[1]石含之,吴志超,王旭,等.土壤外源镉老化过程中形态变化及影响因素[J].江苏农业学报,2019,(06):1360-1367.[doi:doi:10.3969/j.issn.1000-4440.2019.06.013]
　SHI Han-zhi,WU Zhi-chao,WANG Xu,et al.Changes of chemical forms and influencing factors of soil exogenous cadmium during the aging process[J].,2019,(06):1360-1367.[doi:doi:10.3969/j.issn.1000-4440.2019.06.013]
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土壤外源镉老化过程中形态变化及影响因素()
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江苏农业学报[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2019年06期
页码:
1360-1367
栏目:
耕作栽培·资源环境
出版日期:
2019-12-31

文章信息/Info

Title:
Changes of chemical forms and influencing factors of soil exogenous cadmium during the aging process
作者:
石含之1; 2; 吴志超1; 2; 王旭1; 2; 杜瑞英1; 2
（1.广东省农业科学院农产品公共监测中心，广东广州510640；2.农业农村部农产品质量安全检测与评价重点实验室，广东广州510640）
Author(s):
SHI Han-zhi1; 2;  WU Zhi-chao1; 2;  WANG Xu1; 2;  DU Rui-ying1; 2
(1. Public Monitoring Center for Agro-product, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China; 2. Key Laboratory of Testing and Evaluation for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs of the People′s Republic of China, Guangzhou 510640, China)
关键词:
外源镉; 秸秆; 细菌; 老化
Keywords:
exogenous cadmium; rice straw; bacteria; aging
分类号:
X592
DOI:
doi:10.3969/j.issn.1000-4440.2019.06.013
文献标志码:
A
摘要:
为研究土壤组分相互作用及老化时间对外源镉（Cd）化学形态的影响，向红壤、褐土及黑土中添加秸秆或秸秆+细菌后施入外源Cd，土壤培养360 d，每120 d取样1次，测定土壤中Cd化学形态及不同类型有机碳和铁氧化物含量，利用多元线性逐步回归方法分析影响土壤中Cd老化的因素。结果显示：3种土壤中离子交换态Cd含量均最高，红壤和黑土中离子交换态Cd含量超过总Cd含量的50%；秸秆、秸秆+细菌添加处理降低了褐土中碳酸盐结合态Cd含量，提高了3种土壤中腐殖酸结合态Cd含量；3种土壤中残渣态Cd含量随时间延长逐渐增加，秸秆、秸秆+细菌添加处理促进红壤及黑土中Cd老化的效果更显著。红壤中促进Cd老化的因素为腐殖酸和络合铁，游离铁可促进褐土中Cd的固定，黑土中腐殖酸和非晶型铁对Cd老化起促进作用。
Abstract:
To investigate the effect of soil components interactions and aging on the chemical forms of exogenous cadmium (Cd), Cd solution was introduced to soils (red soil, cinnamon soil and black soil) after rice straw or rice straw+bacteria interacted with soil components. The soil incubation experiment was kept for 360 d, and soil samples were collected every 120 d. Sequential extraction procedures were used to obtain Cd forms, and the contents of organic carbon and iron oxides were determined. Soil factors controlling Cd forms were calculated by stepwise regression analysis. The results showed that the content of exchangeable Cd was highest in the three soils. The proportions of exchangeable Cd were exceeded 50% in red and black soil. The addition of rice straw and rice straw + bacteria reduced the content of carbonate bound Cd in cinnamon soil, and increased the content of humic-substance bound Cd in all the three soils. The contents of residual Cd in all the soils were increased with time. Rice straw and rice straw + bacteria had better aging effect on Cd in red and cinnamon soils. Humic acid and complex iron oxides are the factors that promote Cd aging in red soil. Free iron oxides can accelerate the fixation of Cd in cinnamon soil. Humic acid and amorphous iron oxides are the factors promoting Cd aging in black soil.

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备注/Memo

备注/Memo:
收稿日期：2019-04-17 基金项目：国家重点研发计划项目（2018YFD0800704）；国家青年科学基金项目（4180071811）；广东省自然科学基金项目（2016A030310323）；广东省农业科学院院长基金项目（201728）;广东省农业科学院农产品公共监测中心博士启动项目（ZXRC-201903） 作者简介：石含之（1989-），女，河南安阳人，博士，助理研究员，主要研究方向为土壤重金属污染修复。(E-mail) 692874887@qq.com 通讯作者：杜瑞英，(E-mail) duruiying@163.com
更新日期/Last Update: 2020-01-09