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| Effect of film mulching on plant growth and cadmium uptake by Sedum plumbizincicola |
| Received:August 10, 2018 |
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| KeyWord:Sedum plumbizincicola;film mulching;cadmium;plant uptake |
| Author Name | Affiliation | E-mail | | YIN Zhi-yao | Yonker Environmental Protection Co., Ltd., Changsha 410330, China | | | HE Jun-qiang | Yonker Environmental Protection Co., Ltd., Changsha 410330, China | | | QIN hua | Yonker Environmental Protection Co., Ltd., Changsha 410330, China | | | LIU Dai-huan | Yonker Environmental Protection Co., Ltd., Changsha 410330, China
National Engineering Laboratory of Soil Pollution Control and Remediation Technologies, Nanjing 210008, China | 36882233@qq.com | | DENG Lin | Yonker Environmental Protection Co., Ltd., Changsha 410330, China | | | CHANG Hai-wei | Yonker Environmental Protection Co., Ltd., Changsha 410330, China | | | GUI Juan | Yonker Environmental Protection Co., Ltd., Changsha 410330, China | | | LI Zhu | National Engineering Laboratory of Soil Pollution Control and Remediation Technologies, Nanjing 210008, China | | | ZHOU Tong | National Engineering Laboratory of Soil Pollution Control and Remediation Technologies, Nanjing 210008, China | |
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| Abstract: |
| In order to determine the effect of plastic film mulching on the growth and Cd uptake of Sedum plumbizincicola, which is a Cd and Zn hyperaccumulator, a fallow field located in Hunan Province was selected, S. plumbizincicola plant seedlings were transplanted, the dynamics of plant biomass and shoot Cd concentration after transplanting were determined during all growth stages, and the amount of Cd uptake was calculated. The results showed that the single-plant fresh and dry weight of S. plumbizincicola increased very quickly during 157~214 days after transplanting (the increase rates of fresh weight of each plant for the film mulching and no film mulching treatment were 3.92 g·d-1 and 3.25 g·d-1, respectively; the increase rates of dry weight were 0.23 g·d-1 and 0.17 g·d-1, respectively). With the increase in growth time, shoot Cd concentration decreased at the early stage, increased gradually, and then decreased again at the last growth stage. However, the Cd uptake amount increased at all stages. The effect of mulching on average daily Cd uptake was the greatest during the range of 30~63 days, which was 3.62 g·hm-2·d-1 and 3.10 g·hm-2·d-1 for the film mulching and no film mulching field treatment, respectively. The two lowest average daily Cd uptake stages were in the range of 0~30 days (0.90 g·hm-2·d-1 and 0.26 g·hm-2·d-1, respectively) and 214~240 days (0.20 g·hm-2·d-1 and 0.25 g·hm-2·d-1, respectively). Under the film mulching and no film mulching field treatment, the total Cd uptake by S. plumbizincicola was 447.00 g·hm-2 and 329.85 g·hm-2, respectively, and the soil Cd removal rate was 16.18% and 12.16%, respectively. In general, compared with the no film mulching field treatment, film mulching significantly increase plant biomass, Cd uptake, and the soil Cd removal rate by S. plumbizincicola. |
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