PHYTOAVAILABILITY OF CORNS TO HEAVY METAL Pb CONTENT IN THE SOILS AND ITS BENEFIT TO THE ENVIRONMENTAL AMELIORATION

作者：Xu Zhong · 发表于：Applied Mechanics and Materials · 年份：2002 · 被引用次数：2 · 研究领域：Magnetic and Electromagnetic Effects、Crop Yield and Soil Fertility

The present paper is aimed at testing and investigating the pot-growing corns to find the influence of some heavy metal content on the soil. The author's investigation indicates that such crops did not show any macro-toxic signs in the presence of some observed Pb-added content (0~4 000 mg/kg) to the soil. On the contrary, lead in the soil can easily be absorbed by the crops and spread over in their different parts. Statistical analyses prove that the Pb content of the crops is strongly positive to their counterparts of the soil. In crops, the Pb content in the roots can be the highest, from tens to thousands of times higher than that in the stems, leaves and seeds. Thus it can be suggested that the roots might be the barriers to the Pb absorption by the stems, leaves as well as the seeds. Based on the root's strong adsorption to lead, the Pb in heavy metal polluted soil can be gradually decreased by planting crops and subsequently removing the roots in soil. This biotechnology can be used in environmental amelioration and remediation to benefit both a sustainable agricultural economy and a healthy, environment-friendly ecological system.