黄萱草和粘草对盐渍土壤中镉的提取和转运

Ayaz Ahmad, F. Hadi, N. Ali, A. Jan
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引用次数: 3

摘要

目的:镉污染盐碱地一直是影响农业可持续发展和环境保护的重要问题。镉(Cd)是一种有害重金属,它与土壤中高盐(NaCl)的共存会降低食物质量和作物数量。为探讨镉污染土壤的盐度问题,以两种陆生植物为研究对象,研究了镉对土壤的吸收积累及其对植物生长和生物量的影响。材料和方法:在盆栽土壤中加入不同浓度的盐,NaCl (1000 ppm、3000 ppm和6000 ppm)和金属镉(50 ppm、100 ppm和150 ppm),在其中生长两种植物(萱草和粘草)。作为对照,(C)不含镉和盐,而其余三个镉浓度不同(C1=50 ppm, C2=100 ppm和C3=150 ppm)。结果与讨论:不同浓度的镉和盐对植物生物量和生长均有显著影响。6000ppm NaCl和150ppm Cd处理下,植物Cd积累量最高。粘胶杜鹃cd -生物浓度值高(大于1),而黄萱草cd -生物浓度值小于1。在钠盐中,粘草积累的Cd浓度高于黄萱草。结论:骨刺属植物在镉提取过程中具有潜在的超蓄积性,对高浓度盐具有足够的耐受性,建议在金属污染盐渍土中种植骨刺属植物,同时也可用于贫瘠土壤的保护。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Phytoextraction and Translocation of Cadmium in Saline Soil by Hemerocallis fulva and Dodonaea viscosa Plants
Purpose: Cadmium contaminated saline soil has always been a problem for sustainable agriculture and environment. Cadmium (Cd) is a noxious heavy metal and its co-occurrence with high salt (NaCl) concentrations in soil decreases quality of food and quantity of crops. For this purposes to search the salinity problems in Cd contaminated soil, its uptake and accumulation and its effect on plant growth and biomass were studied in two terrestrial plants. Materials and methods: Different concentration of salt, NaCl (1000 ppm, 3000 ppm and 6000 ppm) in combination with Cd metal (50 ppm, 100 ppm and 150 ppm) were added into pots soil, the two plants (Hemerocallis fulva and Dodonaea viscosa) were grown in it. For control (C) is used having no cadmium and salt while the remaining three with diverse concentrations of Cd (C1=50 ppm, C2=100 ppm and C3=150 ppm). Results and discussion: Plant biomass and growth were highly reduced under variable concentrations of Cd and salt in soil. Combination of 6000 ppm NaCl and 150 ppm Cd in soil demonstrated highest significant Cd accumulation in the plants. Dodonaea viscosa showed high Cd-bioconcentration value (more than one) as compared to Hemerocallis fulva having less than one. It was noted that Dodonaea viscosa plant accumulate maximum concentration of Cd in sodium salt than Hemerocallis fulva plant. Conclusion: Dodoneae plant potentially hyper accumulator and showed enough tolerance to high concentration of salt during phytoextraction of Cd. It is strongly recommended that such plants should be planted in metal contaminated saline soil and also for the conservation of barren soil.
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