江西省土壤可溶态稀土元素含量和分布规律的研究  

Study on Content and Distribution Pattern ofSoluble Rare Earth Elements in Jiangxi Province

作　　者：陶其骧 魏向文 

机构地区：[1]江西省农科院土壤肥料研究所

出　　处：《江西农业学报》1998年第2期15-22,共8页Acta Agriculturae Jiangxi

摘　　要：对江西１１种母质发育有代表性的水稻土、旱土、自然土壤，６１个剖面，４１２个土样的可溶态稀土元素分析测定，统计结果表明：江西土壤稀土元素的强度因素处于较高水平，平均值为１９．０ｍｇ／ｋｇ，有４２．８０％的样点处于丰富级；有由南向北，由东向西逐渐降低的趋势。其含量最高的地区是赣南由花岗岩、泥质岩、第四纪红粘土、酸性紫色土、炭质岩类风化物等母质发育的土壤，较低的为赣西北由石英岩，第三纪红砂岩、石灰岩、下蜀系黄土等母质发育的土壤；在土壤剖面分布中，旱地表层低于底层，水稻土表层有生物富集作用高于底层；影响土壤中可溶态稀土元素含量的主要因子有：成土母质，气候条件（温度，降水量），土壤ｐＨ，土壤质地。The soluble rate earth elements content of 412 soil samples, including those taken from 61 profiles, were determined. These samples were taken from typical paddy soils, drylands and natural soils which were developed from eleven types of soil-forming parent materials in Jiangxi Province. The statistical results demonstrated that the content of rare earth elements in soils in Jiangxi Province averaged 19.0 mg/kg, being in a relatively high level, and 42.8% of them belonging the grade of abundance. There existed a progressively decrease trend both from south to north and from east to west. The soils in southern parts of Jiangxi, which included those developed from the parent materials of granite, pelite, quaterary period red clay soil , acid purple soil and weathering material of carbonaceous rock, contained the highest level of rare earth elements, while the soils in northeastern parts of Jiangxi, which included those developed from quartzite, tertiary period red sandstone, calcareous rock and subordinate system yellow soil,had lower level of content. As to the distri bution pattern of rare earth elements in soil profile, the content in top soil was lower than that in bottom in drylands, and that in top soil in paddy soils, which had the action of biological concentration, was higher than that in bottom. The major factors which influenced the contents of soluble rare earth clements in soil included types of soil forming parent materials, climate conditions, such as air temperature and rainfall, soil pH and soil texture.

关 键 词：可溶态稀土 土壤 分布规律 稀土元素含量 

分 类 号：S153.61[农业科学—土壤学] S151.93[农业科学—农业基础科学]