关键词: 植被类型, 土壤水分状况, 水分动态

Abstract: Abstract Soil moisture parameter, mechanical composition and soil moisture condition of various lands including artificial Larix principis-rupprecldii forest land on shady slope, artificial Lanx pinciyis-forest sandy land，Hippophae rhammoides shrub land，sandy grassland and flat grassland in the semiarid-subhumid transition zone in the Bashang region of Hebei Province were analysed. The results showed that the field moisture capacity, capillary moisture capacity and maximum moisture capacity displayed a significant positive correlation with two soil particle fractions，namely 0.01~0.05 mm and 0.001~0.01 mm but a negative correlation with the soil panicle fraction 0.25~0.05 mm. Even in the drought years the soil water storage and the effective water storage in 0~100 cm soil layer roughly kept balanced in sandy grassland, Hippophae rhammoides shrub land and sandy populus nigra forest land at the beginning and end of growth season. On the other hand, the artificial Larvr principis-rupprechtii forest land exhibited a severe water deficiency, however, it still kept an effective water storage of 27 mm at the end of growth season. From this it was concluded that the establishment of artificial vegetation in the region should be in the order, i. e. plant herbs first, then plant shrubs and finally plant trees. Analysed from the angle of soil moisture balance such a planting order is feasible.

Key words: Vegetation type, Soil water condition, Water dynamic