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【目的】再生水和养殖废水作为农业替代水源对土壤-植物系统养分和重金属迁移规律影响的研究已有很多,但在同等试验条件下对比二者优劣的研究相对较少。【方法】利用根箱试验比较了再生水和养殖废水灌溉下土壤-植物系统养分和重金属迁移规律的差异。【结果】养殖废水灌溉处理植物生长状况优于再生水灌溉处理;再生水和养殖废水灌溉都可以增加土壤养分和植株养分,养殖废水灌溉增加幅度更大。与对照相比,土壤全 N、全 P、全 K、全Mg、有效 Fe、有效 Mn、碱解氮、有效磷、速效钾和有机质量分别增加了 4.78%、8.76%、4.33%、7.62%、19.04%、8.99%、3.55%、29.40%、14.14%、21.63%,植株根的 N、P、K、Ca、Mg 量分别增加了 49.83%、23.90%、15.44%、4.09%、8.65%;同时,养殖废水比再生水向土壤和植物体中带入了更多的重金属,尤其是 Cu 和 Zn,养殖废水处理植株根和茎 Zn 量显著增加了 102.35%和 244.49%;但再生水灌溉相比于养殖废水提高了土壤电导率,增加了土壤发生次生盐渍化的风险。【结论】养殖废水灌溉增加土壤养分和植株养分量的幅度大于再生水灌溉,但再生水灌溉会增加土壤发生次生盐渍化的风险,而养殖废水灌溉会增加土壤和植物累积重金属的风险。
【OBJECTIVE】 There are many researches on the effects of reclaimed water and farming wastewater on soil-plant system nutrient and heavy metal migration as an alternative source of water for agriculture. However, there are relatively few studies on their advantages and disadvantages under the same experimental conditions. 【Method】 Root-box test was used to compare the differences of nutrient and heavy metal transport between soil and plant system under the condition of reclaimed water and farming wastewater. 【Result】 The results showed that the growth status of aquaculture wastewater was superior to that of reclaimed water. Irrigation of reclaimed water and farming wastewater could increase soil nutrients and plant nutrients. Irrigation of aquaculture wastewater increased more greatly. Compared with the control, soil total N, total P, total K, total Mg, available Fe, available Mn, available nitrogen, available phosphorus, available potassium and organic matter increased 4.78%, 8.76%, 4.33%, 7.62% , 19.04%, 8.99%, 3.55%, 29.40%, 14.14% and 21.63% respectively. The contents of N, P, K, Ca and Mg increased by 49.83%, 23.90%, 15.44%, 4.09% and 8.65% At the same time, aquaculture wastewater brought more heavy metals, especially Cu and Zn, to the soil and plant body than reclaimed water, and the Zn content in roots and stems increased significantly by 102.35% and 244.49% compared with reclaimed water treatment. However, compared with reclaimed water irrigation Aquaculture wastewater increases soil electrical conductivity and increases the risk of soil secondary salinization. 【Conclusion】 The increase of soil nutrient and plant nutrient content by farmed wastewater is larger than that of reclaimed water irrigation. However, reclaimed water irrigation will increase the risk of secondary salinization of soil, while the irrigation of farming wastewater will increase the risk of soil and plant accumulation of heavy metals.