Abstract

Irrigation of plants by contaminated water with metals is very common in countries facing freshwater scarcity. To enhance plant growth via improved absorption of essential metals including Zn from wastewater the magnetization of water as a modern approach, can be used. With the aim of investigating the effects of brown coal application and magnetizing contaminated water on the absorption of Zn and the yield of maize, a greenhouse experiment was conducted. The experiment was factorial arranged in a completely randomized design with four levels of brown coal (0, 1, 2, and 4% w/w), and 5 types of irrigation water (distilled water, water contaminated with Cu-sulfate, water contaminated with Cu-nitrate, magnetized water contaminated with Cu-sulfate, and magnetized water contaminated with Cu-nitrate). Maize was irrigated according to the treatments of irrigation types, so that the total concentration of Zn added to the pots receiving Zn-contaminated water reached 1200 mg kg⁻¹ at the end of experiment. Results showed that plants irrigated with Zn contaminated water significantly increased shoot dry matter yield, as compared to that of control treatment, due to high buffering capacity of the studied calcareous soil for stabilization of Zn. Magnetized water significantly increased mean shoot and root Zn uptake, uptake efficiency, phytoextraction efficiency, translocation factor, and translocation efficiency. Due to the improvement of Zn uptake by maize following the use of magnetized water, it is tentatively concluded that magnetization of waters with high level of Zn may be used for correcting Zn deficiency in calcareous soils.

摘要

在面临淡水短缺的国家，用受金属污染的水灌溉植物非常普遍。为了通过改善从废水中吸收包括锌在内的必需金属来促进植物生长，可以使用水的磁化作为一种​​现代方法。为研究施用褐煤和磁化污染水对锌的吸收和玉米产量的影响，进行了温室试验。试验采用完全随机设计的因子安排，四种水平的褐煤（0、1、2 和 4% w/w）和 5 种灌溉水（蒸馏水、受硫酸铜污染的水、受污染的水）硝酸铜、被硫酸铜污染的磁化水和被硝酸铜污染的磁化水）。^-1在实验结束时。结果表明，与对照处理相比，用受锌污染的水灌溉植物显着增加了地上部干物质产量，这是由于所研究的钙质土壤对锌的稳定具有高缓冲能力。磁化水显着提高了地上部和根部对锌的平均吸收、吸收效率、植物提取效率、易位因子和易位效率。由于使用磁化水后玉米对锌的吸收有所改善，因此初步得出结论，高锌水的磁化可用于纠正钙质土壤中的锌缺乏。