an increasing trendP < 0.05
The contribution of preanthesis stem assimilates Within the two planting seasons, 2012–2013 and 2013–2014, DMT and DMTe showed an increasing trend with cultivation decade (Fig. 7 ); moreover, DMT showed the most evident increasing trend under the irrigation treatment in 2013–2014 (R 2 Ir = 0.582, P < 0.05), which was similar to that of DMTe (R 2 D = 0.709, P < 0.01).