摘要
本文研究了不同稀土元素在不同浓度水平下红壤（黄筋泥）中微生物量的变化规律。结果表明，不同稀土元素对土壤微生物量具有相似的影响效应：在低稀土浓度条件下土壤微生物量升高，随稀土浓度的升高土壤微生物量显著降低。但不同稀土元素使微生物量降低的程度各异，并初步求得黄筋泥中稀土元素对微生物的毒性浓度可能在（90～180）×10(－6)范围内。
Changes in red soil microbial biomass under different REE concentrations have been studied. Theresults show that there exist similar effects of the REE on red soil microbial biomass: soil microbialbiomass increases at lower REE concentrations, but decreases rapidly with increasing REE concentra-tions. However, this trend of decreasing depends on different REE. It could be concluded that thetoxic concentrations of REE toward red soil microbe may be within the range of (90 - 180) ×10-6.
出处
《地质地球化学》
CAS
CSCD
北大核心
1999年第1期108-112,共5页
Geology-Geochemistry
关键词
微生物量
稀土族
红壤
土壤
rare-earth elements
soil microbial biomass
