干旱区生态环境知识资源中心(Arid): 西北干旱区污染绿洲土壤中镉、锌在芹菜中的积累与迁移

Arid

	西北干旱区污染绿洲土壤中镉、锌在芹菜中的积累与迁移
其他题名	Accumulation and migration of Cd and Zn in the celery planted in contaminated arid oasis soil, northwest of China
	杨一鸣; 南忠仁; 赵转军; 王兆炜; 赵翠翠; 晋王强
来源期刊	陕西师范大学学报. 自然科学版
ISSN	1672-4291
出版年	2010
卷号	38 期号:2 页码:89-94
中文摘要	利用盆栽试验,采用Tessier五步连续提取法研究了干旱区污染绿洲土壤中重金属镉、锌在芹菜中的积累与迁移.结果表明:(1)原状绿洲土中Cd、Zn形态以残渣态为主,随着外源性Cd、Zn添加量的增加,芹菜土壤中Cd、Zn全量和各化学形态含量随之增加;且交换态Cd、Zn和碳酸盐结合态Cd、Zn含量增幅较大,有机结合态Cd、Zn含量增幅较小,残渣态Cd、Zn含量几乎不变;随着Cd、Zn添加量的增加,碳酸盐结合态和铁锰氧化物结合态Cd、Zn逐渐占绝对优势.(2)随着外源性Cd、Zn添加浓度的增加,芹菜叶和根部累积的Cd、Zn含量随之增加;土壤中的有机物结合态Cd与芹菜叶和根部累积的Cd含量呈极显著相关,表明土壤中的有机物结合态Cd对芹菜叶和根部累积Cd有最大贡献;有机物结合态Zn与芹菜根部累积的Zn含量,碳酸盐结合态Zn与芹菜叶部累积的Zn含量呈极显著相关,表明有机物结合态Zn和碳酸盐结合态Zn分别对芹菜根和叶部累积Zn有最大贡献.(3)芹菜叶和根部Cd的富集系数均大于1,且Cd的富集系数大于Zn,表明芹菜吸收Cd的能力大于Zn,其毒害作用也相应大于Zn;两种重金属的富集系数根部均大于叶部,且其迁移系数均小于1,表明Cd、Zn在芹菜中的迁移能力较弱,两种金属在芹菜可食用的叶部累积量较少.
英文摘要	Pot experiment was conducted and Tessier’s five-step sequential extraction procedure was used to study the accumulation and migration of cadmium (Cd) and zinc (Zn) in the celery planted in the contaminated arid oasis soil in northwest of China. The results showed that Cd and Zn fractionations in the uncontaminated oasis soil existed almost in the residual fractionation, with Cd and Zn concentrations added increased Cd and Zn contents of the total amount and all fractionations also increased in the soil, moreover, Cd and Zn contents of the exchangeable fractionation (F1)and the carbonate-bound fractionation (F2) increased significantly, and those of the organic-bound fractionation (F3) increased slightly, those of the residual fractionation (F5) was almost unchanged; and with Cd and Zn concentrations added increased, the Cd and Zn contents of the carbonate-bound fractionation (F2) and the Fe-Mn oxide-bound fractionation (F3) gradually occupied the absolute superiority. With Cd and Zn concentrations added increased, Cd and Zn contents in celery roots and leaves increased correspondingly. And doing correlation analysis found that there was significant correlation between the content of the organic-bound fractionation Cd in the soil and Cd contents in the leaves and the roots, which showed that the organic-bound fractionation Cd had the greatest contribution to Cd on the accumulation in the celery leaves and roots. Similarly, there was significant correlation between the contents of the organic-bound fractionation Zn and the carbonate-bound fractionation Zn in the soil and the contents in the celery roots and leaves, respectively, which suggested that the organic-bound fractionation Zn and the carbonate-bound fractionation Zn had the greatest contribution to Zn on the accumulation in celery roots and leaves, respectively. The Bio-concentration Factors (BCF) in the celery leaves and roots were all greater than 1, moreover the BCF of Cd was greater than Zn, and, the BCF of the two metals in the roots were greater than leaves, which showed that uptake capacity to Cd was greater than Zn for the celery, and the toxicity of Cd is also greater than the corresponding Zn for the celery. However, the bio-translocation factors (BTF) of the two metals were all lower than 1, indicating that the migration capacity of Cd and Zn in the celery was weaker, and the two metals in the edible leaves of the celery had less accumulation.
中文关键词	绿洲土壤 ; 污染 ; 化学形态 ; 积累与迁移
英文关键词	oasis soil contamination chemical fractionation accumulation and migration
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY ; ENVIRONMENTAL SCIENCES
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
CSCD记录号	CSCD:3837781
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225463
作者单位	兰州大学,资源环境学院, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	杨一鸣,南忠仁,赵转军,等. 西北干旱区污染绿洲土壤中镉、锌在芹菜中的积累与迁移[J]. 兰州大学,2010,38(2):89-94.
APA	杨一鸣,南忠仁,赵转军,王兆炜,赵翠翠,&晋王强.(2010).西北干旱区污染绿洲土壤中镉、锌在芹菜中的积累与迁移.陕西师范大学学报. 自然科学版,38(2),89-94.
MLA	杨一鸣,et al."西北干旱区污染绿洲土壤中镉、锌在芹菜中的积累与迁移".陕西师范大学学报. 自然科学版 38.2(2010):89-94.