Effects of schedules of subsurface drip irrigation with air injection on water consumption, yield components and water use efficiency of tomato in a greenhouse in the North China Plain

•Proportion of soil evaporation accounting for ET under SDI was about 20% ～ 30%.•Major water consumption was during flower and fruit stage of tomato.•Pan coefficient should be changed at different living stage to achieve a greater WUE.•Proper depth of drip belt buried was 20 mm and optimized ET was about 290 mm.•Suggested WUE was about 45～50 kg/m3 at which highest yield of tomato would be harvested.