[生态环境保护论文]
摘要：分析了黄土剖面中缓效钾的生物-地球化学特征，认为黄土-古土壤序列中缓效钾的形成既受到地质大循环的控制，又受到了地区生物小循环的影响作用；通过对磁化率与缓效钾的含量进行相关分析，结果表明缓效钾的形成与东亚古夏季风变化有密切关系，比传统的替代性指标磁化率更能反映古气候环境变化过程中次一级的气候波动事件，是一种新的反映东亚夏季风变化的替代性指标。
关键词：缓效钾；磁化率；夏季风变化；古气候环境
1672-1683（2010）06-0018-03
Characteristics of Slowly Available K Biogeochemistry in the Loess Section and its Paleoclimatic Environment Significance
WU Li-jie,SHI Jian-sheng,YE Hao,BI Zhi-wEi,SUN Yan-min,GUO Jiao,DONG Qiu-yao
(The Institute of Hydrogeology and Environmental Geology,CAGS,Shijiazhuang 050061,China)
Abstract:This paper by analyzing characteristics of slowly available K biogeochemistry in the loess section,considers that the formation of slowly available K in the loess-paleosol sequence is not only controlled by geological cycle,but affected by biological cycle.The correlation of both susceptibility and the content of slowly available K indicate that the formation of slowly available K in the loess is affinitive to the change of the East Asian summer monsoon.Contrasting with traditional substitute index(as soil susceptibility),slowly available K,which could be able to reflect the more minute fluctuation affair of the paleoclimate,is a new substitute index reflecting the change of the East Asian ……
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