摘要
以水量供耗平衡为基本原理,以土壤水分有效性含量界线作为土壤供水起算值计算土壤的有效供水量,以黄土区主要造林树种的蒸腾耗水与土壤蒸发为耗水量,根据土壤水分供耗的动态平衡推导出黄土高原退耕还林还草区不同植被的适宜覆被率计算公式。并以晋西黄土区吉县为例,对所选择的样地进行多年的定位观测,得出研究区主要造林树种林地的土壤有效水含量、林冠截留率、产流率、土壤水分、土壤蒸发、林地蒸散各参数,计算出研究区主要造林树种(油松、刺槐)和草种的适宜覆被率,旨在为该地区乃至整个退耕还林还草工程及其他林业生态工程的防护林体系高效空间配置和稳定林分结构设计提供理论依据。
Based on the balance between water supply （available soil moisture） of soil and water consumption by vegetation transpiration and soil evaporation, this study focus on determining the suitable vegetation coverage in the slope of loess area where carried on the policy of returning farmland to forests and grass land. loess area, Ji County in Shanxi Province, was taken as a case study. According to a long-term monitoring in the research area, the following parameters, available soil water content, the intercepting rate, runoff coefficient, soil water content, soil evaporation and evapotranspiration were get in the main forest lands, Based on all the above variables, the suitable vegetation coverage of the main species （including Pinus tabulaeformis, Robinia psedoacacia, shrub and grass） in the research area was calculated using the model developed, The results will provide the theoretical foundation for the project of returning farmland to forests and grassland and other forestry ecological engineering projects on the designing of efficient spatial distribution and stable stand structure for protection forest.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2007年第4期17-23,共7页
Scientia Silvae Sinicae
基金
"十五"科技攻关项目"退耕还林还草工程区水土保持型植被建设技术研究与示范"(2001BA510B01)
