土壤导气率日变化特征分析  

The Analyze of Soil air Permeability Daily Change Characteristics

作　　者：王卫华[1] 王全九[1,2] 

机构地区：[1]西安理工大学水资源研究所,西安710048 [2]中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点试验室,陕西杨凌712100

出　　处：《灌溉排水学报》2011年第6期25-30,共6页Journal of Irrigation and Drainage

基　　金：国家重点基础研究发展计划(973计划)项目(2005CB121103);中国科学院知识创新工程重要方向项目(KSCX2-YW-N-003)

摘　　要：土壤含水率处于较低水平时,可以忽略其对地表导气率的影响,单一研究温度与导气率之间的关系。针对陕西长武地区玉米地、果树地的土壤表层导气率、地表下5cm导气率进行全天跟踪测量,同时监测地温、气温,从而分析导气率日变化特征。结果表明,玉米地地表导气率随温度的变化而变化,玉米地和果树地表层导气率与气温存在显著线性关系,建立了当地通过地温预测导气率的关系式,为当地土壤导气率的测量提供参考值。In this paper, under no rain, no irrigation conditions that the soil moisture content at a low level, almost no change, in that can be neglected on the rate of soil air permeability, the relationship between soil air permeability and temperature was studied. Using PL - 300 soil air permeability measurement, measured the soil surface air permeability of corn and apple land and under ground 5 cm air permeability for daily observation. At the same time, measured the local air temperature, surface temperature, and under ground 5cm temperature. Through the field experiment on soil air permeability of the day tracking, analyzing the diurnal variation of air permeability, the results were follows： air permeability of corn land changed with surface temperature, air permeability of corn and apple land measured has the liner relationship with air temperature. In this paper, we establish the predicted relationship between soil air permeability of and temperatures provide a reference value for the local soil permeability measurements.

关 键 词：土壤 导气率 地温 日变化特征 

分 类 号：S152[农业科学—土壤学]