Food safety assessment of planting patterns of four vegetable-type crops grown in soil contaminated by electronic waste activities
Food safety assessment of planting patterns of four vegetable-type crops grown in soil contaminated by electronic waste activities
复制标题
电子废物活动污染土壤中四种蔬菜作物种植模式的食品安全评估
DOI：
10.1016/j.jenvman.2011.08.021
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发表时间：
2012-01-01
影响因子：
8.7
通讯作者：
Chen, Xin
中科院分区：
文献类型：
--
作者：
Liu, Ling;Hu, Liangliang;Chen, Xin
通过田间试验，研究了电子垃圾污染土壤中作物和种植方式对作物中镉（Cd）、铅（Pb）和铜（Cu）含量的影响。作物为玉米（Zea mays L.）变种Shandong-1）、番茄（Solanum lycopersicum L.）变种中薯4号）、甘蓝（Brassica oleracea L.）变种京丰1号）、小白菜（Brassica chinensis（L.）牧野变种优冬儿-杭州）。种植模式为作物单作、作物与豆类作物共种、作物与另一种作物共种。农作物可食部分的金属浓度因金属种类和农作物而异。叶菜类蔬菜（白菜和小白菜）中Pb含量高于玉米和番茄，番茄和小白菜中Cd含量高于玉米和白菜，玉米和小白菜中Cu含量高于番茄和白菜。种植方式对可食部分重金属含量也有影响。与单作相比，混种尤其是与日本三叶草混种有利于降低Pb的积累，增加Cd的积累。根据中国国家标准局的最大允许浓度（MPC）标准，只有玉米（在所有种植模式下）可以安全食用。由于混播也会增加玉米对Cd的积累，因此，玉米单作是该污染土壤的最佳作物和种植模式。(C)2011爱思唯尔有限公司保留所有权利。
A field experiment was conducted to assess the effect of crop and planting pattern on levels of cadmium (Cd), lead (Pb), and copper (Cu) in crops grown in soil contaminated by electronic waste. The crops were maize (Zea mays L. var. Shentian-1), tomato (Solanum lycopersicum L. var. Zhongshu-4), cabbage (Brassica oleracea L. var. Jingfeng-1), and pakchoi (Brassica chinensis (L.) Makino. var. Youdonger-Hangzhou). The planting patterns were crop monoculture, crop co-planted with a legume, and crop co-planted with another crop. Metal concentrations in the edible parts of the crops varied with types of metals and crops. Pb concentration was higher in leafy vegetables (cabbage and pakchoi) than in maize or tomato, Cd concentration was higher in tomato and pakchoi than in maize or cabbage, and Cu concentration was higher in maize and pakchoi than in tomato or cabbage. Metal concentrations in the edible part were also influenced by planting pattern. Relative to monoculture, co-planting and especially co-planting with Japanese clover tended to decrease Pb accumulation and increase Cd accumulation. According to the maximum permissible concentration (MPC) standard of the National Standard Agency in China, only maize (under all planting patterns) could be safely consumed. Because co-planting tended to increase Cd accumulation even in maize, however, the results suggest that maize monoculture is the optimal crop and planting pattern for this kind of contaminated soil. (C) 2011 Elsevier Ltd. All rights reserved.