| 酸性土壤上伴矿景天铝毒的缓解技术研究 |
| |
| 引用本文： | 董蓓,周嘉文,詹娟,程新峰,周通,王雨阳,周守标,吴龙华. 酸性土壤上伴矿景天铝毒的缓解技术研究[J]. 土壤, 2022, 54(6): 1240-1246 |
| |
| 作者姓名： | 董蓓 周嘉文 詹娟 程新峰 周通 王雨阳 周守标 吴龙华 |
| |
| 作者单位： | 安徽师范大学生态与环境学院,中国科学院土壤环境与污染修复重点实验室南京土壤研究所,中国科学院土壤环境与污染修复重点实验室南京土壤研究所,安徽师范大学生态与环境学院,中国科学院土壤环境与污染修复重点实验室南京土壤研究所,中国科学院土壤环境与污染修复重点实验室南京土壤研究所,安徽师范大学生态与环境学院,中国科学院土壤环境与污染修复重点实验室南京土壤研究所 |
| |
| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目） |
| |
| 摘 要： | 酸性土壤上易产生铝（Al）毒害作用，缓解Al毒对于污染土壤上超积累植物的生长及重金属有效削减具有重要意义。本研究比较了不同措施对镉（Cd）超积累植物伴矿景天的Al胁迫缓解作用，结果发现：① 在水培条件下，锌添加可促进了Al胁迫下伴矿景天根表Cd2+吸收速率，而添加氯化钙或柠檬酸没有显著的缓解作用；② 在盆栽试验条件下，添加石灰处理显著提高了土壤pH，促进了伴矿景天生长和地上部对Cd的吸收，但添加生物质炭或柠檬酸没有显著缓解Al毒对伴矿景天生长和Cd吸收的抑制，添加柠檬酸反而加剧了土壤酸化，提高了土壤Al的活性；③在伴矿景天与荞麦间作条件下，其一定程度上降低了土壤的Al活性，在合适的种植密度下并未显著影响伴矿景天单株地上部Cd吸收量。综上，酸性土壤上耐Al作物与修复植物间作、结合添加改良剂调控Al毒，能够不显著降低土壤Cd的有效性和修复植物的Cd吸收，进而实现污染土壤的边生产边修复。
|
| 关 键 词： | 铝毒 伴矿景天 石灰 生物质炭 荞麦间作 |
| 收稿时间： | 2022-03-15 |
| 修稿时间： | 2022-04-05 |
Alleviating Aluminum Toxicity to Cadmium Hyperaccumulator Sedum plumbizincicola in Acid Soilss |
| |
| DONG Bei,ZHOU Jiawen,ZHAN Juan,CHENG Xinfeng,ZHOU Tong,WANG Yuyang,ZHOU Shoubiao,WU Longhua. Alleviating Aluminum Toxicity to Cadmium Hyperaccumulator Sedum plumbizincicola in Acid Soilss[J]. Soils, 2022, 54(6): 1240-1246 |
| |
| Authors: | DONG Bei ZHOU Jiawen ZHAN Juan CHENG Xinfeng ZHOU Tong WANG Yuyang ZHOU Shoubiao WU Longhua |
| |
| Affiliation: | School of Ecology and Environment,Anhui Normal University,CAS Key Laboratory of Soil Environment and Pollution Remediation,Chinese Academy of Sciences,Nanjing,CAS Key Laboratory of Soil Environment and Pollution Remediation,Chinese Academy of Sciences,Nanjing,School of Ecology and Environment,Anhui Normal University,CAS Key Laboratory of Soil Environment and Pollution Remediation,Chinese Academy of Sciences,Nanjing,CAS Key Laboratory of Soil Environment and Pollution Remediation,Chinese Academy of Sciences,Nanjing,School of Ecology and Environment,Anhui Normal University,CAS Key Laboratory of Soil Environment and Pollution Remediation,Chinese Academy of Sciences,Nanjing |
| |
| Abstract: | Aluminum (Al) toxicity often occurs in acid soils. Therefore, the alleviation of Al toxicity in acid soils is of great significance for the normal growth and efficient metal removal by hyperaccumulators. This study compared the efficiencies of different strategies to relieve Al stress on the cadmium (Cd) hyperaccumulator Sedum plumbizincicola. Our results showed that in the hydroponic experiment, Zn addition significantly enhanced root Cd2+ uptake rate by S. plumbizincicola under Al stress while adding CaCl2 or citric acid to solution showed no significant effect on root Cd2+ uptake. In the pot experiment, adding lime significantly increased soil pH, and enhanced the growth and shoot Cd uptake of the hyperaccumulating plant. However, adding rice biochar or maize biochar or citric acid in soil did not significantly relieve the inhibition of plant growth and Cd uptake raised by Al stress. In contrast, adding citric acid aggravated soil acidification. Agricultural strategy of intercropping with S. plumbizincicola and buckwheat was also used to alleviate Al stress. This decreased soil Al activity to some extent and did not significantly affected shoot Cd uptake per plant by S. plumbizincicola with appropriate planting density. Above all, using a combined strategy of intercropping with the hyperaccumulator and Al-tolerant crop and the application of soil amendment to alleviate Al toxicity will not significantly decrease soil Cd availability and plant Cd uptake, thus realizing remediation and crop production simultaneously in Al-stressed soils. |
| |
| Keywords: | Aluminum toxicity Sedum plumbizincicola Lime Biochar Intercropping with buckwheat |
|
| 点击此处可从《土壤》浏览原始摘要信息 |
|
点击此处可从《土壤》下载全文 |
|
