土壤性质对钼对三种土壤无脊椎动物毒性的影响。

The influence of soil properties on the toxicity of molybdenum to three species of soil invertebrates.

机构信息

Department of Animal Ecology, Faculty of Earth and Life Sciences, VU University, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands.

出版信息

Ecotoxicol Environ Saf. 2011 Jan;74(1):1-9. doi: 10.1016/j.ecoenv.2010.10.001. Epub 2010 Oct 15.

DOI:10.1016/j.ecoenv.2010.10.001

PMID:20951431

Abstract

Mo toxicity to earthworms (Eisenia andrei), Collembola (Folsomia candida) and enchytraeids (Enchytraeus crypticus) was determined in 10 European soils and a standard artificial soil, freshly spiked with Na(2)MoO(4), after 28 days exposure. Mo affected survival only in three low pH sandy soils; in all other soils LC50 was >3200 mg Mo/kg dry soil. EC50 values for the reproduction toxicity of Mo were 129-2378 mg/kg for earthworms, 72->3396 mg/kg for Collembola, and 301->2820 mg/kg for enchytraeids. Variation in toxicity among soils could not be explained by differences in available (pore water, water and 0.01 M CaCl(2) extractable) Mo concentrations. Clay content best predicted the EC50 for Mo toxicity to earthworms, while toxicity of Mo for enchytraeids was best described by soil pH. For Collembola no relationships could be derived due to the absence of toxicity in most soils. Soil properties had a strong but species-specific effect on Mo toxicity to soil invertebrates.

摘要

采用新鲜添加的钼酸钠（Na2MoO4）对 10 种欧洲土壤和一种标准人工土壤进行 28 天暴露后，测定了钼对蚯蚓（赤子爱胜蚓）、弹尾目（弗氏真土跳虫）和线蚓目（真圆线蚓）的毒性。只有在 3 种低 pH 沙土中，钼才会影响生物存活；在所有其他土壤中，LC50 均大于 3200mg Mo/kg 干土。钼对蚯蚓的繁殖毒性的 EC50 值为 129-2378mg/kg，对弹尾目的 EC50 值为 72->3396mg/kg，对线蚓目的 EC50 值为 301->2820mg/kg。土壤间毒性的差异不能用有效态（孔隙水、水和 0.01 M CaCl2 可提取态）钼浓度的差异来解释。土壤的粘粒含量可最佳预测钼对蚯蚓的 EC50 值，而土壤 pH 则可最佳描述钼对线蚓目的毒性。由于大多数土壤中没有毒性，因此无法推导出对弹尾目有毒性的关系。土壤性质对土壤无脊椎动物的钼毒性具有强烈的、但具物种特异性的影响。