干旱地区农业研究2009，Vol.27Issue(4)：54-59,64,7.
黄土地表生物结皮对土壤贮水性能及水分入渗特征的影响
Effects of biological soil crusts on soil water storage capability and permeability in loess area
摘要
Abstract
Method of double-rings was employed to study the characteristics of soil water storage capacity and permeability of three types of biological soil crust (moss -algal crust, algal crust and thin-layer algal crust) on the loess area of Pia nguan, Shanxi Province. The results showed that water storage capacity of differ ent crust types is influenced by the thickness of biological soil crust and soil porosity, the water storage capacity was from 502.69～525.80 t/hm2 and the no n-capillary water capacity was from 169.71～198.29 t/hm2 with in 10mm soil de pth of the three crust types. The soil initial permeability was from 5.19～11.10 mm/min, the no crust soil had the highest velocity and the moss-algal crust so il had the lowest velocity. The solid permeability rate was from 1.67～2.67 mm/m in. By using the Horton seepage model, the fitted value was close to measured va lue and the range of determination coefficient was 0.98～0.99. Therefore, the Ho rton seepage model was applied to describe the soil infiltration characters whic h covered with biological soil crust in experimental region.关键词
土壤生物结皮/贮水能力/入渗速率/入渗模型Key words
biological soil crust/water storage capacity/infiltration rate/infiltration m odel分类
农业科技引用本文复制引用
王翠萍,廖超英,孙长忠,田小雄,吕建亮..黄土地表生物结皮对土壤贮水性能及水分入渗特征的影响[J].干旱地区农业研究,2009,27(4):54-59,64,7.基金项目
国家自然科学基金项目(30670339) （30670339）
