摘要
对我国南方3个典型岩溶石山区岩石、土壤和牧草中14种矿质元素的分布、迁移和富集特征进行了研究。结果表明,岩溶山区土壤与成土母岩矿质元素含量的多少顺序具有相似性,Al、Fe、Ca、Mg、K含量普遍较高,而Pb、Cu、Mo、Cd含量较低。岩溶山区在成土过程中,Fe、Al、Mn、K元素富集而其他元素相对淋失,矿质元素在土壤各层位的富集表现为A>B>C。Ca、Mg、K等元素主要富集在牧草的叶片中,而Fe、Al、Mn元素主要富集在牧草的根部。牧草根部与土壤之间相同元素的相关性最大,其次是茎部,叶片部分与土壤各层位矿质元素的相关性最差,岩石、土壤、牧草之间矿质元素相关性具有非共轭关系,在土壤中含量较高的元素,其与牧草体内矿质元素的相关性不一定高,而牧草体内相对富集的矿质元素,如Ca、Mg、K元素与土壤中的矿质元素也未表现出显著的相关性。
The contents of 14 mineral elements in samples taken from the rock-soil-forage grass system（R-S-F） in karst mountainous area in south China were tested for analysis of their distribution,migration and accumulation.Results showed that the gradation of element contents in the rock was parallel to that in the soil,which presented high content of Al,Fe,Ca,Mg,K and low content of Pb,Cu,Mo,Cd.In the process of forming soil,Fe,Al,Mn and K were accumulated,while the other elements were eluviated and lost.The enrich order of all tested elements in the soil layers were ABC.Ca,Mg and K were mainly accumulated in the leaves,while Fe,Al and Mn were mainly accumulated in the roots.The correlation of element contents between the roots of grasses and every layer in the soil was biggest,followed by stems and leaves.The correlation of element contents among rock,soil and forage grasses showed unconjugated.Mineral elements that had higher contents in the soil did not always show higher correlation with those in the grasses.The elements accumulated in the grasses such as Ca,Mg and K did not present significant correlation with those in the soil.
出处
《河南农业科学》
CSCD
北大核心
2011年第7期67-72,共6页
Journal of Henan Agricultural Sciences
基金
国家"十一五"科技支撑计划项目(2006BAC01A10)
中国地质调查局地质调查项目(水[2010]矿评03-07-03)
中国地质科学院岩溶地质研究所基本科研业务费项目(2010003
200709
2008008)
关键词
岩溶山区
岩石
土壤
牧草
分布
迁移
富集
矿质元素
Karst mountainous areas
Rock
Soil
Forage grass
Distribution
Migration
Accumulation
Mineral element
