Chinese Journal OF Rice Science >
Impacts of Rice-Fish Co-culture on the Physical and Chemical Variables of the Microprofiles at Sediments-Water Interface in an Intensive-culture Pond
Received date: 2016-05-05
Revised date: 2016-07-15
Online published: 2016-11-10
An experiment was carried out to investigate the physical and chemical variables in sediment-water interface of yellow catfish pond with and without rice planting. The results showed that rice-fish co-cultures slowed down the decrease of O2 concentration around the sediment-water interface, and increase the O2 penetration depths by 71.4%, comparing with fish monoculture pond. Additionally, rice-fish co-culture increased the Eh value, and improved the aerobic condition in the sediment of pond. Rice-fish co-culture also decreased the pH around sediment-water interface. The pH of rice-fish co-culture pond was lower than that of monoculture pond by one unit. These results indicated that rice growing changed the mocroenvironment of the sediment-water interface of fish pond, which may affect the migration and transformation of elements around this interface.
Key words： rice; fish culture pond; sediment-water interface; microelectrode; vertical profile
Lin QIN, Yao-bin LIU, Feng-bo LI, Jin-fei FENG, Dian-xing WU, Fu-ping FANG . Impacts of Rice-Fish Co-culture on the Physical and Chemical Variables of the Microprofiles at Sediments-Water Interface in an Intensive-culture Pond[J]. Chinese Journal OF Rice Science, 2016 , 30(6) : 647 -652 . DOI: 10.16819/j.1001-7216.2016.6077
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