture 

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 (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.