南方林区微量元素在母岩——土壤——森林系统中的分布  

DISTRIBUTION OF MICRONUTRIENTS IN PARENT ROCK—? OIL——FOREST SYSTEM IN THE SOUTHERN FORESTRY AREAS OF CHINA

作　　者：张焕朝[1] 徐宏强[1] 俞元春 罗汝英 

机构地区：[1]南京林业大学森林资源与环境学院

出　　处：《南京林业大学学报（自然科学版）》1997年第4期93-98,共6页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家自然科学基金

摘　　要：调查分析了我国南方亚热带林区不同母岩、不同林分下１４个样地的土壤和林木当年生叶及林地枯落物的微量元素状况，探讨了微量元素（硼、钼、铜、锌、铁、锰）的地球化学特性，及其在母岩———土壤———森林系统中的分布规律。结果表明，土壤微量元素全量大小主要取决于母岩类型、风化和土壤形成特点等因子。除岩性外，林分类型（杉木、火炬松和麻栎）对微量元素有效量的影响也是非常明显的。林地土壤中钼、铜、锌和锰４种元素的全量与有效量之间存在着明显的相关关系；而铁的全量和有效量之间无明显的线性或非线性关系；各林地土壤中硼的有效量均保持在０３０ｍｇ·ｋｇ－１左右，与其全量多少无关。不同母岩不但影响土壤中各微量元素的含量，而且也影响到相应林分枯落物层中的微量元素状况。The micronutrients(B,Mo,Cu,Zn,Fe and Mn)in soils,the tree foliage of the current year and the litter from 14 plots were analysed to study their geochemistry's traits and distribution in the Parent rock-Soil-Forest system in the southern forestry areas of China.The plots were selected on the basis of different parent rocks and different stands.The results showed that the total contents of various micronutrients in soils were mainly affected by the types of parent rocks,the traits of weathering and soil formation, and their available concentrations were obviously influenced by the types of stand,besides the parent rocks.There were notable linear correlations between the total content of Mo,Cu,Zn,Mn in soils and their available concentration,respectively; but the same correlation or other non-linear correlations did not occur in Fe. The available concentrations of B in soils of those plots stayed around 0 30mg·kg -1 ,no matter how much their total contents were.The effects of parent rocks on the contents of various micronutrients,took place not only in soils but also in litters of the corresponding stands.

关 键 词：微量元素 母岩 森林土壤 森林系统 

分 类 号：S718[农业科学—林学]