Data Availability: All relevant data of figures 1-6 in the paper

these data content the monthly precipitation in 2012 to 2014 and the average value during the recent 15 years (figure 1),soil relative water content in 0–200 cm soil profiles after irrigation and at maturity of different treatments in 2012–2013 and 2013–2014 growing seasons (figure 2), root length density (RLD) at anthesis in 2012–2013 and 2013–2014 growing seasons (figure 3), photosynthetic rate (Pn, A and B), transpiration rate (Tr, C and D) and stomatal conductance (gs, E and F) during grain filling in 2012–2013 and 2013–2014 growing seasons (figure 4), dry matter accumulation in different organs of the plant at anthesis and maturity from different treatments in 2012–2013 and 2013–2014 growing seasons (figure 5), and increase in 1000-grain weight during grain filling in winter wheat plants grown in plots in 2012–2013 and 2013–2014 growing seasons (figure 6).