干旱区生态环境知识资源中心(Arid): 干旱区绿洲土壤中胡萝卜对Pb

Arid

	干旱区绿洲土壤中胡萝卜对Pb - Zn污染的响应及重金属累积特征
其他题名	Lead and zinc migration characteristics in the farmland soil - carrot system under Pb - Zn stress in arid areasoases soil
	庞瑜; 赵转军; 南忠仁; 王兆炜
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2017
卷号	31 期号:6 页码:166-172
中文摘要	以干旱绿洲土壤为研究对象,采用盆栽实验探究外源Pb - Zn复合胁迫下,重金属对胡萝卜生长形态的影响及两种元素在研究区土壤-胡萝卜中的迁移转化特征。结果表明:随着胁迫浓度的增大,胡萝卜叶长随之降低,根长变化不明显,干重变化呈"低促高抑"态势。从两种重金属的积累特征看:胡萝卜对Pb、Zn的富集系数( BCF)均小于1,迁移系数( TF)均大于1,即两种重金属在整个迁移系统中的运移界面主要位于根-叶之间,且根-叶间迁移能力大小为: Zn > Pb。通过对比分析发现两种元素交互作用为: Pb对于Zn的富集和迁移均产生拮抗作用; Zn的共存对Pb的迁移是协同作用,但对其富集作用的影响表现为:低浓度拮抗,高浓度协同。
英文摘要	Pot experiment were conducted on carrot grown in oasis soil under combined stress of lead and zinc,to study the effect of heavy metal combined pollution on carrot growth as well as the enrichment and migration of heavy metals in carrot. The result showed that the concentrations of the heavy metals in carrot are positively correlated with the concentrations of the two kinds of the heavy metals in soil. The promoting effect on the carrot dry biomass was shown in the low concentration treatments,and the carrot rootsdry biomass varied from - 11. 97% to 173. 26%,leaves dry biomass varied from - 22. 9% to 82. 49%. At the same time,both of the two kinds of metalsBCF values never exceeded one. But the TF values were never below one. The main migration between the roots and leaves showed Lead was more inactive than zinc in general. While the two kind of heavy metals apply to the carrot simultaneously,lead decreased zincs BCF values and TF values,but zinc increased the TF values of the lead. And TF values of lead were increased while under low zinc concentration,but under high concentration of zinc it showed opposite trend.
中文关键词	重金属 ; 复合污染 ; 迁移转化 ; 绿洲土壤
英文关键词	Pb Zn lead zinc compound pollution wigration characteristics soil oases in arid areas
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:6000021
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/2XILL650/236064
作者单位	兰州大学资源环境学院, 甘肃省环境污染预警与控制重点实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	庞瑜,赵转军,南忠仁,等. 干旱区绿洲土壤中胡萝卜对Pb - Zn污染的响应及重金属累积特征[J]. 兰州大学,2017,31(6):166-172.
APA	庞瑜,赵转军,南忠仁,&王兆炜.(2017).干旱区绿洲土壤中胡萝卜对Pb - Zn污染的响应及重金属累积特征.干旱区资源与环境,31(6),166-172.
MLA	庞瑜,et al."干旱区绿洲土壤中胡萝卜对Pb - Zn污染的响应及重金属累积特征".干旱区资源与环境 31.6(2017):166-172.