间作调控植物镉吸收的效应及机制研究进展

Research Progress on Effects and Mechanisms of Intercropping Regulating Cadmium Uptake in Plants

镉是中国粮食主产区耕地重金属污染中占比第一的污染物,对农业生态系统和人类健康构成了潜在威胁。针对我国耕地资源紧缺的基本国情,间作已成为一种新的镉污染土壤高效安全利用策略。综述了间作对植物镉吸收的影响,从植物抗氧化体系、土壤化学特征、土壤微生物和根系分泌物4个方面论述了间作对植物镉吸收的调控机制,提出农作物间作模式在大田的实际应用、农作物间作模式对镉污染土壤的影响及机理、作物纤维废弃物的无害化处理和资源化利用将是今后进一步研究需要解决的问题。

In cultivated soils of major grain-producing areas of China,the exceedance percentage of heavy metals is 21.49%,and mild pollution is up to 13.97%.Cadmium is the first pollutant,which poses a severely potential threat to food security,agricultural ecosystem and human health.In view of the shortage of cultivated land resources in China,intercropping has become a new strategy for efficient and safe utilization of cadmium-contaminated soils.In this paper,the effects of intercropping on cadmium uptake by plants were reviewed.The regulation mechanism of intercropping on cadmium uptake by plants was discussed from four aspects of plant antioxidant system,soil chemical characteristics,soil microorganism and root exudates.The researches about the practical application of crop intercropping patterns in fields,the influence and mechanism of crop intercropping patterns on cadmium-contaminated soil,and the harmless treatment and resource utilization of crop fiber waste will be highlights in the future.