不同景观植被类型下土壤含水量对比研究——以西安南郊为例  

Compared Research on the Soil Moisture Content in Different Vegetation Types of Field

作　　者：李广文[1] 孙虎[1] 肖军[1] 

机构地区：[1]陕西师范大学旅游与环境学院,陕西西安710062

出　　处：《安徽农业科学》2006年第1期110-111,共2页Journal of Anhui Agricultural Sciences

基　　金：陕西省自然科学基金项目(2002D02);国际地质对比计划项目(IGCP448)

摘　　要：通过时西安南郊地区黄土层的取样分析，研究了不同植被下0～600cm土壤含水量变化。通过称重烘干法得出，林地、麦地土壤含水量从地表向下呈现出由高到低再到高的变化规律。土层具有分层性，分为速变层、缺水层和稳定层。在不同植被影响下，植物相应缺水带分布范围不同，麦地较浅0．7～2．2m，林地较深1，5～3．8m，这是由于植物根系分布范围不同造成的。杨树林下2～3．8m出现轻度土壤干层现象，但林木生长正常，在城市建设中可以考虑加强林木隔离带建设。长安区少陵塬土壤水分充足，适宜农作物种植。Based on the sampling under the artificial forest in south suburb of Xian city and the analysis in the lab, the change of soil moisture content from zero to six meters was studied. Through weighing after being dried, soil moisture content demonstrated the draw of high to low and then to high from top to bottom. The soil can be divided into three layers： rapidly change layer, water lack layer and stable layer. The range of lacking water layer was different because of different plants. The range of lacking water layer of com-field was between 0.7 m and 2.2 m,while the range of lacking water layer of woods land was between 1.5 m and 3.8 m,which was deeper than that of com-field. The reason of it was that the range of plant root system was distributed differently. Slight soil dried layers appeared between 2 m and 3.8 m under the forest, but forest grow normally. We can consider strengthening forest median construction in the urban construction. Soil moisture content in sao-ling tomb was sufficient, which was suitable for planting crops.

关 键 词：土壤含水率 植被类型 西安市 

分 类 号：S152.71[农业科学—土壤学]