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测定了具有代表性的4种母质发育、3种水育型的红壤性水稻土及起源土壤的可溶性稀土(REEs)和稀土总丰度(∑REE),分析了REEs的分布特征及与∑REE的相关,研究了经酸碱调节后土壤REEs与pH值的关系,结果表明:(1)不同母质发育的供试土壤REEs平均值依石英闪长岩母质土壤系列、凝灰岩母质土壤系列、黑云母花岗岩母质土壤系列、玄武岩母质土壤系列顺序递减。(2)供试土壤REEs与∑REE的相关不显著。(3)起源土壤剖面中REEs具有明显自上而下增大的趋势,而不同水育型水稻土剖面的REEs分布各有特征,但总的趋势是自上而下减少。(4)经酸度调节后供试土壤的REEs随着土壤pH值的提高而下降,呈显著的幂函数相关。
The REEs and the total rare earth elements (REEs) of four typical fertile paddy soils and three aquiculture paddy soils and their origin soils were determined. The distribution characteristics of REEs and their relationship with ΣREE The results showed that: (1) The average values of REEs in soils with different parent materials were in accordance with the parent series of quartz diorite, the tuff parent soil series, the biotite Granite parent soil series, Basalt parent soil series decreasing order. (2) The correlation between soil REEs and ΣREE was not significant. (3) The REEs in the originated soil profiles tend to increase obviously from top to bottom. However, the distributions of REEs in different paddy soil profiles have their own characteristics. However, the general trend is that REEs decrease from top to bottom. (4) The REEs of soils tested after acidity adjustment decreased with the increase of soil pH, showing a significant power function correlation.