摘要
以定位观测资料为基础,对辽宁西北部(以下简称辽西北)沙地荒草地、樟子松林、油松林、杨树林、松杨混交林、山杏林、榆树疏林的水量平衡进行了研究。结果表明:辽西北沙地不同植物群落类型土壤贮水量与降雨量的线性相关极显著,荒草地的土壤贮水量优于任何人工植物群落类型。山杏灌木林群落蒸散量最高,为516.09mm,松杨混交林群落次之,为495.79mm,这两种植物群落蒸散量大于同期降雨量461.00mm,植物群落的水量不平衡;荒草地、樟子松林地、油松林地、杨树林地的蒸散量均小于同期降雨量,榆树疏林蒸散量次小,仅为381.34mm,这5类植物群落基本能够维持土壤水量平衡。
Based on the position-monitoring data,in this paper the water balance in typical shrub and arbor woods in sandy land of northwest Liaoning Province is studied.The results show that there is a significant linear correlation between soil moisture content in 7 typical vegetation communities and annual precipitation,especially in pure Populus sp.forest,Ulmus pumila forest and Prunus sibirica L.shrub woods.On which the error of estimated total soil water storage in pure Populus sp.forest and U.pumila forest does not surpass 20%.There is a significant difference of soil water storage between grassland community and the communities of Pinus sylvestris var.mongolica forest,P.tabulaeformis forest,Populus sp.forest and U.pumila forest.There is also a significant difference of soil water storage between P.sylvestris var.mongolica forest and P.tabulaeformis forest.Soil moisture content in grassland community is higher than that in other cultivated vegetation communities.The total evapotranspiration was the highest in P.sibirica woods （516.09 mm）,followed by 495.79 mm in Pinus-Populus mixed forest community,and it was higher in these two vegetation communities than the precipitation of 461.00 mm during the same period.In order to maintain the soil moisture balance,both communities of P.sibirica woods and Pinus-Populus mixed forest must be managed.The total evapotranspiration was lower in the communities of grassland,P.sylvestris var.mongolica forest,P.tabulaeformis forest and Populus sp.forest than the precipitation during the same period.The total evapotranspiration of 381.34 mm in U.pumila forest community was the lowest.
出处
《干旱区研究》
CSCD
北大核心
2010年第4期642-648,共7页
Arid Zone Research
基金
辽宁省教育厅科学研究计划项目(20060381)
关键词
沙地
水量平衡
贮水量
蒸散量
植物群落
辽宁
sandy land
water balance
soil moisture content
evapotranspiration
vegetation community
Liaoning Province
