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| Comparison of three types of hydroponics methods in screening for low arsenic uptake lettuces |
| Received:September 22, 2017 |
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| KeyWord:arsenic;hydroponics;lettuce;low uptake |
| Author Name | Affiliation | E-mail | | ZHANG Qian | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing 100081, China | | | ZENG Xi-bai | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing 100081, China | zengxibai@caas.cn | | BAI Ling-yu | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing 100081, China | | | WANG Ya-nan | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing 100081, China | | | SU Shi-ming | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing 100081, China | | | WU Cui-xia | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing 100081, China | |
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| Abstract: |
| In order to accurately and efficiently compare the low arsenic uptake capabilities of vegetables and to build up appropriate screening methods, the As uptake capabilities of five lettuce(var. ramosa Hort.) varieties were studied by using three hydroponics methods:vigorous growth period, whole growth period, and short-term stress uptake. Pot experiments were conducted as the reference method to verify the feasibility of the tested hydroponics methods. The results indicated that the As uptake capacities of the five lettuce varieties via the vigorous growth and whole growth period methods were basically identical with the results of the pot experiments. The variation of As content in the aboveground biomass of the five lettuce varieties between the vigorous growth period and the whole growth period methods showed no difference. However, no significant differences in arsenic content between lettuce varieties were observed in the short-term stress absorption method. The As concentration in the aboveground biomass of the Ziluoma lettuce was the lowest among all varieties, at 0.42 mg·kg-1 and 0.77 mg·kg-1 in the slight and middle As-contaminated soils, respectively. The capacities of As uptake from high to low were in the order:Naichoutai, Lvluo, Meiguodasusheng, Luoshalv, and Ziluoma. The hydroponics method of vigorous growth can be used to screen low As uptake vegetables. |
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