土壤调控剂对镉污染土壤植物修复效率的影响

发布时间：2018-05-30 04:08

本文选题：镉 + 油菜　；参考：《环境科学与技术》2016年S2期

【摘要】：采用土壤盆栽试验,研究了2种土壤调控剂(A:主要成分为硫磺;B:主要成分为风化煤硝基腐殖酸)对高累积镉油菜品种对污染土壤中镉的植物提取效率。高用量的风化煤硝基腐殖酸显著降低了土壤的pH值,比对照处理降低了0.21~0.26个pH单位,相应的油菜地上部镉含量增加了20.4%~33.7%。土壤调控剂A和B对第一茬油菜收获后土壤镉的提取效率为0.9%~1.1%,比对照高10.5%~31.4%;A和B对第二茬油菜收获后的土壤镉的提取效率为8.1%~10.2%,比对照分别高4.9%~32.6%。高用量的硫肥和风化煤硝基腐殖酸显著提高了两茬油菜对土壤中镉的提取效率。
[Abstract]:A pot experiment was conducted to study the extraction efficiency of two kinds of soil regulators: sulfur B and weathered coal nitro humic acid on high accumulation of cadmium in rapeseed (Brassica napus L.). The soil pH value was significantly decreased by nitrohumic acid with high amount of weathered coal, 0.21 ~ 0.26 pH units lower than that of the control, and the cadmium content in the upper part of rape field was increased by 20.4% ~ 33.7%. The extraction efficiency of soil regulators A and B for soil cadmium in the first rape harvest was 0.9 and 1.1, which was higher than that of the control. The extraction efficiency of cadmium in the second rape harvest was 8.1% and 10.2% higher than that of the control, 4.9% and 32.6% higher than that of the control, respectively. High sulfur fertilizer and weathered coal nitrohumic acid significantly improved the extraction efficiency of cadmium from soil by two crops of rape.
【作者单位】：中国农业大学资源与环境学院;
【基金】：国家自然科学基金(41471271) 国家“863”重点项目(2007AA061001)
【分类号】：X173;X53

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