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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∑REE、∑LREE和∑HREE ,分析了其分布特点和剖面变异性 ,表明 :(1)红壤性水稻土的∑REE平均水平和离散性均大于全国水稻土平均水平 :(2 )不同母质发育的供试土壤的∑REE和∑LREE的平均水平依玄武岩母质土壤系列 >石英闪长岩母质土壤系列 >黑云母花岗岩母质土壤系列 >凝灰岩母质土壤系列顺序递减 ;(3 )土壤剖面稀土组分体系的变异程度为 :∑LREE >∑HREE >∑REE ;而在不同水育类型上则依起源土壤、潜育型水稻土、渗育型水稻土、潴育型水稻土顺序增大。 (4 )∑LREE和∑HREE在渗育型水稻土的E层和潴育型水稻土的Br层具有显著的分馏作用
The ΣREE, ΣLREE and ΣHREE of three parental types of paddy soils and three types of aquatic red paddy soils and their origin soils were determined. The distribution characteristics and cross-sectional variability were analyzed. The results showed that: (1) The average ΣREE and ΣDREE of the paddy soils are higher than the average level of the paddy soils in China. (2) The average ΣREE and ΣLREE of the tested soils with different parent materials depend on the parent basalt series> quartz diorite parental soil Series> biotite granite parent soil series> tuff parent matrix series decreasing orderly; (3) the degree of variation of rare earth component system in the soil profile is ΣLREE> ΣHREE> ΣREE; and in different types of aquaculture, , Latent soil type, infiltration type paddy soil, retention type paddy soil in order increase. (4) ΣLREE and ΣHREE have significant fractionation in the E layer of infiltration paddy soil and the Br layer of the paddy-paddy paddy soil