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| Accumulation and translocation of cadmium in different wheat cultivars in farmland |
| Received:June 07, 2017 |
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| KeyWord:farmland;wheat varieties;cadmium;translocation;bio-concentration |
| Author Name | Affiliation | E-mail | | XIONG Zi | Ministry of Agriculture Key Laboratory of Crop Nutrition and Fertilization, Agricultural Resources and Regional Planning Institute of Chinese Academy of Agricultural Sciences, Beijing 100081, China | | | LI Ju-mei | Ministry of Agriculture Key Laboratory of Crop Nutrition and Fertilization, Agricultural Resources and Regional Planning Institute of Chinese Academy of Agricultural Sciences, Beijing 100081, China | lijumei@caas.cn | | ZHAO Hui-wei | The Semi-arid Agriculture Science and Technology Research Center of China, Shijiazhuang 050051, China | | | MA Yi-bing | Ministry of Agriculture Key Laboratory of Crop Nutrition and Fertilization, Agricultural Resources and Regional Planning Institute of Chinese Academy of Agricultural Sciences, Beijing 100081, China | |
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| Abstract: |
| It is relatively easy for wheat to absorb cadmium(Cd) from the soil, resulting in high Cd levels in the seeds. Preferential selection of low Cd wheat varieties is important for the production of safe wheat production in Cd-contaminated areas. For the selection of low Cd wheat varieties, a study on Cd absorption, transport and enrichment ability by different wheat varieties was carried out. A total of 59 wheat varieties were collected in the field, and a total of 91 pairs of soils and grains, and stems and leaves, were collected from nine wheat planting areas of the Huanghuaihai Plain, and the Cd content in soil, wheat stems, leaves, and grain were analyzed, and the stem and leaf translocation factor(TF) and grain bioconcentration factor(BCF) were calculated. The results showed that the surface soil Cd content was low,with a range of 0.107~0.212 mg·kg-1; Jiyuan's soil Cd content exceeded the standard, up to 2.292 mg·kg-1. The grain Cd content in wheat varieties ranged from 0.005~0.030 mg·kg-1(Jiyuan:0.119~0.150 mg·kg-1), with an average of 0.016 mg·kg-1(except Jiyuan). The variation range of TF was 0.093~0.500, with a 4.4 folds difference between extremes.The range of BCF change was 0.047~0.165, with a 2.5 folds difference between extremes. Using a cluster analysis, the Cd BCF values of different wheat varieties were divided into five categories, and 29 wheat varieties with low Cd concentrations were identified, which were Ji Mai 518, Heng 0628, Heng 09 Guan 29. Based on the results of the BCF calculation, on the premise that the Cd content in grain should not exceed the standard of food safety limits, 59 wheat varieties could be planted in grade two Cd-contaminated soil prescribed by the state. Among them, 27 wheat varieties could also be planted in grade three Cd-contaminated soil. |
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