摘要
通过定位监测与对比分析,对辽宁西北部沙地的不同植被类型的土壤水分变化情况进行了研究。结果表明:在半干旱的沙地,不论是在生长初期、生长盛期还是生长末期,灌木林地表层土壤水分含量最低,乔木林地深层土壤水分最低,草地类型水分含量始终最高,灌木林生长依赖于降雨,而乔木林则依赖于降雨和地下水位高低的双重作用。土壤水分的季节性变化是降雨和植物生长、地下水位共同作用的结果。降雨和植物生长对表层土壤的含水量影响较大,而对深层土壤水分的作用不大。土壤水分的季节性变化与降雨和植物生长的变化相似。
Dynamic changes of soil moisture of different vegetation in sandy land of northwestern Liaoning Province were studied by position-monitoring and comparatively analyzing.The results showed that in semiarid sand land,soil moisture content was the least at the surface layer in shrub land,at the deep soil layer in arbor forest land during the whole growth and development stage.Soil moisture content kept the highest in grassland during the sampling period.Bush growth on the sandy land depended on the rainfall,while,arbor forest growth depended on the rainfall and the groundwater.The seasonal variation of soil water was the result of the rainfall and plant growth,the effect of rainfall and plant growth on soil water change of surface layer was notable,and that on substrate was unconspicuous.The seasonal change of soil water was similar to the seasonal variation of rainfall and plant growth.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2010年第10期111-115,共5页
Journal of Arid Land Resources and Environment
基金
辽宁省教育厅科学研究计划(20060381)资助
关键词
辽西北沙地
植被群落
土壤水分
sandy land of northwestern Liaoning Province
plant communities
soil moisture
