浙闽毛竹林土壤有效硅含量与地理分布  

Geographic Distribution and Content of Available Silicon in Soils under Ph. pubescens Stands in Zhejiang and Fujian Province

作　　者：胡炳堂[1] 王舟莲[1] 洪顺山[1] 

机构地区：[1]中国林业科学研究院亚热带林业研究所

出　　处：《林业科学研究》1994年第4期364-370,共7页Forest Research

基　　金：中国林业科学研究院科技发展基金

摘　　要：采用典型调查的方法，观察了浙江和福建主要毛竹产区林下土壤的１７２个剖面，采集各类土样６３３个进行有效硅含量的测试，结果表明：①有效硅含量因土壤母质、土壤类型以及所在地理位置（纬度、海拔等）的不同而各有差异。一般火成岩（本调查中花岗岩类和高海拔区凝灰岩除外）发育的土壤有效硅含量较低，沉积岩较高，变质岩尚无规律。各类土壤有效硅含量顺序为：山地黄壤＞石灰性土＞山地黄棕壤＞山地红壤≥黄红壤＞酸性紫色土≥低丘红壤。相同成土母质上发育的土壤，其有效硅含量呈现从南到北（纬度）、由低到高（海拔）递增甚至骤增趋势。②该区土壤有效硅含量平均为：Ａ层４５．１３ｍｇ／ｋｇ、Ｂ层７６．５６ｍｇ／ｋｇ，且变异幅度极大。结合主产竹县有效硅聚类分析结果，绘制出两省毛竹林土壤有效硅低值含量分布图。Conducting the method of typical investigation to collect 172 profiles of thesoil in the main Ph.pubescens stands in Zhejing and Fujian Province,633 samples of soil havebeen tested to analyse the available Si content.As a result,1.Contents of available Si in dif-ferent soils vary because different kinds of rock,types of soil,geography(different of lati-tudes,or altitudes etc.).The soil available Si content is quite low in general igneous rock ex-cept for granite and tuff of higher elevation in this investigations,and is comparatively high insedimentary rock.But in metamorphic rocks it appearss in random. The order of the avail-able Si content in each kind of soil in order is:mountain yellow earth > calcareous soil >mountain yellow-brown earth >mountain red earth≥yellow-red earth >acid purple soil≥low hill red earth. It indicated that the distribution of the soil available Si has a rising latitu-dinal zonality law of from the south to the north and a rising vertical zonality law of the alti-tudes from the bottom to the top.2.Average of soil available Si content in that area are :45.13 mg/kg(A horizon),76.56 mg/kg(B horizon),and its degree of variation Was thelargest.A distribution map of low available Si content regions in that area has been madebased on the cluster analysis

关 键 词：毛竹 有效硅 土壤 地理分布 

分 类 号：S795.720.3[农业科学—林木遗传育种]