摘要
为了降低Cd、Pb污染菜地的食物链风险,在Cd、Pb全量及田间管理等不一致的广州市城郊菜地,进行了2个大田小区试验来研究29种常见叶菜的Cd、Pb吸收特征,并通过信息叠加法来筛选Cd、Pb低富集叶菜。结果表明,供试叶菜地上部Cd、Pb含量都没有超过我国食品中污染物限量标准,Cd在叶菜中的迁移能力较Pb强;叶菜Cd含量呈现科属亲缘特征,莴苣属和番薯属叶菜地上部Cd含量显著高于芸苔属(p<0.05)。同时筛选到3种低Cd叶菜和6种低Pb叶菜,在广州近郊菜地种植,其可食部分Cd、Pb较低。
To reduce the food chain risk for vegetable soils contaminated Cd,and/or Pb,two field trials were conducted to investigate Cd or Pb uptake by 29 varieties of familiar leaf vegetables and to screen leaf vegetables with lower Cd or Pb content by using the informational superposition method under the condition of suburb vegetable soils in Guangzhou City.The results showed that the shoot Cd or Pb content of tested vegetables was lower than the national maximum levels of contaminants in foods.Cd in the tissues of leaf vegetables transported easier than Pb.Leaf vegetables within the same genus accumulated Cd to a similar extent,shoot Cd contents in the Ipomoea and Lactuca were higher significantly（p0.05） than that in the Brassica.3 varieties of leaf vegetables were screened out with lower Cd content and 6 ones with lower Pb content as health vegetables for planting in the suburb of Guangzhou City.
出处
《土壤》
CAS
CSCD
北大核心
2011年第2期226-231,共6页
Soils
基金
广东省科技厅重大专项(2007A032303001
2008A030202002)
广东省农业领域重点专项项目(2009A0201005)
广东省自然科学基金项目(9451064001002909)资助
关键词
信息叠加法
镉
铅
叶菜
Informational superposition method
Cd
Pb
Leaf vegetable
