文档介绍：大豆和小麦对土壤中镉的吸收与富集研究
赵鲁1,李旭军2*,刘安辉1,吴文强2,叶琰1,张泽1,刘清扬1,蒋增1,许丽1
(1轻工业环境保护研究所,北京,100089;2北京市土肥工作站,北京,100029)
摘要:在温室条件下,~ mg/kg的土壤中生长状况以及对镉的吸收与富集特征。结果表明,试验所设土壤镉含量对两种作物的株高和单盆籽粒数没有影响。随土壤镉含量的增加,两者单盆产量呈先增加后降低的趋势。~ mg/kg时,~ mg/kg时,更容易积累镉。添加镉能明显增加两种作物植株各部分镉含量。外源添加镉对大豆的转移系数影响不明显,但能增加小麦的转移系数。两种作物的富集系数基本表现为根>茎叶>籽粒。 mg/kg时,,对镉的吸收较强。 mg/kg时,,对镉的吸收较强。小麦根的富集系数均高于大豆,,前者具有更高的镉富集能力。
关键词:大豆小麦镉含量转移系数富集系数
Uptake and Accumulation Characteristics of Cadmium by Soybean and Wheat in Soil
ZHAO Lu1,LI Xu-jun2*,LIU An-hui1,WU Wen-qiang2,Ye Yan1,ZHANG Ze1,LIU Qing-yang1,JIANG Zeng1,Xu Li1
(1 Environmental Protection Institute of Light Industry,Beijing,100089,China; 2 Beijing Soil and Fertilizer Station,Beijing,100029,China)
Abstract: A pot experiment was conducted in a greenhouse, to study the growth condition, uptake and accumulation characteristics of cadmium by soybean and wheat planted in the soil with cadmium concentration of ~ mg/kg. The results showed that no impact of soil cadmium concentration was found on the plant height and grain numbers of two crops. With soil cadmium concentration increasing, the yield per pot of the two crops rose in the soil of low cadmium concentration, and fell in that of high. It was easier to accumulate cadmium for t