Research on the Purification Effect of Rice Floating Bed on Water Quality in Aquaculture Ponds
To study the effect of rice on water purification and fish yield in aquaculture ponds,two treatments were designed,namely the rice floating bed group(experimental group)and the conventional aquaculture group(control group).During the experiment,the physical and chemical indicators of water quality in two experimental ponds were regularly tested.After the experiment,the yield of farmed fish,survival rate,and rice yield were counted.The results showed that the average water temperature of the experimental group was slightly lower than that of the control group,and the transparency(SD)was higher than that of the control group;in the early stage of the experiment,the dissolved oxygen(DO)content in the experimental group was higher than that in the control group,and in the middle and later stages,the DO content was lower than that in the control group.During the experiment,the average removal rates of total phosphorus(TP),total nitrogen(TN),ammonia nitrogen(NH4+-N),nitrite nitrogen(NO2--N),and chemical oxygen demand(CODMn)in the aquaculture pond water by rice float-ing bed were 30.6%,29.6%,27.9%,21.0%,and 15.6%,respectively.The survival rate of different cultured fish in the experimental group was higher than that in the control group,with a fish yield of 22557.15 kg/hm2 and a floating bed rice yield of 5234.57 kg/hm2.
Pond aquacultureFloating bed rice cultivationWater purification
国家科技期刊平台
NSTL
万方数据
