| 磷灰石、石灰对Cd胁迫下黑麦草根形态及Cd吸收影响研究 |
| |
| 引用本文： | 杜志敏,向凌云,杜凯敏,杨文玲,王继雯,雷高,郭雪白,郭亮,周静,巩涛,陈国参,甄静.磷灰石、石灰对Cd胁迫下黑麦草根形态及Cd吸收影响研究[J].农业环境科学学报,2021,40(1):92-101. |
| |
| 作者姓名： | 杜志敏 向凌云 杜凯敏 杨文玲 王继雯 雷高 郭雪白 郭亮 周静 巩涛 陈国参 甄静 |
| |
| 作者单位： | 河南省科学院生物研究所有限责任公司,郑州 450008;河南工业大学环境工程学院,郑州 450001;河南省科学院生物研究所有限责任公司,郑州 450008;河南省河川工程监理有限公司,郑州 450000;河南水利与环境职业学院,郑州 450008;中国科学院南京土壤研究所,南京 210008 |
| |
| 基金项目： | 国家自然科学基金项目（32001206，31800361）；河南省重点研发与推广专项（212102310227）；河南省科学院科研开发专项（210605007，210905004，200605005，190305003） |
| |
| 摘 要： | 为考察磷灰石、石灰和黑麦草对Cd污染土壤的修复效果,通过盆栽试验研究了不同剂量磷灰石(0、6、12、24 g·kg^-1风干土,编号为CK、L1、L2、L3)和石灰(1、2、4 g·kg^-1风干土,编号为S1、S2、S3)对Cd胁迫下黑麦草生物量、根形态、黑麦草Cd含量、Cd富集量、富集系数、土壤pH、土壤有效态Cd含量等的影响。结果表明,磷灰石、石灰处理(L1,S1除外)显著增加了黑麦草生物量、根长、根表面积、根体积、根尖数、Cd富集量和土壤pH,显著降低了黑麦草Cd含量、Cd富集系数、根平均直径和土壤有效态Cd含量。相关性分析结果表明:除根平均直径为正相关关系外,黑麦草根长、根表面积、根体积、根尖数与土壤有效态Cd含量、黑麦草地上部分及根系Cd含量、Cd富集系数呈显著或极显著负相关关系;除根平均直径为负相关关系外,其他根指标与黑麦草地上部分及根系生物量、Cd富集量呈极显著正相关关系。其中,L3处理黑麦草地上部分及根系生物量达到CK处理(不添加改良剂)的176.0倍和174.4倍;根平均直径相比CK降低了29.4%,根长、根表面积、根体积和根尖数分别为CK处理的20.2、21.0、21.3倍和24.5倍;黑麦草地上部分及根系Cd富集量达到CK处理的89.6倍和100.9倍。研究表明,根形态受土壤有效态Cd含量的影响显著,并可通过影响黑麦草生物量及Cd吸收决定其Cd富集量,施用24 g·kg^-1的磷灰石并种植黑麦草能很好地修复Cd污染土壤。
|
| 关 键 词： | Cd 黑麦草 根形态 Cd吸收 磷灰石 石灰 |
| 收稿时间： | 2020/4/3 0:00:00 |
Effects of apatite and lime on root morphology and cadmium uptake by ryegrass under cadmium stress |
| |
| DU Zhi-min,XIANG Ling-yun,DU Kai-min,YANG Wen-ling,WANG Ji-wen,LEI Gao,GUO Xue-bai,GUO Liang,ZHOU Jing,GONG Tao,CHEN Guo-can,ZHEN Jing.Effects of apatite and lime on root morphology and cadmium uptake by ryegrass under cadmium stress[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2021,40(1):92-101. |
| |
| Authors: | DU Zhi-min XIANG Ling-yun DU Kai-min YANG Wen-ling WANG Ji-wen LEI Gao GUO Xue-bai GUO Liang ZHOU Jing GONG Tao CHEN Guo-can ZHEN Jing |
| |
| Institution: | Institute of Biology Co. Ltd., Henan Academy of Sciences, Zhengzhou 450008, China;School of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China;Henan Hechuan Construction Supervision Co., Ltd, Zhengzhou 450000, China;Henan Vocational College of Water Conservancy and Environment, Zhengzhou 450008, China;Institute of Soil Science, Chinese Academy Sciences, Nanjing 210008, China |
| |
| Abstract: | A pot experiment was conducted to test the remediation effects in Cd contaminated soil by applying apatite(CK, L1, L2, and L3 at dosages of 0, 6, 12, and 24 g·kg-1, respectively)and lime(S1, S2, and S3 at dosages of 1, 2, and 4 g·kg-1, respectively). The biomass,root morphology, Cd concentration and accumulation, bioaccumulation factors, soil pH, and available Cd content in soil were measured. The results showed that apatite and lime(except L1 and S1)significantly increased soil pH, biomass, and root length, surface area, volume, tips number, and Cd accumulation in ryegrass, but significantly decreased Cd concentration, bioaccumulation factors, average root diameter, and soil Cd availability. Correlation analysis showed that the root length, surface area, volume, and tips number(root average diameter), had significant negative(posivive) linear correlations with the available Cd content in soil, Cd concentration, and bioaccumulation factors in ryegrass, while these had significant positive(negative)linear correlations with aboveground and root biomass and Cd accumulation in ryegrass. Compared to controls, L3 increased the aboveground and root biomass of ryegrass by 176.0 and 174.4 times; decreased the average root diameter by 29.4%; increased the root length, surface area, volume, and tips number by 20.2, 21.0, 21.3, and 24.5 times, respectively; and increased Cd accumulation in the aboveground parts and the root by 89.6 and 100.9 times, respectively. In general, root morphology could significantly be affected by the availability of Cd in soil, which in turn affects the biomass and uptake of Cd, and also determines the Cd accumulation in ryegrass. Thus, combining apatite at a dosage of 24 g·kg-1 with ryegrass could effectively remediate Cd-contaminated soil. |
| |
| Keywords: | Cd ryegrass root morphology Cd uptake apatite lime |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《农业环境科学学报》浏览原始摘要信息 |
| 点击此处可从《农业环境科学学报》下载免费的PDF全文 |
|
