土壤污染对植物根系生长影响的研究进展

人类活动所产生的污染物通过各种途径进入土壤,其数量和速度超过了土壤的容纳和净化能力,致使土壤的自然功能失调、土壤质量恶化,从而严重影响植物的正常生长发育,造成有害物质在植物体内累积。土壤污染物进入植物体内最先进入根系,污染物在根系积累最大,浓度最高,根部受害最严重。本文以重金属砷、镉、铬和有机物农药、除草剂为例,结合相关资料探讨了土壤污染对植物根系生长的影响,植物根系对重金属的吸收与重金属的理化性质及不同植物的特性有关,对有机物的吸收与有机物的结构特性和土壤性质有关,并且讨论了该研究仍需解决的一些问题。

Advances in the Reseach of the Impact of Soil Pollution on the Growth of Plant Roots

Pollutants from human activity going into soil by various ways have been over the soil＇s capacity and purifying function by, the quantity and speed, which cause soil natural malfunction and degradation, further more affect plants＇ normal growth by accumulating harmful substance within plants. Plant roots as an entrance for pollutants, have accumulated much more pollutants and therefore are damaged most. Illustrating with arsenic, cadmium, chromium, pesticide and herbicide, this paper investigates the impact of soil pollution on the growth of plant roots in accordance with the related information, and explains that the absorption of heavy metal by plant roots is related with its characteristics and heavy metal physicochemical properties, the absorption of organic compound is related with soil characteristics and organic compound structural properties. The problems to be solved are also discussed.