北京师范大学学报（自然科学版）2018，Vol.54Issue(1)：48-55,8.DOI:10.16360/j.cnki.jbnuns.2018.01.007
黄河三角洲农田土壤-作物系统重金属污染风险评估
Assessment of the heavy metal pollution risks in soil-crop systems of farmlands in the Yellow River Delta
摘要
Abstract
Heavy-metal pollution threatens the quality and quantity of agricultural products worldwide, especially with rapid economic development and population growth. We collected topsoil samples and aboveground crops from farmlands in the Yellow River Delta to measure their concentrations of heavy metals Cr,Cu,Pb.Concentrations of three heavy metals were significantly different and showed medium spatial variations.Cr (47.20 mg·kg-1 )showed the highest concentration,followed by Cu (26.00 mg·kg-1 )and Pb (13.90 mg·kg-1 ).Heavy metal pollution indexes in soils of wheat and paddy fields were significantly higher than those in maize fields and in lotus sediments.All indexes were found to be below 0.7,showing that heavy metal pollution was in a clean status.These metals more or less all accumulated in aboveground parts of crops. Bio-concentration factor of Cu was the highest,but no significant differences were found between the other two metals.Bio-concentration factors in different crops were different.Maize showed the highest absorption of Cr and Cu,and rice had the highest ability to absorb Pb.These findings provide valuable information for sustainable agriculture in the Yellow River Delta.关键词
黄河三角洲/土壤-作物系统/重金属/污染风险Key words
Yellow River Delta/soil-crop system/heavy metal/p ollution risk分类
资源环境引用本文复制引用
蔡燕子,谢湉,于淑玲,王青,闫秋如,邵晓静,张希涛,崔保山..黄河三角洲农田土壤-作物系统重金属污染风险评估[J].北京师范大学学报（自然科学版）,2018,54(1):48-55,8.基金项目
国家自然科学基金重点资助项目(51639001) （51639001）
国家重点基础研究发展计划(973 计划)资助项目(2013CB430406) （973 计划）
国家水体污染控制与治理科技重大专项资助项目(2009ZX07209-008-03,2009ZX07209-008-04) （2009ZX07209-008-03,2009ZX07209-008-04）
