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当前位置: 首页 > 文章 > 作物对土壤中环境激素铅的吸收效应及污染防治 农业环境科学学报 2002,21 (06) 2-5
Position: Home > Articles > Phytoavailability of Crops to Environmental Hormone Pb in Soils and Its Remediation Journal of Agro-Environment Science 2002,21 (06) 2-5

作物对土壤中环境激素铅的吸收效应及污染防治

作  者：
匡少平;张书圣
单  位：
青岛科技大学应用化学系
关键词：
环境激素;重金属污染;铅(Pb);土壤;植物效应;环境修复
摘  要：
采用盆栽试验方法,研究了水稻、玉米等作物对土壤中环境激素铅的吸收效应及污染防治方法。试验结果表明,当土壤中加入不同比例的铅时(0—4000mg·kg-1),基本没有观察到铅对水稻、玉米的毒害病症,铅对作物的生长发育没有明显的宏观影响。但微区调查揭示,水稻和玉米对土壤中的铅具有强烈的吸收性,并可残留在作物的各个部位,且吸收量随土壤中铅添加量的增加而提高;其中根系的吸收性最强,是秸秆、籽实的几十至几千倍,表明作物根系为秸秆、籽实对铅的吸收提供了良好的屏障。运用根系对土壤中铅的特殊吸收性,可以在铅污染的土壤区通过自然作物栽培,并将作物根系从土壤中清除的方法,来逐渐达到环境土壤修复的目的。
译  名：
Phytoavailability of Crops to Environmental Hormone Pb in Soils and Its Remediation
作  者：
KUANG Shao ping, ZHANG Shu sheng(Department of Applied Chemistry, Qingdao University of Science and Technology, Qingdao 266042, China)
关键词：
environmental hormone; heavy metal pollution; lead (Pb); soil; crop growing effect; environmental remediation.
摘  要：
Lead (Pb) as an environment hormone, acts as estrogens in animal and human bodies, and its pollution in environments can result in many procreant anomalies, such as maladjustment of incretion, weaken of procreation function and descend of genital immunity. Potted plant tests of paddies and corns indicated that these crops did not show the macro-toxic symptoms in the observed Pb-added contents (0—4 000 mg·kg-1) to soils. However, lead in soils was easily absorbed by crops and left in different parts of plants. Statistical analyses showed that Pb contents in the crops were strongly positive correlated to the contents in the soils. In crops, Pb contents in roots were the highest, tens to thousands times higher than those of straw and seeds. It may be suggested that roots was a barrier for Pb absorption of straw and seeds. Based on this fact, Pb polluted soil can be gradually decreased by planting crops and subsequently removing the roots from the soil. This biotechnology may be used in environmental remediation, which embraces the duality of a sustainable agricultural economy and a healthy environment.

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