Soil water content variations and hydrological relations of the cropland-treebelt-desert land use pattern in an oasis-desert ecotone of the Heihe River Basin, China

Auteur(s) et Affiliation(s)



Description :
In this study, the volumetric soil water content and plant root distribution was measured to 300 cm depth along a cropland-treebelt-desert site at the oasis-desert ecotone in the Heihe River Basin, China. The results showed that the mean soil water content in the 0–200 cm layer was greater in the cropland (8.88%) than that in the treebelt (5.78%) and desert (4.37%) as a result of frequent irrigation events. The decline process in soil water content pulse of the cropland and treebelt after irrigation event could be well described by an exponential decay function. The hydrological relation between treebelt and cropland in the upper soil layer was mainly occurred by treebelt root water uptake from cropland. The soil water uptake by treebelt root from cropland decreased logarithmically with distance. The results indicated that the percolation in the cropland was an important water source for the growth of treebelt and desert plants.


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2014, vol. 123, p. 52-61, nombre de pages : 10, Références bibliographiques : 38 ref.

Date :
2014

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena