摘要
以黄土高原地区17个乔木和15个灌木测定点生长季观测数据为基础,结合气象资料,综合分析了降水量、土壤前期储水量、潜在蒸散量与乔、灌木实际蒸散量的关系,研究了不同降雨年型乔、灌木生长季实际蒸散的差异及其影响因素。结果表明,无论是丰水年还是干旱年,乔木生长季实际蒸散量均高于灌木。不同降雨年型影响乔灌木实际蒸散的主要因素不同,丰水年影响乔灌木生长季实际蒸散的主要因素为降水,其次为潜在蒸散量;而干旱年影响乔灌木生长季实际蒸散的主要因素为前期土壤储水量,其次为降水因素。
Based on the growing-season field measurements of seventeen arbor sites and fifteen shrub sites and combined with the meteorological data, the actual evapotranspiration during the growing season for arbors and shrubs were calculated and compared, and the impacts of precipitation, initial soil water storage and po- tential evapotranspiration on actual evapotranspiration with different precipitation patterns were analyzed. The results showed that the amount of growing-season actual evapotranspiration for arbors was higher than that for shrubs in both the dry and wet years. The influencing factors of actual evapotranspiration were dif- ferent with different precipitation patterns. In the wet year, the actual evapotranspiration was mainly influ- enced by the precipitation, followed by the potential evapotranspiration; while in the dry year, the major fac- tor that influences the actual evapotranspiration was initial water storage, followed by the precipitation. This study provides a guide for vegetation reconstruction of the Loess Plateau.
出处
《水土保持通报》
CSCD
北大核心
2013年第6期207-212,共6页
Bulletin of Soil and Water Conservation
基金
国家自然科学基金项目"黄土高原降水梯度带生态水文过程演变与最佳植被盖度研究"(41171186)
关键词
黄土高原
蒸散
乔木
灌木
降雨类型
the Loess Plateau
evapotranspiration
arbors
shrubs
precipitation
