镧在草-菇-土系统中的循环与生物富集效应

利用稀土镧肥种植牧草南非马唐，采用含镧牧草栽培杏鲍菇和以菇渣作为有机肥种植牧草进行连续性试验，研究镧在草-菇-土系统中的分配与生物富集情况。结果表明：施镧处理的南非马唐和杏鲍菇各器官的镧元素含量均高于不施镧处理，其中镧在牧草南非马唐中的分布为根>叶>茎，镧在杏鲍菇中的分布为菌盖>菌柄；外源镧进入土壤以后，南非马唐不同器官的镧元素生物富集系数均随着镧施入量的增加而增大，其中以根的镧生物富集系数最大，介于0.443—0.580之间。除高剂量（M4）处理外，叶和茎的镧生物富集系数不同处理间无显著差异，但根出现明显变化；含镧牧草栽培杏鲍菇和菇渣种植南非马唐后，不同器官的镧含量无显著增加，说明镧残留在草-菇-土系统中迁移转化效率降低。

Biological cycle and accumulation of lanthanum in the forage-mushroom-soil system

Rare earth elements(REE) and their compounds have been widely applied in agronomic and medical fields for many years.The bioinorganic chemical research of REE in the past few years indicates that REE play important roles in the promotion of photosynthesis,root absorption,and regulation of hormone and nitrogen metabolism.There was an increasing interest in the bioaccumulation processes of rare earth elements(REEs) due to the wide application of REEs in a variety of non-nuclear industries and agriculture,resu...