文章摘要
曹雪莹,谭长银,蔡润众,程学宇,刘路路,张学文,黄硕霈.植物轮作模式对镉污染农田的修复潜力[J].农业环境科学学报,2022,41(4):765-773.
植物轮作模式对镉污染农田的修复潜力
Potential of plant rotation patterns for phytoremediation of cadmium contaminated farmland
投稿时间:2021-08-30  
DOI:10.11654/jaes.2021-0990
中文关键词:   伴矿景天  积累  轮作  修复潜力
英文关键词: cadmium  Sedum plumbizincicola  accumulation  plant rotation  phytoremediation potential
基金项目:国家自然科学基金青年科学基金项目(42107018);湖南省自然科学基金青年科学基金项目(2021JJ40630);湖南省科技厅创新性省份建设专项经费资助项目(2020NK2001);长沙市自然科学基金项目(kq2007082)
作者单位E-mail
曹雪莹 长沙学院乡村振兴研究院, 长沙 410022  
谭长银 湖南师范大学地理科学学院, 长沙 410081 chytan@hunnu.edu.cn 
蔡润众 湖南师范大学地理科学学院, 长沙 410081  
程学宇 湖南师范大学地理科学学院, 长沙 410081  
刘路路 湖南师范大学地理科学学院, 长沙 410081  
张学文 长沙学院乡村振兴研究院, 长沙 410022  
黄硕霈 湖南师范大学地理科学学院, 长沙 410081  
摘要点击次数: 863
全文下载次数: 850
中文摘要:
      为探讨不同植物镉(Cd)的积累特征及对Cd污染土壤的修复潜力,筛选便于推广的中轻度Cd污染农田土壤的植物修复模式,通过田间试验,利用不同吸Cd特性的水稻、油菜、油葵和伴矿景天等植物进行组合轮作,对土壤Cd有效性、植物不同部位Cd含量、富集系数、Cd积累量及移除量进行研究。结果表明:供试植物对土壤Cd的积累能力较强,除伴矿景天外,植物不同部位Cd的富集系数为1.03~8.82,不同轮作模式两茬植物地上部Cd积累量分别为13.81~81.34 g·hm-2和21.54~74.12 g·hm-2。不同轮作模式Cd移除量表现为伴矿景天与Cd高积累品种晚稻轮作(SPOS)>伴矿景天与Cd高积累油葵轮作(SPHA)>当地主栽品种早稻与Cd高积累品种晚稻轮作(CKOS)>当地主栽品种早稻与当地主栽品种晚稻轮作(CK)>Cd高积累品种油菜与Cd高积累品种晚稻轮作(HNOS),其中最大移除量达150.34 g·hm-2。第一茬植物收获后,伴矿景天降低土壤Cd含量和有效态Cd含量的效果最好,最高分别下降了15.66%和37.14%,而第二茬植物收获后,土壤有效态Cd含量均升高了95.51%以上,有利于下一年植物的吸取修复。油菜地上部Cd积累量最低,但其土壤有效态Cd含量较试验前升高了20.00%,且油菜生长期与伴矿景天接近,因此适宜与伴矿景天间套作。综上所述,伴矿景天与高积累晚稻轮作、伴矿景天与高积累油菜间套作对中轻度Cd污染农田修复潜力较大,可作为湘中Cd污染农田修复治理的种植模式。
英文摘要:
      The accumulation of Cd in different plants and the potential of plants for phytoremediation of Cd-contaminated farmland soil were examined to screen for suitable phytoremediation models for moderate and mild Cd-contaminated farmland soil. We examined rice, oilseed rape, oil sunflower, and Sedum plumbizincicola with different Cd absorption characteristics for combined crop rotation by studying variations in the soil Cd availability, Cd content in different plant parts, enrichment factor, Cd accumulation, and Cd removal owing to the plant rotation pattern. The enrichment factor of Cd in different plant parts, except in S. plumbizincicola , and accumulation of Cd aboveground were 13.81~81.34 g · hm-2 and 21.54~74.12 g · hm-2 for different plant rotation patterns, respectively. Cd removal owing to different plant rotation patterns was in the order of SPOS(rotation of S. plumbizincicola . and Cd high accumulation variety of late rice)> SPHA(rotation of S. plumbizincicola . and Cd high accumulation variety of oil sunflower)>CKOS(rotation of local main cultivar of early rice and Cd high accumulation variety of late rice)>CK(rotation of local main cultivar of early rice and local main cultivar of late rice)>HNOS (rotation of Cd high accumulation variety of oilseed rape and Cd high accumulation variety of late rice), and the maximum amount of Cd removed was 150.34 g·hm-2. After harvest of the first crop, the Cd content and available Cd content of the soil decreased by 15.66% and 37.14%, respectively, for S. plumbizincicola . However, after the second crop was harvested, the available Cd content in the soil increased by more than 95.51%, which was conducive for the absorption and phytoremediation in the next year. Among all treatments, the amount of Cd accumulated aboveground was the lowest in oilseed rape, but the available Cd content was increased by 20.00% compared with that before the experiment; the growth period of oilseed rape was similar to that of S. plumbizincicola . In conclusion, the rotation of S. plumbizincicola and Cd high accumulation variety of late rice and Cd high accumulation variety of oilseed rape intercropping with S. plumbizincicola show potential for phytoremediation of moderate and mild Cd-contaminated farmland soil and can be used as planting modes for phytoremediation of Cd-contaminated farmland in central Hunan.
HTML    查看全文   查看/发表评论  下载PDF阅读器