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首页> 外文期刊>Agricultural Water Management >Impact of irrigation with treated low quality water on the heavy metal contents of a soil-crop system in Serbia. (Special Issue: SAFIR - safe and high quality food production using low quality waters and improved irrigation systems and management.)
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Impact of irrigation with treated low quality water on the heavy metal contents of a soil-crop system in Serbia. (Special Issue: SAFIR - safe and high quality food production using low quality waters and improved irrigation systems and management.)

机译：塞尔维亚处理过的劣质水灌溉对土壤-作物系统中重金属含量的影响。 （特刊：SAFIR-使用劣质水和改进的灌溉系统及管理来实现安全优质的食品生产。）

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摘要

Water availability for irrigation is a limiting factor for agriculture in Mediterranean countries. An upcoming strategy for increasing water supply is to use treated wastewater for irrigation. A principal drawback of irrigating with wastewater is the potential heavy metal accumulation in soil and foodstuff. Accumulation of heavy metals in soil and potato plants (Solanum tuberosum L.) irrigated with treated low quality surface water was studied in a three years experiment. The low quality surface water used for irrigation experiments contained a significant proportion of urban sewage and was spiked with selected heavy metals (Cd, Cr, Cu, Pb) and arsenic before treatment for years 2 and 3. The experiments were carried out during the growing seasons of 2006, 2007 and 2008 on a humogley soil of a commercial vegetable farm, 10 km north of Belgrade, Serbia. The growing seasons started in April/May and finished in August. Irrigation water was treated using (1) a conventional sand filter treatment, and (2) a sand filter combined with a specific filter for heavy metal removal treatment. Irrigation water composition was highly variable and cases both of enrichment and depletion of the measured inorganic trace elements were observed in the treated water, compared to the low quality feed water. In spite of this variability of the irrigation water composition, the soil contents in inorganic elements at the end of the three irrigation years are similar to the initial state. After the third harvest, no impact of the irrigation water on potato quality could be detected except for total sugar and sugar in total solids. Statistical tests (ANOVA) were performed to assess similarities between the different set of samples. The principal conclusion of this investigation is that, when appropriately treated, low quality feed waters with high heavy metal contents can be used for irrigation over several years without significant degradation of soil and produces. Even though, long-term cumulative effects in other pedologic and hydroclimatic settings, irrigation and cropping conditions cannot be excluded.
机译：灌溉用水是地中海国家农业生产的限制因素。增加供水的一项即将到来的策略是使用处理后的废水进行灌溉。用废水灌溉的主要缺点是土壤和食物中可能存在重金属积累。在一项为期三年的实验中，研究了用处理过的劣质地表水灌溉的土壤和马铃薯植物（马铃薯）中重金属的积累。用于灌溉实验的劣质地表水含有大量城市污水，并在处理第2年和第3年之前掺入了精选的重金属（Cd，Cr，Cu，Pb）和砷。该实验在生长期间进行塞尔维亚贝尔格莱德以北10公里的商业蔬菜农场的哈莫格利土壤上的2006、2007和2008年两个季节。生长季节始于四月/五月，八月结束。使用（1）常规砂滤器处理和（2）砂滤器与特定滤器组合进行重金属去除处理来处理灌溉水。灌溉水的组成变化很大，与低质量的给水相比，在处理过的水中观察到了富集和耗尽的无机痕量元素。尽管灌溉水成分存在这种变化，但三个灌溉年末无机元素中的土壤含量与初始状态相似。在第三次收获后，除了总糖和总固体中的糖以外，没有发现灌溉水对马铃薯质量的影响。进行统计检验（ANOVA）以评估不同样本集之间的相似性。这项调查的主要结论是，经过适当处理后，具有高重金属含量的劣质给水可在数年内用于灌溉，而不会严重破坏土壤和农产品。即使在其他小气候和水文气候条件，灌溉和耕种条件下的长期累积影响也不能排除。

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