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陶玲, 彭格格, 陈思媛, 郝柳柳, 代梨梨, 彭亮, 李谷. 稻田湿地循环利用池塘养殖尾水效果[J]. 水生生物学报, 2022, 46(10): 1466-1474. doi: 10.7541/2022.2022.0178
引用本文: 陶玲, 彭格格, 陈思媛, 郝柳柳, 代梨梨, 彭亮, 李谷. 稻田湿地循环利用池塘养殖尾水效果[J]. 水生生物学报, 2022, 46(10): 1466-1474. doi: 10.7541/2022.2022.0178
TAO Ling, PENG Ge-Ge, CHEN Si-Yuan, HAO Liu-Liu, DAI Li-Li, PENG Liang, LI Gu. EFFECT OF RECYCLING FISHPOND WASTEWATER IN PADDY WETLAND[J]. ACTA HYDROBIOLOGICA SINICA, 2022, 46(10): 1466-1474. doi: 10.7541/2022.2022.0178
Citation: TAO Ling, PENG Ge-Ge, CHEN Si-Yuan, HAO Liu-Liu, DAI Li-Li, PENG Liang, LI Gu. EFFECT OF RECYCLING FISHPOND WASTEWATER IN PADDY WETLAND[J]. ACTA HYDROBIOLOGICA SINICA, 2022, 46(10): 1466-1474. doi: 10.7541/2022.2022.0178

稻田湿地循环利用池塘养殖尾水效果

EFFECT OF RECYCLING FISHPOND WASTEWATER IN PADDY WETLAND

  • 摘要: 文章将稻田和鱼塘有机结合构建循环水养殖系统, 连续两年开展了稻田湿地循环利用池塘养殖尾水效果的研究, 同时应用Biolog Eco微平板技术比较了进出稻田湿地水样中微生物群落功能多样性变化特征。结果表明, 在水力负荷0.51和0.74 m/d条件下, 稻田湿地对池塘养殖尾水中\rmNH^+_4 -N、\rmNO^-_2 -N、TN、TP和CODMn的百分比去除率分别为2.94%—33.38%、12.60%—92.45%、16.06%—32.36%、23.34%—48.50%和15.37%—61.12%, 稻田湿地出水DO含量显著提高。通过稻田湿地对池塘养殖尾水中氮磷等营养物质的循环利用, 养殖池塘尾水中TN、TP和CODMn的排污系数相应降低0.71—3.03、0.27—0.31和4.19—8.81 kg/t。Biolog Eco微平板技术揭示稻田湿地进出水中微生物群落碳源利用特征发生明显变化, 出水微生物碳源代谢功能多样性指数显著提高; 在生产功能上, 循环水养殖系统中循环塘养殖产量比对照塘提高22%以上, 而且水稻平均产量达到9239 kg/hm2。由此表明, 稻田-鱼塘两种具有互补功能的人工湿地耦合形成了一种新的复合系统, 该系统在渔农混作区具有一定应用推广价值。

     

    Abstract: The environmental concern and safety of pond aquaculture has become an important factor restricting the development of freshwater aquaculture in China. Research and development of efficient, ecological, safe and healthy culture technology and showcase has become an important development direction of domestic and foreign fishery production. In line with the ecological engineering of paddy fields, the integrated paddy-pond recirculating ecological system was constructed. In the system, the paddy field acted as the production unit, meanwhile it worked as a water and nutrient recycling purification unit. In this paper, the treatment efficiencies of the wastewater from a fishpond by a paddy field wetland, and rice and fish production potentials were evaluated for two consecutive years. Biolog Eco micro-plate technology was used to compare the metabolic structure and diversity of microbial community in the inflow and outflow of the paddy field wetland. The results showed that under the hydraulic loads of 0.51 and 0.74 m/d, the overall percent removal rates of \rmNH^+_4 -N, \rmNO^-_2 -N, TN, TP and CODMn by the paddy field wetland were 2.94%—33.38%, 12.60%—92.45%, 16.06%—32.36%, 23.34%—48.50% and 15.37%—61.12%, respectively. The content of DO in outflow of the paddy field wetland was significantly increased. Paddy wetland retained nitrogen and phosphorus from pond culture wastewater. Therefore, the pollution discharge coefficient of TN, TP and CODMn of wastewater from the pond culture decreased by 0.71—3.03, 0.27—0.31 and 4.19—8.81 kg/t, respectively. The carbon source utilization characteristics of microbial communities in the inflow and outflow of the paddy wetland were changed, while the metabolic functional diversity index of microbial communities in the outflow were significantly higher than that in the inflow which was beneficial for the fish pond culture. Fish yield in the pond of the recirculating aquaculture system increased by more than 22%, while the rice yield reached 9239 kg/hm2 in the system. These results probably implied that the rice field exhibited efficient treatment effect and nutrient recycling effect of wastewater from aquaculture pond and the integrated paddy-pond system could provide more food. The new recirculating planting-culture ecosystem integrating rice and fish production system could be regarded as a clean and sustainable food production system from an environmental point of view and be applied in rural areas of China where crop breeding and fish culture coexist.

     

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