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Rice field for the treatment of pond aquaculture effluents

机译：稻田用于池塘池塘养殖废水的处理

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We conducted an experiment to evaluate the efficiency of rice fields in treating pond aquaculture effluent and its responses to different fertilizer treatments. Four treatments was considered in the experiment:?no?rice planted as the control (CT); rice?planted?and?no?fertilizer input?(RE); rice?planted and?a rate of approximately?1.0 g m-1?d-1?potassium chloride?application?(RK) and?rice?planted?and mineral fertilizer (N:?P2O5: K2O = 0.6: 0.5: 0.8)?applied before the experiment?(RF). Inflow and effluent water from the treatments were monitored weekly. The water quality parameters monitored in this study included: total phosphorus (TP), dissolved phosphorus (PO43--P), total nitrogen (TN), ammonia-nitrogen (NH4+-N), nitrate-nitrogen (NO3--N), nitrite-nitrogen (NO2--N) and chemical oxygen demand (COD).Rice plant height?and yield were evaluated at the end of the experiment. Underdifferent fertilizer treatments, high average removal rates of TN, TP and COD were obtained (over 56, 68 and 53%, respectively). They showed no significant differences (p > 0.05), indicating that the rice field could remove the pollutants effectively and the different fertilizer treatments had no impact on the removal efficiencies. However, the different fertilizer treatments showed significant differences in rice yield (p < 0.05). The RF treatment resulted in the highest production of 649.53?± 94.2?g m-2, followed by?RK at?523.83?± 71.5?g m-2; the fertilizers increased yield by 42.93 and 15.27%, respectively over the RE trial. Rice fields can?purify pond effluents efficiently without reducing production whenappropriate?mineral fertilizers are applied.
机译：我们进行了一项实验，以评估稻田对池塘水产养殖废水的处理效率及其对不同肥料处理的响应。实验中考虑了四种处理方法：水稻种植和没有肥料输入（RE）;种植水稻并以约1.0 g m-1 d-1氯化钾的施用量（RK）和大米种植的矿物肥料（N：P2O5：K2O = 0.6：0.5：0.8 （RF）。每周监测处理过程中的流入和流出水。本研究中监测的水质参数包括：总磷（TP），溶解磷（PO43--P），总氮（TN），氨氮（NH4 + -N），硝酸盐氮（NO3--N），试验结束时，评估了水稻的株高和产量。亚硝酸盐氮（NO2--N）和化学需氧量（COD）。在不同的肥料处理下，总氮，总磷和化学需氧量的平均去除率较高（分别超过56％，68％和53％）。他们没有显着差异（p> 0.05），表明稻田可以有效地去除污染物，不同的肥料处理对去除效率没有影响。但是，不同的肥料处理方法在水稻产量上存在显着差异（p <0.05）。射频处理的最高产量为649.53？±94.2？g m-2，其后的？RK为？523.83？±71.5？g m-2。与RE试验相比，肥料的产量分别提高了42.93％和15.27％。施用适当的矿物肥料后，稻田可以有效地净化池塘污水，而不会降低产量。

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