红壤性水稻土可溶态稀土分布特征及与酸度调控的关系  

Study on the Distribution and Variability of Soluble Rare Earth Element in Paddy Soils Derived from Red Earth

作　　者：唐南奇[1] 

机构地区：[1]福建农林大学资源与环境学院,福建福州350002

出　　处：《土壤通报》2003年第3期212-215,共4页Chinese Journal of Soil Science

摘　　要：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 ∑REE in three different hydromorphic paddy soils and their original soils derived from four parent materials were determined,and their REEs distribution characteristic, the correlation between REEs and ∑REE, and the correlation between REEs and pH values were analyzed.(1) The average values of REEs in the tested soils derived from different parent materials decreased in the order of quartz diorite parent soil system,tuff parent soil system,biotite granite parent soil system basalt parent soil system.(2)The correlation between REEs and ∑REE in the tested soils was insignificant (3) There was an increasing tendency of REEs in the original soil profiles from top to bottom horizons, however, there are different variance tendencies of REEs in the different hydromorphic paddy soil profiles.The total variance tendency of REEs in the paddy soil profiles decreased from top to bottom horizons. (4) REEs in the tested soils declineds soil pH values rose,and the correlation of the power functions between REES and pH values in the tested soils were significant.

关 键 词：红壤性水稻土 可溶态稀土 分布特征 酸度调控 

分 类 号：S153[农业科学—土壤学]