Effect of Irrigation on Dynamics of Soil Water and Water Use Efficiency under Double-cropped Winter Wheat-Summer Maize
GUO Zifeng
GONG Daozhi
HAO Weiping
MEI Xurong
YAN Yongluan
LIU Lin
LI Yuqin
ZHANG Wenying
LIU Binhui
Abstract：Two wheat genotypes and two maize genotypes in different drought tolerance were screeded to study the dynamic change of soil water and water use efficiency (WUE) by designing different irrigation treatments.The two years experiment results showed that the infiltration was a slow process,substantially in a period of 1 year.In the growth period of winter wheat,the soil water content in the 0～60 cm changed greatly.It was the main reason that the water below 60 cm soil couldn't be used by the summer maize resulted in the low irrigation efficiency.Through the analysis of winter WUE,the WUE increased with increasing irrigation frequency for drought resistant and water saving genotypes.Contrary to the drought sensitive genotypes.The yield changed little and the water consumption decreased for the drought resistant and water saving genotypes in the water deficit that WUE increased.Therefore,the selection of drought resistant and water saving wheat,moderate reduction of irrigation frequency,could reduce invalid irrigation infiltration,without affecting the production,it could also improve the water use efficiency in the North China plain.
Keywords：winter wheatsummer maizeirrigationdynamics of soil waterwater use efficiency
Publication Date：2017-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 14-19 )