农业环境科学学报2011，Vol.30Issue(8)：1531-1538,8.
不同惰性有机碳物料对土壤镉赋存形态和生物有效性的影响
Effects of Materials Containing Different Inert Organic Carbon on Cd Speciation and Bio-Availability in Soil
摘要
Abstract
Pot experiments and soil incubation experiments were conducted under greenhouse conditions to investigate the effects of different organic carbon materials added into Cd-contaminated soil and Cd-amended soil on Cd speciation and bio-availability, and discussed the feasibility to improve soil Cd pollution as soil remediation agent. The results showed that soil pH reduced after three organic materials added. In Cd-contaminated soil, there were no significant differences in concentrations of NH4OAc- and DTPA-extractable Cd after three organic materials added into soil. But under the organic materials treatments in Cd -amended soil, the concentrations of NH4OAc - and DTPA -ex-tractable Cd decreased markedly, and the weathered coal addition reduced the most, rate of decline increasing with time. Content of light fraction organic matter in soil increased significantly after weathered coal and peat adding into soil and weathered coal had a stronger enrichment of soil Cd. Chemical forms of Cd in both soils were acid-extractable> reducible> oxidizable Cd. Acid-extractable Cd concentration had no significant change by adding organic material to Cd-contaminated soil, otherwise, reducible Cd concentration decreased obviously after adding peat and active carbon into soil and oxidizable Cd concentration reduced significantly under peat treatment. Acid-extractable Cd concentration decreased significantly after adding weathered coal into Cd-amended soil, but reducible Cd concentration increased obviously under active carbon treatment and oxidizable Cd concentration had no significant change under the three treatments. In Cd-contaminated soil, the three organic carbon materials had no obvious effect on maize growth but increased the Cd content of maize. Chinese cabbage biomass reduced significantly and Cd content increased obviously after weathered coal added into Cd-contaminated soil. In Cd-amended soil, there were no significant effect on Chinese cabbage and maize growth and Cd content under the three materials treatments.关键词
有机碳物料/土壤镉赋存形态/生物有效性Key words
organic carbon material/ soil Cd speciation/ bio-availability分类
资源环境引用本文复制引用
孟令阳,辛术贞,苏德纯..不同惰性有机碳物料对土壤镉赋存形态和生物有效性的影响[J].农业环境科学学报,2011,30(8):1531-1538,8.基金项目
国家自然科学基金(40971261) （40971261）
公益性行业(农业)科研专项(200903015) （农业）
