Effect of irrigation methods on root development and profile soil water uptake in winter wheat

Abstract

The 2-year field experiments were carried out to research the effect of different irrigation methods, namely border irrigation, sprinkler irrigation, and surface drip irrigation, on root development and profile water uptake in winter wheat. Results showed that the main root distribution zone moved upward under sprinkler and surface drip irrigation when compared to the traditional border irrigation. Profile root distribution pattern changed with irrigation methods. Soil profile water uptake was correlated to the root system and soil water dynamics. Due to the appropriate soil water and higher root density in the surface soil layer under sprinkler and surface drip irrigation, the main water uptake zone was concentrated in the upper layer. Because of the water deficit in the surface layer under border irrigation, water uptake in 50–100 cm depth was stimulated, which caused the main uptake zone downward. The amount and pattern of root water uptake varied with irrigation methods. This may provide valuable information on the aspect of agricultural management.