title: Application of a rotation system to oilseed rape and rice fields in Cd-contaminated agricultural land to ensure food safety.
abstract: This field experiment analyzed the phytoremediation effects of oilseed rape in moderately cadmium (Cd)-contaminated farmland and the food safety of successive rice in an oilseed rape-rice rotation system. Two oilseed rape cultivars accumulated Cd at different rates. The rapeseed cultivar Zhucang Huazi exhibited high Cd accumulation rates, higher than the legal limit for human consumption (0.2mgkg(-1)); Cd concentrations in the cultivar Chuanyou II-93 were all below the maximum allowed level. Planting oilseed rape increased the uptake of Cd by the successive rice crop compared with a previous fallow treatment. Most Cd concentrations of brown rice were below the maximum allowed level. The phytoextraction efficiency was lower in the moderately Cd-contaminated soil in field experiments. The results suggest screening rice cultivars with lower Cd accumulation can assure the food safety; the mobilization of heavy metals by roots of different plant species should be considered during crop rotation to assure food safety.
authors.affiliation: Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, People׳s Republic of China.
authors.forename: Lingling
authors.initials: L
authors.lastname: Yu
authors.affiliation: Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, People׳s Republic of China.
authors.forename: Junyan
authors.initials: J
authors.lastname: Zhu
authors.affiliation: Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, People׳s Republic of China.
authors.forename: Qingqing
authors.initials: Q
authors.lastname: Huang
authors.affiliation: Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, People׳s Republic of China.
authors.forename: Dechun
authors.initials: D
authors.lastname: Su
authors.affiliation: Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, People׳s Republic of China.
authors.forename: Rongfeng
authors.initials: R
authors.lastname: Jiang
authors.affiliation: Key Laboratory of Plant-Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, People׳s Republic of China. Electronic address: lihuafen@cau.edu.cn.
authors.forename: Huafen
authors.initials: H
authors.lastname: Li
mesh_terms: D000383:Agriculture / Q000379:methods*; D001673:Biodegradation, Environmental; D001937:Brassica / Q000254:growth & development / Q000378:metabolism*; D002104:Cadmium / Q000032:analysis / Q000378:metabolism*; D004787:Environmental Pollution; D059022:Food Safety; D006801:Humans; D012275:Oryza / Q000378:metabolism*; D018517:Plant Roots / Q000378:metabolism; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*
chemical_list: D012989:Soil Pollutants; D002104:Cadmium
keywords: Brassica juncea L.; Cd pollution; Crop rotation; Cultivar selection; Oryza sativa L.