Soil saturated hydraulic conductivity ( K_fs ) is one of the important hydraulic parameters in soil physical processes.K_fs in Pinus var.mongolica woodland,shrubbery and grassland in Horqin Sand Land were measured by Gueph permeameter.The results showed that (1) K_fs ranged from 0.63 to 12.50mm/min for these sands in study site,and indicated a tendency of the conductivity at Pinus var.mongolica woodland>grassland>shrubbery;K_fs at Pinus var.mongolica woodland showed a strong tendency to increase with increasing of soil depth,but for grassland it diminished with soil depth increase;Ffor shrubbery,it changed minor;(2) K_fs at Pinus var.mongolica woodland and shrubbery were significant negative related to bulk density;K_fs at shrubbery and grassland were significant negative related to percentage of fine sand,but significant positive related to percentage of middle sand;K_fs at Pinus var.mongolica woodland and grassland were significant positive related to percentage of coarse sand.

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