研究报告
陈小米,胡国涛,杨兴,叶正钱,吴晓红,王海龙.速生树种竹柳对复合污染土壤中镉和锌的吸收、积累与生理响应特性[J].环境科学学报,2017,37(10):3968-3976
速生树种竹柳对复合污染土壤中镉和锌的吸收、积累与生理响应特性
- Heavy metal accumulation and physiological response of bamboo-willow plants to soil co-contaminated with Cd and Zn
- 基金项目：国家自然科学基金面上项目（No.21577131）；浙江省自然科学基金重点项目（No.LZ15D010001）；浙江省新苗人才计划项目（No.2016R412002）；浙江省土壤污染生物修复重点实验室开放基金课题（No.FSLAB2016009）
- 作者
- 单位
- 陈小米
- 1. 浙江省土壤污染生物修复重点实验室, 临安 311300;2. 浙江农林大学集贤学院, 临安 311300
- 胡国涛
- 金正大生态工程集团股份有限公司, 临沭 276700
- 杨兴
- 1. 浙江省土壤污染生物修复重点实验室, 临安 311300;4. 浙江农林大学环境与资源学院, 临安 311300
- 叶正钱
- 1. 浙江省土壤污染生物修复重点实验室, 临安 311300;4. 浙江农林大学环境与资源学院, 临安 311300
- 吴晓红
- 浙江绿鑫晨农业开发有限公司, 龙游 324400
- 王海龙
- 1. 浙江省土壤污染生物修复重点实验室, 临安 311300;6. 佛山科学技术学院环境与化学工程学院, 佛山 528000
- 摘要：为探讨竹柳在重金属复合污染（镉、锌）土壤中生长的生理变化及重金属在植株内的转移情况，以竹柳（Salix sp.）三号及竹柳五号为试验材料，以重金属复合污染的水稻土为供试土壤，通过盆栽试验研究了重金属对竹柳生理指标、重金属吸收与积累量、富集系数（BCF）和转运系数（TF）的影响.结果表明：竹柳各器官重金属含量和转移情况不同，其中，叶片中Cd、Zn含量最高，分别达61.4和1940 mg·kg-1；竹柳三号对Zn的转运能力大于竹柳五号，而竹柳五号的净光合速率更高；生长100 d后，重金属在竹柳叶片中的积累量和转移系数均高于其他部位，竹柳吸收的重金属主要分布在叶片中，可通过集中处理叶片达到去除土壤中重金属污染的目的.
- Abstract：A pot experiment was carried out to investigate the physiological responses of bamboo-willow (Salix sp.) and the uptake and transfer of heavy metals in plants grown in soils contaminated with cadmium (Cd) and zinc (Zn). Two bamboo-willow cultivars, bamboo-willow Ⅲ and bamboo-willow V were grown in two soils with different Cd and Zn concentrations. Selected physiological parameters and concentration of heavy metals in different organs were determined, and the bio-concentration factor (BCF) and translocation factor (TF) were calculated. Results showed that the concentration of heavy metals and their translocation varied in different organs. The highest concentrations of Cd and Zn were observed in the leaves, which reached 61.4 and 1940 mg·kg-1, respectively. The Zn translocation factor of bamboo-willow Ⅲ was greater than that of bamboo-willow V, whereas bamboo-willow Ⅲ had a higher photosynthetic rate than bamboo-willow V. After a 100-day growth period, the accumulation and translocation factor of heavy metals in the leaves of bamboo-willow were higher than in other organs. The heavy metals taken up by bamboo-willow plants were mainly distributed in the leaves. Therefore, heavy metals in soil may be removed through harvesting the bamboo-willow leaves.
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