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| DOI：10.13522/j.cnki.ggps.20190151 |
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| Screening of Low-accumulation Wheat Varieties with Cadmium |
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LI Lele, LIU Yuan, LI Baogui, HU Chao, FAN Tao, ZHAO Zhijuan, WU Dafu, WANG Di, LI Zhongyang
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1. Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China；2. Henan Institute of Science and Technology，Xinxiang 453003,China；3. Agro-Environmental Protection Institute, Ministry of Agriculture，Tianjin 300191,China
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| Abstract: |
| Screening of low-absorption heavy metal crop varieties has become one of the main remediation methods for heavy metal-contaminated farmland.【Objective】This study aimed to study the absorption differences of heavy metal cadmium between 47 different winter wheat varieties in the planting structure of the North China Plain, and screen the cadmium low accumulation winter wheat varieties.【Method】Field plot experiment was conducted in a area of northern part of Henan Province on October 15, 2017, which using artificial pull-and-ditch hill-seeding.【Result】The content of heavy metal cadmium in different parts of winter wheat was root>stem>seed. And the transfer coefficient and bioconcentration coefficient of cadmium were less than 1, the former ranged from 0.10 to 0.60, and the later ranged from 0.002 to 0.06. The content of heavy metals in winter wheat seeds of different varieties ranged from 0.004 ~ 0.13, with a difference of 35.28 times. And 42 species with cadmium content in seeds were selected in accordance with national standard GB2715-2016≤0.10 mg/kg, accounting for 89.36% of all varieties, and there were 5 species exceeded the national standard. Cadmium absorption of winter wheat showed great difference among different varieties.【Conclusion】 In heavy metal cadmium slightly polluted alkaline soil, the cadmium content in seeds of most winter wheat varieties did not exceed the standard. This study can provide a reference for the remediation of heavy metal contaminated soil and food production safety in the North China Plain. |
| Key words: cadmium pollution; wheat varieties; bioconcentration factor; translocation factor |
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