黄土中Cu、Cd在小麦中的累积和对生长影响

摘要

We studied the effects on wheat growth and accumulation of exogenous Cu( Ⅱ )、Cd( Ⅱ )in alkaline loess which was in different levels by pots experiment. Results showed that the vigorous of grown would take advantage of the migration and accumulation of heavy metals in wheat, The high metabolism plant organs accumulated lots of heavy metals, such as roots and leaves. But the nutrient storage organ had much less. The cadmium promoted the absorption of copper and the copper inhibited the absorption of cadmium in wheat when combined pollution of Cu and Cd, Combined with wastewater irrigation, tilling heavy metals in the soil had more effect on the growth of wheat.%通过实验室盆栽试验,研究不同水平外源Cu(Ⅱ)、Cd(Ⅱ)进入碱性黄土土壤中对小麦生长的影响和累积情况.结果表明,小麦的生长活动越旺盛,越有利于植株内重金属的迁移和富集.重金属在植物体内新陈代谢旺盛的器官中蓄积量较大,如根和叶,而营养储存器官穗中积量较少.Cu和Cd复合污染时,镉促进小麦植株对铜的吸收,而铜抑制镉的吸收.重金属的翻土拌入比污水灌溉对小麦的生长影响大.