祁连山林区土壤水分条件的分析与评价  

Analysis and Evaluation on the Condition of Soil Water of Forest Area in Qilian Mountains

作　　者：张学龙[1] 王金叶[1] 常宗强[1] 金铭[1] 杨秋香[1] 

机构地区：[1]甘肃省张掖祁连山水源林研究所,甘肃张掖734000

出　　处：《西北林学院学报》2001年第z1期17-21,共5页Journal of Northwest Forestry University

基　　金：国家林业局"中国森林生态系统研究网络"项目 ( 96 -30 )

摘　　要：通过对祁连山林区云杉林、圆柏林、灌丛林和牧草地等 4种主要植被类型土壤水分动态进行长期定位研究 ,揭示出生长季节内各植被类型的土壤水分动态变化规律。从土壤水分的变化特征 ,土壤水分有效性等几个方面对祁连山林区主要植被类型的土壤水分条件进行了分析与评价 ,表明祁连山林区主要植被类型的土壤水分垂直变化可分为 :土壤水分弱利用层、土壤水分利用层、土壤水分调节层 ;林地土壤水分的季节变化可分为 :土壤水分消耗期、土壤水分补偿期、土壤水分消退期、土壤水分稳定期 4个时期。根据土壤水分对植物的有效性 ,将土壤水分划分为易效水、中效水和难效水三种状态 ,评价土壤水分有效性认为云杉林水分供应状况最好。By long located experiment on soil moisture content dynamics of the four main vegetation types, i.e.,Picea crossifolia,Sabina przewalskii,grazing land,soil water dynamics was revealed. Transformation feature and availability of soil moisture content for main vegetation type were studied and evaluated. The results indicated that vertical transformations of soil moisture content in the type are weak utilization layer, utilization layer and adjust layer of soil moisture content. And seasonal transformations of soil moisture content in forestland are consumption,compensation,losing and stability periods of soil moisture content. In accordance with availability for plants of soil moisture content,it has classfied soil moisture content into three habitus: easy available water,semi-available water and difficult available water. And takes Picea crossifolia the best soil moisture content condition.

关 键 词：祁连山 水源涵养林 土壤水分变化 土壤水分有效性 

分 类 号：S714[农业科学—林学]