Studied yield

soil water content changing in root layer and water use efficiency of different cropping systems that was winter wheat-summer maize two harvests in one year

winter wheat-summer maize-spring maize three harvests in two years and spring maize one harvest in one year.Results indicated that there were significant effects of different cropping systems on yield

water consumption and water use.The yield

water consumption and water use efficiency of two harvests in one year was higher than another two cropping systems

however

it need more groundwater to irrigation because the precipitation only met 72.9% of water consumption.Three harvests in two years met 80.4% of water consumption

meanwhile the yield

water consumption and water use efficiency decreased 23.1%

12.0% and 15.8% compared to two harvests in one year.One harvest in one year met 89.2% of water consumption

meanwhile the yield

water consumption and water use efficiency decreased 45.2%

27.3% and 30.7% compared to two harvests in one year.Soil water content in 2 meters of two harvests in one year and three harvests in two years changed waving and one harvest in one year changed gently during two years.Compared another two cropping systems

three harvests in two years gave attention to sustainability of water resource and food safety due to higher rate of precipitation occupied water consumption in growing stage while the yield and water use efficiency intervenient another two cropping systems.Appropriate cultivating management of high yield need be studied further.