Recovery of soil nitrification after long-term zinc exposure and its co-tolerance to Cu in different soils
Recovery of soil nitrification after long-term zinc exposure and its co-tolerance to Cu in different soils
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DOI：
10.1007/s11356-014-3338-1
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发表时间：
2014
影响因子：
5.8
通讯作者：
Aiju Liu;Dianmei Fang;Chao Wang;Menghong Li;Robert B. Young
中科院分区：
文献类型：
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作者：
Aiju Liu;Dianmei Fang;Chao Wang;Menghong Li;Robert B. Young
以中国不同地区的土壤样品为研究对象，研究了土壤微生物多样性及其对土壤硝化作用恢复的影响。10个处理或不与ZnCl 2修正。随后，穗上穗试验，以测试土壤硝化作用的耐受性锌（Zn）和铜（Cu）。最初，锌修正案完全抑制硝化作用。经过一年的锌暴露，恢复潜在的硝化速率在锌修正的土壤范围从28至126%的潜在硝化速率在相应的锌nonamended土壤。这种恢复是密切相关的潜在硝化速率前锌修正案和土壤pH值。增加锌耐受性的土壤硝化反应一致观察到相应的土壤污染。在所有1，000-mg kg− 1 Zn改良的土壤中获得了对Cu的共耐受性。这种耐受性也密切相关的潜在硝化速率前锌修正案和土壤pH值。我们的数据表明，固有的微生物活性可以是一个重要的因素，用于恢复来自金属污染的土壤功能。
Soils sampled from different locations of China were used to manipulate soil microbial diversity and to assess the effect of the diversity of the soil nitrifying community on the recovery of the soil nitrification to metal stress (zinc). Ten treatments were either or not amended with ZnCl2. Subsequently, a spike-on-spike assay was set up to test for the tolerance of soil nitrification to zinc (Zn) and copper (Cu). Initially, Zn amendment completely inhibited nitrification. After a year of Zn exposure, recovery of the potential nitrification rate in Zn-amended soils ranged from 28 to 126 % of the potential nitrification rate in the corresponding Zn-nonamended soils. This recovery was strongly related to the potential nitrification rate before Zn amendment and soil pH. Increased Zn tolerance of the soil nitrification was consistently observed in response to corresponding soil contamination. Co-tolerance to Cu was obtained in all 1,000-mg kg−1Zn-amended soils. This tolerance was also strongly related to the potential nitrification rate before Zn amendment and soil pH. Our data indicate that inherently microbial activity can be a significant factor for the recovery of soil functioning derived from metal contamination.