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生态学杂志 ›› 2012, Vol. 31 ›› Issue (02): 319-323.

• 研究报告 • 上一篇    下一篇

不同空间尺度土壤水分与环境因素的关系

王信增1,焦峰1,2**,刘源鑫1,朱乐天1,林坤1   

  1. 1西北农林科技大学资源环境学院, 陕西杨凌 712100; 2中国科学院水利部水土保持研究所, 陕西杨凌 712100
  • 出版日期:2012-02-08 发布日期:2012-02-08

Relationships between soil moisture and environmental factors at different spatial scales.

WANG Xin-zeng1, JIAO Feng1,2**, LIU Yuan-xin1, ZHU Le-tian1, LIN Kun1   

  1. 1College of Resources and Environment, Northwest A & F University, Yangling 712100, Shaanxi, China; 2 Institute of Soil and Water Conservation, Ministry of Water Resources, Chinese Academy of Sciences, Yangling 712100, Shaanxi, China
  • Online:2012-02-08 Published:2012-02-08

摘要: 以延河流域为例,利用典范对应分析方法对坡面、小流域、区域3个尺度的土壤水分与环境因素关系进行研究。结果表明:坡位、土地利用类型是坡面尺度影响土壤水分变化的主控因素;坡度、土地利用类型是小流域尺度影响土壤水分变化的主控因素;蒸散、降水、土地利用类型是区域尺度影响土壤水分变化的主控因素。可见,随着研究尺度的增加,坡向、坡位、坡度等地形承担的信息量逐渐流向蒸散、降水等气象因子,土地利用类型承载的信息量基本未变。结果对土壤水分与水文模型及其尺度外推有重要的意义。

关键词: 秸秆, 微型土壤动物, 土壤功能, 活性资源, 温室气体

Abstract: Taking Yanhe basin as a case, this paper studied the relationships between soil moisture and environmental factors at slope surface, small watershed, and regional scales by using canonical correspondence analysis (CCA). In the basin, slope position and land use type were the main factors controlling soil moisture change at slope surface scale, slope and land use type were the dominating factors at small watershed scale, while evapotranspiration, precipitation, and land use type were the key factors at regional scale, which suggested that with the enlargement of studied spatial scale, the information contained by topographic factors (slope direction, slope position, and slope) gradually converted to climatic factors (evapotranspiration and precipitation), but the information contained by land use type was almost invariant. This study could have significance in studying soil moisture model and hydrological model and their extrapolation.

Key words: rice straw, soil microfauna, soil function, labile resource, greenhouse gas.